bluuebunny/crossref_metadata_2025_split huggingface dataset:
Acetylation of dendrimer‐entrapped gold nanoparticles: Synthesis, stability, and X‐ray attenuation properties
Authors: Peng Chen , Wang Han , Guo Rui , Shen Mingwu , Cao Xueyan , Zhu Meifang , Zhang Guixiang , Shi Xiangyang 
Published: August 2010

AbstractFunctionalized dendrimer‐entrapped gold nanoparticles (Au DENPs) are of scientific and technological interest in biomedical applications. In this study, Au DENPs prepared with amine‐terminated generation 5 (G5) poly(amido amine) dendrimers as templates were subjected to acetylation to neutralize the positive surface charge of the particles. By varying the molar ratio of Au salt to G5 dendrimer, we prepared acetylated Au DENPs with a size range of 2–4 nm. Meanwhile, we attempted to add glucose to the dialysis liquid of the acetylated Au DENPs to prevent possible particle aggregation after lyophilization. The acetylated Au DENPs with different compositions (Au salt/dendrimer molar ratios) were characterized with 1H‐NMR, transmission electron microscopy, ultraviolet–visible (UV–vis) spectrometry, and ζ‐potential measurements. We show that when the molar ratio of Au salt to dendrimer was equal to or larger than 75:1, the acetylated Au DENPs showed a significant aggregation after lyophilization, and the addition of glucose was able to preserve the colloidal stability of the particles. X‐ray absorption measurements showed that the attenuation of the acetylated Au DENPs was much higher than that of the iodine‐based contrast agent at the same molar concentration of the active element (Au vs iodine). In addition, the acetylated Au DENPs enabled X‐ray computed tomography (CT) imaging of mice after intravenous injection of the particles. These findings suggest a great potential for acetylated Au DENPs as a promising contrast agent for CT imaging applications. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
Preparation, characterization, and properties of environmentally friendly waterborne poly(urethane acrylate)/silica hybrids
Authors: Wu Dongmei , Qiu Fengxian , Xu Heping , Zhang Jingli , Yang Dongya 
Published: August 2010

AbstractA series of environmentally friendly waterborne poly(urethane acrylate) (WPUA)/silica (SiO2) hybrids were synthesized by a sol–gel process on the basis of isophorone diisocyanate, polyester polyol (GE‐210), dimethylpropionic acid, butyl acrylate and methyl methacrylate monomers, tetraethoxysilane (TEOS), and 3‐glycidyloxypropyl trimethoxysilane (GLYMO) as a coupling agent. The mechanical properties of the WPUA/SiO2 hybrids were investigated through tensile and hardness tests. Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, atomic force microscopy, and X‐ray diffraction were used to assess the fracture surface morphology and the dispersions of the WPUA/SiO2 hybrids. The strength and hardness values of the WPUA/SiO2 hybrids were improved significantly. This was attributed to the synergistic effect of WPUA, GLYMO, and TEOS. The results show that SiO2 particles of the membranes had a uniform dispersion and formed an excellent interfacial bonding layer on their surfaces. The prepared hybrids showed good thermal stability and mechanical properties in comparison with pure WPUA and showed tunable transparence with the SiO2 fraction in the film. Through suitable adjustment of the TEOS content, some thin hybrids have potential applications as specialty materials. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
A fast method to assess the composition of a polyolefin: An application to compliance testing of food contact materials
Authors: Gillet Guillaume , Vitrac Olivier , Desobry Stéphane 
Published: August 2010

AbstractFor plastics materials intended to be in contact with food, recent EU regulations, 72/2002/EC and 1935/2004/EC, enforce the assessment of the migration of 502 substances of the 932 positively listed substances. As mathematical modeling has been proposed to overcome such considerable effort in particular by providing maximum acceptable concentrations in the formulation, the compliance testing problem is efficiently reduced to the identification of substances and to their extent in initial materials. This work examines a fast identification and quantification procedure based on a semisupervised deconvolution procedure of FTIR spectra of polymer extracts in dichloromethane. The inversion procedure was implemented as a Tikhonov least‐square problem and designed to work on large and open dictionary of substances by combining both spectra of reference additives and normalized responses of typical chemical functions. The sparsity of the overall solution was fulfilled with non‐negativity constraints, while traces were detected by an iterative reweighting and stochastic resonance. The whole methodology was calibrated onto 21 typical additives of polyolefins and satisfactory tested on numerical examples and on extracts of processed films in high‐density polyethylene including up to eight unknown compounds. Maps of possible confusions and biases were generated for all tested substances. The mass balance laws for molecules belonging to similar classes of additives were particularly highlighted. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
Probing Surface Sites of TiO2: Reactions with [HRe(CO)5] and [CH3Re(CO)5]
Authors: Lobo‐Lapidus Rodrigo J. , Gates Bruce C. 
Published: August 2010

