bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: Disappearance of Superconductivity in the Solid Solution Between (Ca4Al2O6)(Fe2As2) and (Ca4Al2O6)(Fe2P2) Superconductors.
Authors: Shirage Parasharam M. , Kihou Kunihiro , Lee Chul‐Ho , Takeshita Nao , Eisaki Hiroshi , Iyo Akira 
Published: January 2013

AbstractSuperconductivity is strongly suppressed for a wide composition range of 0.5 < x ≤ 0.95 in (Ca4Al2O6) [Fe2(As1‐xPx)2] solid solutions while the two stoichiometric compounds (Ca4Al2O6)(Fe2As2) and (Ca4Al2O6)(Fe2P2) possess relatively high critical temperatures of 28 and 17 K, respectively.
ChemInform Abstract: Characterization Study on the Promoting Effect of F‐Doping V2O5/TiO2 SCR Catalysts.
Authors: Zhao Wei , Zhong Qin , Zhang Tianjiao , Pan Yanxiao 
Published: January 2013

AbstractF‐doped V2O5/TiO2 catalysts for selective reduction of NOx by NH3 are prepared by impregnation of a titanium dioxide support with an aqueous NH4VO3 solution (reflux for 4 h, calcination at 623 K for 4 h).
ChemInform Abstract: CdTiO3 Thin Films from an Octa‐Nuclear Bimetallic Single Source Precursor by Aerosol Assisted Chemical Vapor Deposition (AACVD).
Authors: Bakar Shahzad Abu , Hussain Syed Tajammul , Mazhar Muhammad 
Published: January 2013

AbstractMesoporous, crack‐free, and crystalline CdTiO3 thin films are deposited by aerosol assisted chemical vapor deposition on a fluorine doped SnO2 coated conducting glass substrate using [Cd4Ti4(dmae)4(TFA)8 (OAc)4O6] (dmae: N,N‐dimethylaminoethanolate) as precursor.
ChemInform Abstract: Soluble Zintl Phases A14ZnGe16 (A: K, Rb) Featuring [(η3‐Ge4) Zn(η2‐Ge4)]6‐ and [Ge4]4‐ Clusters and the Isolation of [(MesCu)2(η3,η3‐Ge4)] 4‐: The Missing Link in the Solution Chemistry of Tetrahedral Group 14 Element Zintl Clusters.
Authors: Stegmaier Saskia , Waibel Markus , Henze Alexander , Jantke Laura‐Alice , Karttunen Antti J. , Faessler Thomas F. 
Published: January 2013

AbstractThe new, isotypic compounds (IV) crystallize in the orthorhombic space group Pmn21 with Z = 2 (single crystal XRD).
ChemInform Abstract: Catalytic Hydrogen Atom Transfer (HAT) for Sustainable and Diastereoselective Radical Reduction.
Authors: Gansaeuer Andreas , Klatte Max , Braendle Gerhard M. , Friedrich Joachim 
Published: January 2013

AbstractA readily available nontoxic silane is used as terminal reductant for epoxides that are opened by in situ formed bifunctional titanocene(III) hydride catalysts.
ChemInform Abstract: The Role of Cyclobutenes in Gold(I)‐Catalyzed Skeletal Rearrangement of 1,6‐Enynes.
Authors: Escribano‐Cuesta Ana , Perez‐Galan Patricia , Herrero‐Gomez Elena , Sekine Masaki , Braga Ataualpa A. C. , Maseras Feliu , Echavarren Antonio M. 
Published: January 2013

AbstractThe gold‐catalyzed rearrangement of 1,6‐ and 1,7‐enynes is studied.
ChemInform Abstract: Manganese Dioxide Supported on Aluminum Silicate: A New Reagent for Oxidation of Alcohols under Heterogeneous Conditions.
Authors: Huang Li‐Hong , Ma Yi‐Chun , Zhang Changhe , Wang Qiang , Zou Xiao‐Nan , Lou Ji‐Dong 
Published: January 2013

AbstractManganese dioxide supported on aluminum silicate selectively oxidizes both benzylic alcohols and cinnamyl alcohol to the corresponding aldehydes and ketones, respectively.
ChemInform Abstract: Stereoselective Arylation of Substituted Cyclopentenes by Substrate‐Directable Heck—Matsuda Reactions: A Concise Total Synthesis of the Sphingosine 1‐Phosphate Receptor (S1P1) Agonist VPC01091.
Authors: Oliveira Caio C. , dos Santos Emerson A. F. , Bormio Nunes Julia H. , Correia Carlos Roque D. 
Published: January 2013

AbstractPd‐catalyzed treatment of the cyclopentene (I) with various arenediazonium borates results in efficient and stereoselective formation of products of type (III).
ChemInform Abstract: A Ligand‐Free and Base‐Free Copper‐Catalyzed Reaction: Arylation of Ammonia and Primary Amines as Their Acetate Salts.
Authors: Siddegowda Maravanahalli S. , Yathirajan Hemmige S. , Ramakrishna Ramesha A. 
Published: January 2013

