bluuebunny/crossref_metadata_2025 huggingface dataset:
The Nature of Aqueous Solutions: Insights into Multiple Facets of Chemistry and Biochemistry from Freezing‐Point Depressions
Authors: Zavitsas Andreas A.
Published: April 2010

Contrary to current widely held beliefs, many concentrated aqueous solutions of electrolytes and nonelectrolytes behave ideally. For both, the same simple equation yields mole fractions of water that are equal to the theoretical activities of water. No empirical activity coefficients or ad hoc parameters are needed. Thermodynamic hydration numbers and the number of particles produced per mole of solute are found by searching freezing‐point depression measurements, as if asking the water, “How much available water solvent is left and how many solute particles are there?” The results answer questions currently under debate: Do solutes alter the nature of water outside their immediate surroundings? What is the number of ion pairs formed by various electrolytes and what affects extents of their formation? What are some factors that cause precipitation of proteins, latexes, and so forth from aqueous solutions upon addition of other solutes (Hofmeister series)? Which nonelectrolytes form aggregates in water and what are the implications? Why do different solutes affect viscosity differently? How do ion‐selective channels in cell membranes function at the molecular level?
Stabilization of HHeF by Complexation: Is it a Really Viable Strategy?
Authors: Giordani Maria , Antoniotti Paola , Grandinetti Felice
Published: April 2010

Ab initio calculations at the MP2 and CCSD(T) levels of theory have disclosed the conceivable existence of fluorine‐coordinated complexes of HHeF with alkali‐metal ions and molecules M+(M+=Li+–Cs+), M+–OH2, M+–NH3(M+=Li+, Na+), and MX (M=Li, Na; X=F, Cl, Br). All these ligands L induce a shortening of the HHe distance and a lengthening of the HeF distance accompanied by consistent blue‐ and redshifts, respectively, of the HHe and HeF stretching modes. These structural effects are qualitatively similar to those predicted for other investigated complexes of the noble gas hydrides HNgY, but are quantitatively more pronounced. For example, the blueshifts of the HHe stretching mode are exceptionally large, ranging between around 750 and 1000 cm−1. The interactions of HHeF with the ligands investigated herein also enhance the (HHe)+F−dipole character and produce large complexation energies of around 20–60 kcal mol−1. Most of the HHeF–L complexes are indeed so stable that the three‐body dissociation of HHeF into H+He+F, exothermic by around 25–30 kcal mol−1, becomes endothermic. This effect is, however, accompanied by a strong decrease in the HHeF bending barrier. The complexation energies, ΔE, and the bending barriers,E*, are, in particular, related by the inverse relationshipE*(kcal mol−1)=6.9exp[−0.041ΔE(kcal mol−1)]. Therefore the HHeFL complexes, which are definitely stable with respect to H+He+F+L (ΔE≈25–30 kcal mol−1), are predicted to have bending barriers of only 0.5–2 kcal mol−1. Overall, our calculations cast doubt on the conceivable stabilization of HHeF by complexation.
Direct Electrochemistry of Cytochrome c at Modified Si(100) Electrodes
Authors: Ciampi Simone , Gooding J. Justin
Published: April 2010

This paper demonstrates the direct electron transfer between the heme moiety of horse hearth cytochrome c and a pyridinyl group on self‐assembled‐monolayer‐modified Si(100) electrodes. Self‐assembled monolayers (SAMs) containing the putative receptor ligand were prepared by a step‐wise procedure using “click” reactions of acetylene‐terminated alkyl monolayers and isonicotinic acid azide derivatives. Unoxidized Si(100) electrodes, possessing either isonicotinate or isonicotinamide receptor ligands, were characterized using X‐ray photoelectron spectroscopy, contact‐angle goniometry, cyclic voltammetry, and electrochemical impedance spectroscopy. The ability of isonicotinic acid terminated layers to coordinatively bind the redox center of cytochrome c was found to be restricted to pyridinyl assemblies with a para‐ester linkage present. The protocol detailed here offers an experimentally simple modular approach to producing chemically well‐defined SAMs on silicon surfaces for direct electrochemistry of a well‐studied model redox protein.
BCl3‐Mediated Ene Reaction of Sulfur Dioxide and Unfunctionalized Alkenes
Authors: Marković Dean , Volla Chandra M. R. , Vogel Pierre , Varela‐Álvarez Adrián , Sordo José A.
Published: April 2010