AbstractTwo carbonyl complexes of rhenium, [HRe(CO)5] and [CH3Re(CO)5], were used to probe surface sites of TiO2 (anatase). These complexes were adsorbed from the gas phase onto anatase powder that had been treated in flowing O2 or under vacuum to vary the density of surface OH sites. Infrared (IR) spectra demonstrate the variation in the number of sites, including Ti+3OH and Ti+4OH. IR and extended X‐ray absorption fine structure (EXAFS) spectra show that chemisorption of the rhenium complexes led to their decarbonylation, with formation of surface‐bound rhenium tricarbonyls, when [HRe(CO)5] was adsorbed, or rhenium tetracarbonyls, when [CH3Re(CO)5] was adsorbed. These reactions were accompanied by the formation of water and surface carbonates and removal of terminal hydroxyl groups associated with Ti+3 and Ti+4 ions on the anatase. Data characterizing the samples after adsorption of [HRe(CO)5] or [CH3Re(CO)5] determined a ranking of the reactivity of the surface OH sites, with the Ti+3OH groups being the more reactive towards the rhenium complexes but the less likely to be dehydroxylated. The two rhenium pentacarbonyl probes provided complementary information, suggesting that the carbonate species originate from carbonyl ligands initially bonded to the rhenium and from hydroxyl groups of the titania surface, with the reaction leading to the formation of water and bridging hydroxyl groups on the titania. The results illustrate the value of using a family of organometallic complexes as probes of oxide surface sites.
Surprising Properties of a Furo‐Furanone
Authors: Calzaferri Gion , Brühwiler Dominik , Meng Tao , Dieu Le‐Quyenh , Malinovskii Vladimir L. , Häner Robert 
Published: August 2010

AbstractThe electronic absorption, fluorescence, and excitation spectra of furo[3,4‐c]furanone (1) have been measured in different solvents at different concentrations. We observed a complex dependence of absorption and excitation spectra as a function of the concentration in CH2Cl2 and THF due to aggregate formation. Interestingly, the fluorescence spectra were not affected. Resolving the puzzle was made possible by the fact that 1 fits perfectly into the channels of zeolite L (ZL) microcrystals to form 1–ZL guest–host composites. The geometry of the ZL channel system ensures a well‐defined orientation of the embedded dye molecules, thereby leading to a preferred orientation of their electronic transition dipole moment (ETDM) and thus to objects with pronounced optical anisotropy properties. This enabled us to understand that in solution the monomers that are present at low concentration form an aggregate in which the molecules sit on top of each other and arrange into a J‐type aggregate configuration at higher concentrations. The signature of the latter is observed in the 1–ZL composites. This seems to be the first example in which the insertion of molecules into a nanochannel microcrystal has helped in understanding the weak intermolecular interactions that take place in solution.
Reverse‐Vesicle Formation of Organic–Inorganic Polyoxometalate‐Containing Hybrid Surfactants with Tunable Sizes
Authors: Zhang Jie , Song Yu‐Fei , Cronin Leroy , Liu Tianbo 
Published: August 2010

AbstractThe formation of reverse‐vesicular structures of the polyoxometalate‐containing hybrid surfactants [nBu4N]3[MnMo6O18{(OCH2)3CNHCO(CH2)n−2CH3}2] (Mn‐Anderson‐Cn, n=6, 16) in nonpolar medium was achieved by titrating toluene into Mn‐Anderson‐Cn/acetonitrile (MeCN) solution. Stepwise change of the solvent polarity induces self‐association of the hydrophilic Mn‐Anderson cluster on the hybrid amphiphiles. The reverse‐vesicle formation was characterized by laser light scattering and further confirmed by transmission electron microscopy techniques, and the vesicle sizes increase with increasing toluene contents. The assembly process was accelerated at an elevated temperature. The length of the alkyl tails on the hybrid surfactants has a minor effect on the vesicle sizes, because the strong attraction between the polyoxometalate clusters is more dominant in the reverse‐vesicle formation.
In and Ex Situ Studies of the Formation of Layered Microspherical Hydrozincite as Precursor for ZnO
Authors: Bitenc Marko , Podbršček Peter , Dubček Pavo , Bernstorff Sigrid , Dražić Goran , Orel Bojan , Pejovnik Stane , Crnjak Orel Zorica 
Published: August 2010