AbstractReaction of haloarenes with ammonium acetate or acetates of primary amines, generated in situ, provides the corresponding aromatic amines.
ChemInform Abstract: A Facile Synthesis of Indolo[3,2,1‐jk]carbazoles via Palladium‐Catalyzed Intramolecular Cyclization.
Authors: Lv Jun , Liu Qiancai , Tang Jie , Perdih Franc , Kanjc Kristof 
Published: January 2013

AbstractA novel approach to the title compounds (II), required as electron‐donating components in material chemistry, is developed via C—X/C—H coupling of N‐(2‐bromoaryl)‐substituted carbazoles.
ChemInform Abstract: Facile Synthesis of 2‐Pyrazolines and α,β‐Diamino Ketones via Regioselective Ring‐Opening of Hydrazone‐Tethered Aziridines.
Authors: Zhang Zhen , Wang De , Wei Yin , Shi Min 
Published: January 2013

AbstractThe simple protocol to access racemic and non‐racemic 2‐pyrazolines (II), (IV) and α,β‐diamino ketones (VI) through a regioselective SN2‐type ring‐opening of title compounds (I), (III) and (V) is described.
ChemInform Abstract: Synthesis of Important β‐Functionalized 5‐Methyl‐1H‐pyrazol‐3‐ol Derivatives in the Presence of γ‐Alumina Catalyst in Aqueous Medium.
Authors: Rohman Md. Rumum , Mecadon Hormi , Khan Abu T. , Myrboh Bekington 
Published: January 2013

AbstractThe efficient four‐component synthesis of the title compounds involves condensation of ethyl acetoacetate with hydrazine and in situ coupling of the resulting pyrazole with ethyl cyanoacetate and aldehydes.
ChemInform Abstract: Preparation of Azidoaryl‐ and Azidoalkyloxazoles for Click Chemistry.
Authors: Loner Catherine M. , Luzzio Frederick A. , Demuth Donald R. 
Published: January 2013

AbstractAminative heterocyclization of azido‐substituted esters with ammonium acetate in acetic acid gives the title compounds (II), required for biological evaluation in biofilm inhibition.
ChemInform Abstract: A Novel and Facile Approach for Synthesis of 5‐Amino‐7‐aryl‐6‐cyano‐4H‐pyrano[3,2‐b]pyrroles
Authors: Sandaroos Reza , Damavandi Saman 
Published: January 2013

Abstractvia Fe(III)‐catalyzed one‐pot, three‐component reactions of 3‐hydroxyindole (I), various aromatic aldehydes (II), and malononitrile
ChemInform Abstract: Regioselective Palladium‐Catalyzed Direct Cross‐Coupling of Coumarins with Simple Arenes.
Authors: Min Minsik , Hong Sungwoo 
Published: January 2013

AbstractA novel method for the C4‐regiocontrolled oxidative cross‐coupling of coumarins (I) and unactivated arenes (II) via a Pd‐catalyzed twofold C—H functionalization is described.
ChemInform Abstract: Organocatalyzed Stereoselective Construction of N‐Formylpiperidines via a Michael‐Aza‐Henry‐Hemiaminalization Reaction Cascade.
Authors: Chawla Ruchi , Rai Ankita , Singh Atul K. , Yadav Lal Dhar S. 
Published: January 2013

AbstractThe method includes formation of 2 C—C bonds and 1 C—N bond to produce the target compounds with 5 contiguous chiral centers.
ChemInform Abstract: Facile and Efficient Synthesis of Quinolin‐2(1H)‐ones via Cyclization of Penta‐2,4‐dienamides Mediated by H2SO4.
Authors: Liu Xu , Xin Xin , Xiang Dexuan , Zhang Rui , Kumar Santosh , Zhou Fenguo , Dong Dewen 
Published: January 2013

AbstractThe reaction proceeds via formation of a dicationic superelectrophile followed by intramolecular nucleophilic cyclization.
ChemInform Abstract: A Three Component One‐Pot Synthesis and Biological Studies of Some New Octahydroacridine‐1,8‐dione Derivatives Containing Tetrazolo[1,5‐a]quinoline Moiety.
Authors: Bhuva Sandip V. , Patel Manish P. 
Published: January 2013

AbstractAll synthesized compounds are screened for their antimicrobial and anti‐tubercular activities.
ChemInform Abstract: Nanomagnetically Modified Sulfuric Acid (γ‐Fe2O3@SiO2‐OSO3H): An Efficient, Fast, and Reusable Green Catalyst for the Ugi‐Like Groebke—Blackburn—Bienayme Three‐Component Reaction under Solvent‐Free Conditions.
Authors: Rostamnia Sadegh , Lamei Kamran , Mohammadquli Mohsen , Sheykhan Mehdi , Heydari Akbar 
Published: January 2013

AbstractReaction of 2‐aminopyridines or 2‐aminothiazole with aldehydes and isonitriles under optimized conditions renders possible a mild and efficient access to biologically interesting heterocyclic systems.
ChemInform Abstract: A Facile Approach for the Synthesis of 3,4‐Dihydropyrimidin‐2‐(1H)‐ones Using a Microwave Promoted Biginelli Protocol in Ionic Liquid.
Authors: Dadhania Abhishek N. , Patel Vaibhav K. , Raval Dipak K. 
Published: January 2013