The first ene reactions of SO2 and unfunctionalized alkenes are reported. Calculations suggest that the endergonic ene reactions of SO2 with alkenes can be used to generate β,γ‐unsaturated sulfinyl and sulfonyl compounds. Indeed, in the presence of one equivalent of BCl3, the unstable sulfinic acid form stable sulfinic acid⋅BCl3 complexes that can be reacted in situ with NCS to generate corresponding sulfonyl chlorides, or with a base to generate corresponding sulfinates. The latter can be reacted with electrophiles to generate sulfones, or with silyl chloride to form β,γ‐unsaturated silyl sulfinates. The sulfinic acid⋅BCl3 complexes can be reacted with ethers that act as oxygen nucleophiles to produce corresponding sulfinic esters. Thus one‐pot, three‐component synthesis of β,γ‐unsaturated sulfonamides, sulfinyl esters and sulfones have been developed starting from alkenes and sulfur dioxide (reagent and solvent).
Rapid Colorimetric Identification and Targeted Photothermal Lysis of Salmonella Bacteria by Using Bioconjugated Oval‐Shaped Gold Nanoparticles
Authors: Wang Shuguang , Singh Anant K. , Senapati Dulal , Neely Adria , Yu Hongtao , Ray Paresh C.
Published: April 2010

Salmonella bacteria are the major cause for the infection of 16 million people worldwide with typhoid fever each year. Antibiotic‐resistant Salmonella strains have been isolated from various food products. As a result, the development of ultrasensitive sensing technology for detection and new approaches for the treatment of infectious bacterial pathogens that do not rely on traditional therapeutic regimes is very urgent for public health, food safety, and the world economy. Driven by this need, we report herein a nanotechnology‐driven approach that uses antibody‐conjugated oval‐shaped gold nanoparticles to selectively target and destroy pathogenic bacteria. Our experiments have shown the use of a simple colorimetric assay, with an anti‐salmonella antibody conjugated to oval‐shaped gold nanoparticles, for the label‐free detection of S. typhimurium with an excellent detection limit (104 bacteria per mL) and high selectivity over other pathogens. When bacteria conjugated to oval‐shaped gold nanoparticles were exposed to near‐infrared radiation, a highly significant reduction in bacterial cell viability was observed due to photothermal lysis. Ideally, this nanotechnology‐based assay would have enormous potential for rapid, on‐site pathogen detection to avoid the distribution of contaminated foods.
Experimental Evidence for the Involvement of Dinuclear Alkynylcopper(I) Complexes in Alkyne–Azide Chemistry
Authors: Buckley Benjamin R. , Dann Sandra E. , Heaney Harry
Published: April 2010