AbstractLayered ZnO microspheric particles were prepared by the thermal decomposition of layered hydrozincite (LZnHC), which was synthesized from zinc nitrate and urea in a water/PEG400 mixture. The influence of the starting reagents, their concentrations, and the amount of PEG in the water/PEG400 mixture on the particle growth was observed. The chemical aspect of the particle growth was proposed in the frame of the partial charge model (PCM), and the formation of [Zn(OH)2(OH2)4]0 and [Zn(OH)(HCO3)(OH2)3]0 was predicted for the solid phase. The assumed growth mechanism, which follows the “nonclassical crystallization” concept of a self‐assembling mechanism, was observed in situ by small‐angle X‐ray scattering (SAXS) and predicts the rapid formation of approximately 6 nm sized building units. The size of these nano building units, stable only in the reaction medium, remains nearly constant during the synthesis, as the concentration of the nano building units increases throughout the reaction. The nano building units connect into leaves of LZnHC with a thickness of 20 nm. These leaves of LZnHC are further agglomerated into porous, microsphere‐like particles with sizes up to 4 μm.
ChemInform Abstract: X‐Ray Crystallographic Study of Ce2Si2O7.
Authors: CHRISTENSEN A. N. , HAZELL R. G. 
Published: August 2010

AbstractChemInform 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 Structure of the Low‐Temperature A‐Type Modification of Pr2O3 from X‐Ray Powder and Electron Single Crystal Diffraction.
Authors: GREIS O. , ZIEL R. , BREIDENSTEIN B. , HAASE A. , PETZEL T. 
Published: August 2010

AbstractChemInform 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: Single‐Crystal X‐Ray Structure Determination of Neptunium Tetrachloride.
Authors: SPIRLET M.‐R. , JEMINE X. , GOFFART J. 
Published: August 2010

AbstractChemInform 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: Magnetic Structure of TbMn6Ge6 from Neutron Diffraction Study.
Authors: VENTURINI G. , CHAFIK EL IDRISSI B. , RESSOUCHE E. , MALAMAN B. 
Published: August 2010

AbstractChemInform 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: Preparation, Structure, and Electronic Properties of Ca11MSb9 (M: Al, Ga, In).
Authors: YOUNG D. M. , KAUZLARICH S. M. 
Published: August 2010

AbstractChemInform 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: Mass Spectral Investigation on Some Substituted 4‐Aminooxanes.
Authors: SELVARAJ K. , CHANDRASEKARA N. , RAMARAJAN K. 
Published: August 2010

AbstractChemInform 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: Benzyltriphenyllead and Dibenzyldiphenyllead.
Authors: FAHRENKAMPF U. , SCHUERMANN M. , HUBER F. 
Published: August 2010

AbstractChemInform 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: Structural Investigation of Some Lactides.
Authors: BOLTE M. , BECK H. , NIEGER M. , EGERT E. 
Published: August 2010

AbstractChemInform 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: Two Octahydroacridines.
Authors: FROEHLICH R. , GREHL M. , KRAMM‐GLADE S. , LASCHAT S. 
Published: August 2010

AbstractChemInform 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: Syntheses and Theoretical Studies of Exocyclic γ‐ Oxoalkenyltrimethylsilanes. An Approach to the Stereodefined Exocyclic Tetrasubstituted Alkenes.
Authors: NAKATANI K. , IZAWA T. , ISOE S. 
Published: August 2010

AbstractChemInform 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: Diastereoselective Hydrogenations of α‐(2′,3′,4′,6′‐Tetra‐O‐ acetyl‐β‐D‐glucopyranosyloxymethylene) Carboxylic Esters: A Route to Stereopure Aldol Derivatives.
Authors: LARSEN D. S. , SCHOFIELD A. , STOODLEY R. J. , TIFFIN P. D. 
Published: August 2010