Dinuclear alkynylcopper(I) ladderane complexes are prepared by a robust and simple protocol involving the reduction of Cu2(OH)3OAc or Cu(OAc)2 by easily oxidised alcohols in the presence of terminal alkynes; they function as efficient catalysts in copper‐catalysed alkyne–azide cycloaddition reactions as predicted by the Ahlquist–Fokin calculations. The same copper(I) catalysts are formed during reactions by using the Sharpless–Fokin protocol. The experimental results also provide evidence that sodium ascorbate functions as a base to deprotonate terminal alkynes and additionally give a convincing alternative explanation for the fact that the CuI‐catalysed reactions of certain 1,3‐diazides with phenylacetylene give bis(triazoles) as the major products. The same dinuclear alkynylcopper(I) complexes also function as catalysts in cycloaddition reactions of azides with 1‐iodoalkynes.
ChemInform Abstract: Crystal Growth, Crystal Structure of New Polymorphic Modification, β‐Bi2B8O15 and Thermal Expansion of α‐Bi2B8O15.
Authors: Bubnova R. S. , Alexandrova J. V. , Krivovichev S. V. , Filatov S. K. , Egorysheva A. V.
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Phase Relationships of the La—Al—Sb System at 773 K from 0 to 50.0 at.% Sb.
Authors: Chen Yeqing , Feng Qiang , Zeng Lingmin , He Jiejun , He Wei
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis and Structural Characterization of a New Two‐Dimensional Organic‐Inorganic Hybrid Molybdoarsenate: [Cu(en)2]2 [(CuO6)Mo6O18 (As3O3)2].
Authors: Wu Qiang , Han Qiuxia , Chen Lijun , Ma Pengtao , Niu Jingyang
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Crystal Growth, Structure and Magnetic Properties of the Double Perovskites Ln2MgIrO6 (Ln: Pr, Nd, Sm—Gd).
Authors: Mugavero Samuel J. III , Fox Adam H. , Smith Mark D. , zur Loye Hans‐Conrad
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Palladium‐Catalyzed Aryl C—H Bonds Activation/Acetoxylation Utilizing a Bidentate System.
Authors: Gou Fa‐Rong , Wang Xiang‐Chuan , Huo Peng‐Fei , Bi Hai‐Peng , Guan Zheng‐Hui , Liang Yong‐Min
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Nickel‐Catalyzed Regioselective Carbomagnesation of Methylenecyclopropanes Through a Site‐Selective Carbon—Carbon Bond Cleavage.
Authors: Terao Jun , Tomita Masahiro , Singh Surya Prakash , Kambe Nobuaki
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Ruthenium‐Catalyzed Selective Regio‐ and Mono‐Allylation of Cyclic 1,3‐Diketones Using Allyl Alcohols as Substrates.
Authors: Gruber Stefan , Pregosin Paul S.
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Stereoselective Phosphine‐Catalyzed Synthesis of Highly Functionalized Diquinanes.
Authors: Wilson Jonathan E. , Sun Jianwei , Fu Gregory C.
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A Convenient, Highly Stereoselective, Metal‐Free Synthesis of Chiral Amines.
Authors: Guizzetti Stefania , Benaglia Maurizio , Biaggi Cinzia , Celentano Giuseppe
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Pd/C‐Catalyzed Reductive Mono‐N‐alkylation of Nitrophenol Derivatives in One‐Pot Way.
Authors: Jin Zhonghao , Li Dao , Wang Xingyi , Lu Guanzhong
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: An Efficient MnCl2‐Catalyzed Tandem Acylation‐Cross‐Coupling Reaction of o‐Halobenzoyl Chloride with Diorganyl Magnesium Compounds.
Authors: Zhang Fengmin , Shi Zhuangzhi , Chen Feng , Yuan Yu
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Ruthenium‐Catalyzed Synthesis of β‐Oxo Esters in Aqueous Medium: Scope and Limitations.
Authors: Cadierno Victorio , Francos Javier , Gimeno Jose
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Exploration of Braverman Reaction Chemistry. Synthesis of Tricyclic Dihydrothiophene Dioxide Derivatives from Bispropargyl Sulfones.
Authors: Feldman Ken S. , Selfridge Brandon R.
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Three‐Component Synthesis of Tricyclic Lactams Containing the Pyrrolizidin‐3‐one Moiety.
Authors: Kudryavtsev K. V.
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis and Antibacterial Activity of Isothiazolyl Oxazolidinones and Analogous 3(2H)‐Isothiazolones.
Authors: Adibpour Neda , Khalaj Ali , Rajabalian Saeed
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Mesoporous ZnS Nanospheres: A High Activity Heterogeneous Catalyst for Synthesis of 5‐Substituted 1H‐Tetrazoles from Nitriles and Sodium Azide.
Authors: Lang Leiming , Li Baojun , Liu Wei , Jiang Li , Xu Zheng , Yin Gui
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Novel Isochromene Derivatives by Tandem Ugi Reaction/Nucleophilic Substitution.
Authors: Banfi Luca , Basso Andrea , Casuscelli Francesco , Guanti Giuseppe , Naz Farah , Riva Renata , Zito Paola
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Stereoselective Synthesis of Highly Substituted Annulated Dihydropyrans Based on γ‐Lithiation and Homoaldol Reaction of an Enantiopure α‐Silylated Vinyl Carbamate.
Authors: Hemery Therese , Wibbeling Birgit , Froehlich Roland , Hoppe Dieter
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of 2,2′‐Bipyridines via Suzuki—Miyaura Cross‐Coupling.
Authors: Guetz Christoph , Luetzen Arne
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Facile Synthesis of Imidazo[1,2‐a]pyridines via Tandem Reaction.
Authors: Jia Jiong , Ge Yan‐Qing , Tao Xu‐Tang , Wang Jian‐Wu
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Discovery of Novel Antitubercular 2,10‐Dihydro‐4aH‐chromeno[3,2c]pyridin‐3‐yl Derivatives.
Authors: Sriram Dharmarajan , Yogeeswari Perumal , Dinakaran Murugesan , Banerjee Debjani , Bhat Pritesh , Gadhwal Sunil
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: An Expeditious Method for the Preparation of 2‐Hydroxy‐1,4‐dioxane and Its Use in Reductive Alkylation of Amines.
Authors: Vinter Adrijana , Avdagic Amir , Stimac Vlado , Palej Ivana , Cikos Ana , Sunjic Vitomir , Alihodzic Sulejman
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis and Cytotoxic Activity of 2‐Methylimidazo[1,2‐a]pyridine‐ and Quinoline‐Substituted 2‐Aminopyrimidine Derivatives.
Authors: Vilchis‐Reyes Miguel Angel , Zentella Alejandro , Martinez‐Urbina Miguel Angel , Guzman Angel , Vargas Omar , Ramirez Apan Maria Teresa , Ventura Gallegos Jose Luis , Diaz Eduardo
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Anthranoylhydrazones (III) of Aliphatic Aldehydes and Their Cyclization to Quinazolin‐4‐one Derivatives (IV).
Authors: Ershov A. Yu. , Lovushkina N. A. , Lagoda I. V. , Yakimovich S. I. , Zerova I. V. , Pakal'nis V. V. , Shamanin V. V.
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: First Example of Reaction of Asymmetric Dienone Derivatives of Cyclohexane with 3‐Amino‐1,2,4‐triazole. Formation of Isomeric Octahydrotriazoloquinazolines.
Authors: Varshalomidze I. E. , Golikov A. G. , Krivenko A. P.
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: One‐Pot Tandem 1,4—1,2‐Addition of Phosphites to Quinolines.
Authors: De Blieck Ann , Masschelein Kurt G. R. , Dhaene Frederic , Rozycka‐Sokolowska Ewa , Marciniak Bernard , Drabowicz Jozef , Stevens Christian V.
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A New Temperature‐Programmed Calcination Route to Remove the Organic Templates from Mesoporous Aluminophosphate Materials
Authors: Yu Jing , Tan Juan , Wang An J. , Li Xiang , Hu Yong K.
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Non‐Traditional Ligands in F‐Block Chemistry
Authors: Liddle Stephen T.
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Recent Developments in Indium Metal and Its Salts in Organic Synthesis
Authors: Yadav J. S. , Antony Aneesh , George Jimil , Reddy Basi V. Subba
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Application of Sulfamic Acid in Organic Synthesis
Authors: Heravi Majid M. , Baghernejad Bita , Oskooie Hossein A.
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Developments in Fluorocyclization Methodologies
Authors: Wilkinson Susan C. , Salmon Roger , Gouverneur Veronique
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Metal Complexes of Amino Acids and Peptides
Authors: Farkas E. , Sovago I.
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Five‐Membered Ring Systems with More than One N Atom
Authors: Yet Larry
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Potassium Trifluoroborate Salts as Convenient, Stable Reagents for Difficult Alkyl Transfers
Authors: Molander Gary A. , Sandrock Deidre L.
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Alternative Solvent‐Free Methodologies in the Synthesis of Pharmaceutical Drugs
Authors: Shearouse William C. , Waddell Daniel C. , Mack James
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Six‐Membered Ring Systems: Pyridine and Benzo Derivatives
Authors: Hopper Darrin W. , Crombie Aimee L. , Clemens Jeremy J. , Kwon Soojin
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Elucidation of Accelerated Blood Clearance Phenomenon Caused by Repeat Injection of PEGylated Nanocarriers.
Authors: Koide Hiroyuki , Asai Tomohiro , Hatanaka Kentaro , Shimizu Kosuke , Yokoyama Masayuki , Ishida Tatsuhiro , Kiwada Hiroshi , Oku Naoto
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Green Chemistry: Principles and Practice
Authors: Anastas Paul , Eghbali Nicolas
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Photo‐CIDNP Spectroscopy
Authors: Goez Martin
Published: April 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Application of the Response Surface Method for Optimization of Headspace Liquid Phase Microextraction of Trihalomethanes in Drinking Water
Authors: Sun Aide , Chen Wei , Lin Tao , Xu Qingcai
Published: April 2010

An optimized analysis method based on headspace liquid phase microextraction (HS‐LPME) and gas chromatography coupled with mass spectrometry was proposed for the determination of trihalomethanes (THMs) in drinking water. The response surface method (RSM) was used to optimize the extraction of THMs for analysis by HS‐LPME. The temperature, extraction time and NaCl concentration were found to be important extraction parameters. The coefficient of determination (R2) for the model was 94.97%. A high probability value (P < 0.0001) for the regression indicated that the model had a high level of significance. The optimum conditions were seen to be: temperature 42.0°C, NaCl concentration 0.30 g/mL, and extraction time 28 min. The response variable was the summation of the THMs chromatography peak areas and the reproducibility of this was investigated in five replicate experiments under the optimized conditions. The relative standard deviations (RSD%) of the THMs ranged from 8.0–11.6%. The limits of detection (LODs), based on a signal‐to‐noise ratio (S/N) of three ranged from 0.42–0.78 μg/L, and were lower than the maximum limits for THMs in drinking water established by the WHO.
Effects of Hydrogel Amendment to Different Soils on Plant Available Water and Survival of Trees under Drought Conditions
Authors: Agaba Hillary , Baguma Orikiriza Lawrence Justus , Osoto Esegu John Francis , Obua Joseph , Kabasa John David , Hüttermann Aloys
Published: April 2010