AbstractChemInform 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: Cycloaddition of Maleic Anhydride to Isobutylidene Imines.
Authors: DRABER W. , BORN L. 
Published: August 2010

AbstractChemInform 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: Kinetics of the 1,5‐Dipolar Cyclization of 2‐Vinylpyridinium Ylides to Indolizines. Determination of Rate Parameters by Laser Flash Photolysis.
Authors: LIU M. T. H. , ROMASHIN Y. N. , BONNEAU R. 
Published: August 2010

AbstractChemInform 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 Synthetic Method for 2‐Silyl‐thiacycloalk‐2‐enes (II) of Different Ring Size by Intramolecular Cyclization Through Silyl Thiones.
Authors: BONINI B. F. , COMES‐FRANCHINI M. , MAZZANTI G. , RICCI A. , ROSA‐FAUZZA L. , ZANI P. 
Published: August 2010

AbstractChemInform 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 Rearrangement of 2,4‐Diphenyl‐3‐azabicyclo(3.3.1)nonan‐9‐one Leading to 8,10‐Diphenyl‐1,9‐diazabicyclo(5.3.0)decan‐2‐one.
Authors: JEYARAMAN R. , SENTHILKUMAR U. P. 
Published: August 2010

AbstractChemInform 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: Oxidation of Disulfides with Hydrogen Peroxide under Phase‐Transfer Catalytic Conditions.
Authors: ANISIMOV A. V. , AKHMAD M. R. , TARAKANOVA A. V. , BORISENKOVA S. A. 
Published: August 2010

AbstractChemInform 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: Asymmetric Reactions Catalyzed by Chiral Metal Complexes. Part 62. Efficient Asymmetric Hydrogenation of Imines Catalyzed by a Neutral Iridium(I) Complex of (4R,5R)‐MOD‐DIOP.
Authors: MORIMOTO T. , NAKAJIMA N. , ACHIWA K. 
Published: August 2010

AbstractChemInform 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 Mild and Convenient Reduction of Aromatic and Heteroaromatic Aldoximes with Ammonium Formate/Pd.
Authors: KACZMAREK L. , BALICKI R. 
Published: August 2010

AbstractChemInform 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 Easy and Efficient Synthesis of Iodohydrins from Alkenes.
Authors: DE MATTOS M. C. S. , SANSEVERINO A. M. 
Published: August 2010

AbstractChemInform 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: Reaction of Six‐Membered Azaaromatics with Allyltributyltin.
Authors: ITOH T. , HASEGAWA H. , NAGATA K. , MATSUYA Y. , OKADA M. , OHSAWA A. 
Published: August 2010

AbstractChemInform 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: Monoamination of Internal Fluoroolefins.
Authors: ZEIFMAN YU. V. , GERMAN L. S. 
Published: August 2010

AbstractChemInform 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 Useful Route to Both Enantiomers of 1‐Amino‐2‐alkanols: Synthesis of 1‐Amino‐3‐methyl‐2‐butanol from Valine.
Authors: KOPPENHOEFER B. , TRETTIN U. , WAECHTLER A. 
Published: August 2010

AbstractChemInform 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 Formation of Three Carbon‐Carbon Bonds by Cascade Reaction with Enolate Anion: Synthesis of Tricyclo(6.2.2.01,6)dodecane and Tricyclo(5.3.1.03,8)undecane Derivatives.
Authors: IHARA M. , MAKITA K. , TOKUNAGA Y. , FUKUMOTO K. 
Published: August 2010

AbstractChemInform 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: O‐(ω‐(Dialkylamino)alkyl)oximes of (+)‐1,7,7‐Trimethylbicyclo(2. 2.1)heptan‐2‐one with Hypotensive, Antiinflammatory, Analgesic, Local Anesthetic and Other Activities.
Authors: SCHENONE S. , BRUNO O. , RANISE A. , BONDAVALLI F. , D'AMICO M. , VACCA C. , FALCIANI M. , FILIPPELLI A. 
Published: August 2010

AbstractChemInform 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 Bis(difluoronitroacetoxy)iodoarenes
Authors: UVAROV V. I. , BREL' V. K. 
Published: August 2010

AbstractChemInform 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.