The effect of super absorbent polyacrylate (SAP) hydrogel amendment to different soil types on plant available water (PAW), evapotranspiration and survival of Eucalyptus grandis, Eucalyptus citriodora, Pinus caribaea, Araucaria cunninghamii, Melia volkensii, Grevillea robusta, Azadirachta indica, Maesopsis eminii and Terminalia superba was investigated. The seedlings were potted in 3 kg size polythene bags filled with sand, loam, silt loam, sandy loam and clay soils, amended at 0 (control), 0.2 and 0.4% w/w hydrogel. The tree seedlings were allowed to grow normally with routine uniform watering in a glass house set up for a period of eight weeks, after which they were subjected to drought conditions by not watering any further. The 0.4% hydrogel amendment significantly (p < 0.05) increased the PAW by a factor of about three in sand, two fold in silt loam and one fold in sandy loam, loam and clay soils compared to the control. Similarly, the addition of either 0.2 or 0.4% hydrogel to the five soil types resulted in prolonged tree survival compared to the controls. Araucaria cunninghammi survived longest at 153 days, while Maesopsis eminii survived least (95 days) in sand amended at 0.4% after subjection to desiccation. Evapotranspiration was reduced in eight of the nine tree species grown in sandy loam, loam, silt loam and clay soils amended at 0.4% hydrogel. It is probable that soil amendment with SAP decreased the hydraulic soil conductivity that might reduce plant transpiration and soil evaporation.
DNA Hybridization in Thermoresponsive Polymer Nanoparticles
Authors: Moura Leila M. , Martinho Jose M. G. , Farinha Jose Paulo S.
Published: April 2010

We achieve very high hybridization efficiencies by using a new method to immobilize DNA strands on the surface of thermoresponsive polymer nanoparticles. Hybridization efficiencies of about 70 % are obtained between the DNA immobilized in the particles and a complementary strand in solution, even at very low ionic strengths (1 mM). The polymer nanoparticles have a glassy poly(methylmethacrylate) (PMMA) core and a thermoresponsive shell of poly(N‐isopropylacrylamide) (PNIPAM) containing positive charges. After a DNA strand labeled with a fluorescence probe is loaded onto the particles at room temperature, the temperature is increased above the volume phase transition temperature of the PNIPAM shell, TVPT ≈28 °C. The collapse of the particle shell immobilizes the DNA while maintaining its availability for hybridization with a complementary strand. Förster resonance energy transfer (FRET) is used to detect the hybridization with a complementary DNA strand labeled with a FRET acceptor probe.
Enhanced Reactivity for Hydrogen Reactions at Pt Nanoislands on Au(111)
Authors: Wolfschmidt Holger , Weingarth Daniel , Stimming Ulrich
Published: April 2010

We report high exchange current densities exceeding 1 A cm−2 at Pt nanostructures on Au(111) for hydrogen‐related reactions. Such activity is found at Pt nanoparticles with a coverage of less than 10 % of a monolayer on Au(111) and on single Pt particles deposited on Au(111). Potential pulse technique as well as micropolarization curves with overpotentials of ±10 mV were used in the case of extended nanostructured surfaces to determine the activity. Single Pt particles were investigated in an in situ electrochemical scanning tunneling microscope setup using the STM tip as local sensor. The reactivity obtained on Pt nanostructured Au(111) towards hydrogen reactions were subsidized by single particle reactivity measurements. The specific activity of platinum is enhanced by more than a factor of 1000 as compared to a Pt(111) single crystal. Aspects that may explain this enhancement such as an involvement of the substrate, highly reactive defect sites and enhanced mass transport are discussed.
Vibrational behavior of matrix‐isolated ions in Tutton compounds IV. Infrared spectroscopic study of NH4+ and SO42‐ ions included in nickel sulfates and selenates
Authors: Marinova D. , Georgiev M. , Stoilova D.
Published: April 2010

Infrared spectra of K2Ni(SeO4)2·6H2O and (NH4)2Ni(SeO4)2·6H2O containing SO42‐ ions and those of K2Ni(SO4)2·6H2O and K2Ni(SeO4)2·6H2O containing NH4+ ions are presented and discussed in the region of ν3 and ν1 of the sulfate ions and in the region of ν4 of the NH4+ ions, respectively. The SO42‐ ions matrix‐isolated in the selenate matrices (approximately 1 mol%) exhibit three bands for ν3 and one band for ν1 in agreement with the low site symmetry C1 of the host selenate ions. The NH4+ guest ions included in the potassium sulfate matrix are characterized also with three bands for ν4. However, the ammonium ions in (NH4)2Ni(SeO4)2·6H2O as well as those included in K2Ni(SeO4)2·6H2O display four infrared bands corresponding to ν4 due probably to some kind of disorder of the ammonium ions. The extent of energetic distortion of the isomorphously included sulfate ions as deduced from the values of Δν3 and Δνmax is commented. The spectroscopic experiments reveal that the SO42‐ guest ions are weaker distorted in the selenate matrices as compared to the same ions in the neat sulfates due to the larger unit‐cell volumes of the selenate compounds. The band positions of the water librations in the host potassium compounds are affected by the included ammonium cations. The formation of hydrogen bonds between the NH4+ guest ions and the XO42‐ host ions leads to a decrease in the proton acceptor capabilities of the anions and as a result the hydrogen bonds weaken on going from the neat potassium compounds to the mixed crystals. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Epitaxial Sn1‐xPbxS nanorods on iso‐compositional thin films
Authors: Bente K. , Lazenka V. V. , Unuchak D. M. , Wagner G. , Gremenok V. F.
Published: April 2010

Based on SnS (Herzenbergite) – SnPbS2 (Teallite) mixed crystals with orthorhombic layer structures, thin films and lawns of Sn1‐xPbxS nanorods were produced using hot wall vacuum deposition method (HWVD). The lawn was formed onto the surface of an underlying thin Sn1‐xPbxS film which is build by differently oriented blocks. The density of rods arranged like a lawn depends on the metal ratio and substrate temperature. X‐ray and TEM analysis of the epitaxial material showed preferential (001) orientation perpendicular to the surface of the glass substrate. The roughness of the films measured by atomic force microscopy was in the range of Rq = 49.5–86.3 nm depending on lead concentration The rods were about 500 nm high and 300 nm in diameter. As revealed by TEM‐EDX experiments the droplet at the tip of rods consists of tin. Therefore it is assumed the rods grew via a self‐consuming vapor–liquid–solid (VLS) mechanism. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
An eating disorder randomized clinical trial and attrition: Profiles and determinants of dropout
Authors: Stein Karen Farchaus , Wing Jeffrey , Lewis Adam , Raghunathan Trivellore
Published: April 2010

Objective:

This study sought to determine whether differential treatment effects in the targeted mechanisms of change and eating disorder (ED) symptoms are associated with patterns of attrition from a RCT.

Method:

The main study was a RCT of a psychotherapy designed to alter the non‐weight related self‐cognitions as the means to promote recovery and health in a sample of 69 women with AN or BN. Four groups based on point of dropout were compared on demographic, self‐cognitions and ED symptoms using logit and piecewise mixed effects modeling.

Results:

Attrition was highest during treatment phase but no significant predictors were found. During the measurement phase, the direction and amount of change in self‐cognition interrelatedness and body dissatisfaction differed according to point of dropout and treatment group.

Discussion:

Attention to changes both in symptoms and mediating factors that occur during treatment and follow‐up may help to identify those who are at risk for dropout and to develop strategies to promote RCT participant retention. © 2010 by Wiley Periodicals, Inc. (Int J Eat Disord 2011; 44:356–368)
1,4,7,10‐Tetraisoalkyltetracenes: Tuning of Solid‐State Optical Properties and Fluorescence Quantum Yields by Peripheral Modulation
Authors: Kitamura Chitoshi , Tsukuda Hideki , Yoneda Akio , Kawase Takeshi , Kobayashi Takashi , Naito Hiroyoshi
Published: April 2010

We have synthesized 1,4,7,10‐tetraisoalkyltetracenes from a 2,6‐naphthodiyne precursor and 2,5‐diisoalkylfurans as the starting materials (isoalkyl: isopropyl, isobutyl, and isopentyl). The tetracene molecules exhibited crystallochromy: The solid‐state colors of the isopropyl, isobutyl, and isopentyl derivatives were yellow, red, and orange‐yellow, respectively. In contrast, there were no marked differences in the optical properties of these compounds in solution. The isopropyl derivative exhibited the highest fluorescence quantum yield in the solid state of 0.90 in the series of alkylated tetracenes. X‐ray analysis revealed that there were significant structural differences in alkyl conformation and crystal packing. The crystallochromy effects are derived from the unique crystal‐packing patterns. The fluorescence quantum yields in the solid state probably depend on the relative positional relationship of the nearest neighboring molecules in one column as well as the crystal rigidity.
Evaluation of the damage by dyestuffs and NaCl on Phanerochaete chrysosporium
Authors: Gao Shang , Tao Fang , Wu Linhui , Huang Minsheng , Chen Cheng
Published: April 2010

White rot fungus, Phanerochaete chrysosporium (P. chrysosporium), is oxidizing persistent organic pollutants (POPs) including dyes. The approaches of amplified fragment length polymorphism (AFLP) analysis and transmission electron microscope (TEM) observation were carried out to evaluate DNA and cell damaged by dyestuff and NaCl of different concentrations on P. chrysosporium. According to the data of P. chrysosporium cultivation and TEM observation, the damage of NaCl on P. chrysosporium was more significant than dyestuff. In addition, UPGMA method was performed to analyze the damage on P. chrysosporium by different concentration of NaCl and dyestuff by MVSP (Version 3.1). It showed that the DNA similarity between No. 2 (100 mg/L dyestuff and 15% NaCl) and No. 3 (100 mg/L dyestuff and 8% NaCl) was 66.7% when the concentrations of dyestuff was 100 mg/L. The DNA similarity between No. 3 (100 mg/L dyestuff and 8% NaCl) and No. 4 (300 mg/L dyestuff and 8% NaCl) was 88.9% when NaCl was kept at 8%, which was higher than 66.7%. No. 5 (300 mg/L dyestuff and 15% NaCl) was the most serious group. These results showed the damage by NaCl was significantly serious than that of dyestuffs. Therefore, the concentrations of NaCl in real dyestuff wastewater should be kept within 8%, keeping the treatment efficiency. © 2010 American Institute of Chemical Engineers Environ Prog, 2010
Methane production from anaerobic–aerobic sequential system treatment of azo dye Reactive Red 24
Authors: Karatas Mustafa , Dursun Sukru , Argun Mehmet Emin
Published: April 2010

This study describes the treatment of azo dye Reactive Red 24 (RR 24) and methane production efficiency of anaerobic–aerobic sequential system. An upflow anaerobic sludge blanket and continuously stirred aerobic reactor were used to treat RR 24 dye. The effect of hydraulic retention time (HRT), organic loading rate, and sludge retention time ratio on the methane production percentage, color, and chemical oxygen demand (COD) removal was investigated. The sequential anaerobic–aerobic treatment of synthetic dye wastewater feed with 150 mg/L of RR 24 dye resulted in 100% color and 95.2% COD removal at 5.76‐day HRT. The amount of methane produced in anaerobic reactor was 563 mL/day (80% methane intotal gas) and 129 mL/day (55%) for organic loading of 2.52 and 23.53 kg COD/(m3 day), respectively. © 2010 American Institute of Chemical Engineers Environ Prog, 2011
Synthesis, crystal structure, and herbicidal activity of pyrimidinyl benzylamine analogues containing a phosphonyl group
Authors: Tang Wu , Yu Zhi‐Hua , Shi De‐Qing
Published: April 2010

A series of pyrimidinyl benzylamine analogues containing a phosphonyl group (2) was synthesized via the Mannich‐type reactions of 2‐(4,6‐dimethoxypyrimidin‐2‐yloxy)benzoaldehyde 1, aromatic amines, and dialkyl phosphites or triphenyl phosphite in the presence of Mg(ClO4)2. Their structures were characterized by spectroscopic data (infrared, 1H NMR, 31P NMR, and mass spectrometry) and elemental analyses, and compound 2b was further determined by X‐ray diffraction crystallography. The results of preliminary bioassays (in vitro) showed that most of title compounds 2 exhibited higher herbicidal activities against dicotyledonous weeds (Brassica campestris L.) than monocotyledonous weeds (Echinochloa crus‐galli). Further bioassays (in vivo) indicated that some of 2 displayed as good herbicidal activity against amaranth pigweed (Amaranthus retroflexus) as the commercially available herbicide, Bispyribac‐sodium, in both preemergence and postemergence treatments at the dose of 1.5 kg/ha. © 2010 Wiley Periodicals, Inc. Heteroatom Chem 21:148–155, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.20589
New phosphoric triamides: Chlorine substituents effects and polymorphism
Authors: Gholivand Khodayar , Oroujzadeh Nasrin , Shariatinia Zahra
Published: April 2010

New phosphoric triamides 1–10 were synthesized by the reaction of N‐2,4‐dichlorobenzoyl phosphoramidic dichloride with various cyclic aliphatic amines, and the products were characterized by 1H, 13C, 31P NMR, and IR spectroscopy and elemental analysis. Surprisingly, the 1H NMR spectra of compounds 1–7 demonstrate long‐range 4J(H,H) coupling constant from 1.5 to 1.9 Hz. Comparison of the NMR and IR spectra of N‐benzoyl, N‐4‐chlorobenzoyl, and N‐2,4‐dichlorobenzoyl phosphoric triamide analogues indicates that N‐2,4‐dichlorobenzoyl derivatives have the most upfield δ(31P) and the highest ν(CO) values. The crystal structures of 3, 4, 6, 6a, and 10 have been determined by X‐ray crystallography. Interestingly, the structures of 6 and 6a are polymorphic. All structures form dimers through strong, intermolecular PO···HN hydrogen bonds. The dimers connect to each other via weak CH···Cl and CH···OH bonds to produce two‐dimensional polymeric chains for 4 and three‐dimensional networks for others. Among new synthesized N‐2,4‐dichlorobenzoyl phosphoric triamides, one indicated polymorphism. All structures were characterized by 1H, 13C, 31P NMR, and infrared spectroscopy and elemental analysis. © 2010 Wiley Periodicals, Inc. Heteroatom Chem 21:168–180, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.20592
Efficient and Convenient Polyethylene Glycol (PEG)‐Mediated Synthesis of Spiro‐oxindoles
Authors: Mitaram Meshram Harshadas , Aravind Kumar Dachepally , Ramalinga Vara Prasad Busam , Ramesh Goud Palakuri
Published: April 2010

Polyethylene glycol (PEG) has been reported as an efficient and convenient medium for the three‐component synthesis for spiro‐oxindole.
Terpenoids from Roots of Chloranthus spicatus
Authors: Xiao Zhi‐Yong , Wang Xia‐Chang , Zhang Gui‐Ping , Huang Zhong‐Liang , Hu Li‐Hong
Published: April 2010

Five new terpenoids, including four eudesmane‐type sesquiterpenoids, 1–4, and one labdane‐type diterpenoid, 6, together with ten known compounds, were isolated from the roots of Chloranthus spicatus. The structures and their relative configurations were mainly established by 1D‐ and 2D‐NMR spectra, and MS experiments.
Synthesis and bio‐activity of alkyl/aryl [2‐(1,2,4,5‐tetrahydro‐3‐sulfanylene/selenylene naphtha[1,8][1,5,3]diazaphosphocin‐ 3‐yl)methyl amino acid esters]
Authors: Subba Reddy S. , Rao V. K. , Ravi Sankar A. U. , Raju C. N.
Published: April 2010

magnified image

Synthesis of alkyl/aryl [2‐(1,2,4,5‐tetrahydro‐3‐sulfanylene/selenylene naphtha[1,8‐f,g][1,5,3]diazaphosphocin‐3‐yl) methyl amino acid esters] (6, 7, 8, 9, 10, 11, 12, 13, 14, 15) was accomplished in three steps. 1, 8‐diamino naphthalene (2) was reacted with tris (bromomethyl) phosphine (1) in the presence of triethylamine in dry tetrahydrofuran (THF) under N2 atmosphere to form a PIII intermediate (3). It was converted to the corresponding sulfide (4) and selenide (5) by reacting with sulfur and selenium, respectively. The intermediates 4 and 5 were further reacted with amino acid esters to obtain the title compounds (6, 7, 8, 9, 10, 11, 12, 13, 14, 15). The structures of the title compounds were established by elemental analysis and spectral data (IR, 1H, 13C, 31P NMR, and FAB mass). The antimicrobial activity of these compounds was evaluated and they exhibited significant activity. J. Heterocyclic Chem., (2010).
Synthesis of crown compounds containing a 1,3,4‐oxadiazole moiety: Microwave‐assisted synthesis
Authors: Outirite Moha , Lebrini Mounim , Lagrenée Michel , Bentiss Fouad
Published: April 2010

magnified image

New macrocyclic polyether compounds containing a 2,5‐bis(2‐hydroxyphenyl)‐1,3,4‐oxadiazole moiety are quickly prepared by a nucleophilic substitution reaction involving ethylene glycol ditosylate or polyethylene glycol ditosylate and a biphenol, the 2,5‐bis(2‐hydroxyphenyl)‐1,3,4‐oxadiazole, with solid anhydrous potassium carbonate as a base under microwave irradiation (monomode and multimode). The structures of new macrocyclic polyether compounds were confirmed by 1H, 13C NMR, mass spectrometry, and elemental analysis. J. Heterocyclic Chem., (2010).
MgBr2‐mediated opening of 2,3‐three membered heterocyclic amines
Authors: Righi Giuliana , Ciambrone Simona , Esuperanzi Evelina , Montini Francesca , Pelagalli Romina
Published: April 2010

magnified image

Regio‐ and stereo‐controlled opening of 2,3‐epoxy amines and 2,3‐aziridine amines by the commercially available MgBr2 is described. As reported, this new method could represent a general and useful approach for the preparation of promising intermediates. Moreover, in particular cases, the reaction evolves toward an interesting oxazolidin‐2‐one structure. J. Heterocyclic Chem., (2010).