AbstractA carboxy functionalized ionic liquid is an efficient and green catalyst for the one‐pot three‐component synthesis of title compounds (IV).
ChemInform Abstract: New Pyrimidinone and Fused Pyrimidinone Derivatives as Potential Anticancer Chemotherapeutics.
Authors: Rashad Aymn E. , Shamroukh Ahmed H. , Yousif Nabil M. , Salama Mowafia A. , Ali Hatem S. , Ali Mamdouh M. , Mahmoud Abeer E. , El‐Shahat Mahmoud 
Published: January 2013

AbstractA series of new pyrimidinone derivatives is synthesized starting from oxiranyl aryl ketone (I).
ChemInform Abstract: Caryl—Calkyl Bond Formation from Cu(ClO4)2‐Mediated Oxidative Cross Coupling Reaction Between Arenes and Alkyllithium Reagents Through Structurally Well‐Defined Ar—Cu(III) Intermediates.
Authors: Wang Zu‐Li , Zhao Liang , Wang Mei‐Xiang 
Published: January 2013

AbstractThe stable and structurally well‐defined Ar—Cu(III) species (I), generated almost quantitatively via reaction of corresponding azacalixarenepyridines with Cu(ClO4)2 under aerobic conditions, smoothly react with various alkyllithium reagents furnishing alkylation products (III).
ChemInform Abstract: Enantioselective Synthesis of 2,5‐Dihydrobenzo[b]azepine Derivatives via Iridium‐Catalyzed Asymmetric Allylic Amination with 2‐Allylanilines and Ring‐Closing‐Metathesis Reaction.
Authors: Ye Ke‐Yin , Dai Li‐Xin , You Shu‐Li 
Published: January 2013

AbstractAsymmetric allylic amination of allylic carbonates (II) and (VIII) with o‐allylanilines (I) provides access towards N‐allylamines as branched isomers (III) and (IX), resp., with high to excellent regio‐ (90:10 ‐ 99:1) and enantioselectivity (up to 99% e.e.).
ChemInform Abstract: Au/SiO2 as a Highly Active Catalyst for the Selective Oxidation of Silanes to Silanols.
Authors: Li Wanjun , Wang Aiqin , Yang Xiaofeng , Huang Yanqiang , Zhang Tao 
Published: January 2013

AbstractAn Au/SiO2 catalyst with highly dispersed Au‐nanoparticles is prepared.
ChemInform Abstract: Application of the Lithiation—Borylation Reaction to the Rapid and Enantioselective Synthesis of the Bisabolane Family of Sesquiterpenes.
Authors: Aggarwal Varinder K. , Ball Liam T. , Carobene Simon , Connelly Rickki L. , Hesse Matthew J. , Partridge Benjamin M. , Roth Philippe , Thomas Stephen P. , Webster Matthew P. 
Published: January 2013

AbstractStarting materials (I) and (V) are prepared from the corresponding ketones by means of Noyori′s transfer‐hydrogenation procedure.
ChemInform Abstract: Briarenolides H and I: New 8‐Hydroxybriarane Diterpenoids from a Formosan Octocoral Briareum sp. (Briareidae).
Authors: Su Yin‐Du , Hwang Tsong‐Long , Lin Nai‐Cheng , Chen Yung‐Husan , Wu Yang‐Chang , Sheu Jyh‐Horng , Sung Ping‐Jyun 
Published: January 2013

AbstractTwo new 8‐hydroxybriarane diterpenoids, briarenolide H (I) and I (II), are isolated.
ChemInform Abstract: Catalytic Asymmetric Mannich Reaction of Glycine Schiff Bases with α‐Amido Sulfones as Precursors of Aliphatic Imines.
Authors: Hernando Elier , Gomez Arrayas Ramon , Carretero Juan C. 
Published: January 2013

AbstractA general Cu(I)‐FeSulphos‐catalyzed Mannich reaction of glycinate Schiff bases (II) with imines generated in situ from α‐amido sulfones (I) and (IV) is described.
ChemInform Abstract: Discovery of Triazolopyrimidine‐Based PDE8B Inhibitors: Exceptionally Ligand‐Efficient and Lipophilic Ligand‐Efficient Compounds for the Treatment of Diabetes.
Authors: DeNinno Michael P. , et al. et al. 
Published: January 2013

AbstractA high throughput screening hit is deconstructed to optimize for ligand efficiency against PDE8B.
Zeolithe selbst gemacht!
Authors: Nick Sabine , Chomicz Zuzanna 
Published: January 2013

AbstractDer Beitrag diskutiert am Beispiel der Zeolithe die Thematisierung moderner Materialien in der Schule. Nach einem Überblick über den strukturellen Aufbau und die strukturellen Baueinheiten von Zeolithe, werden die Synthesen zweier Zeolithe vorgestellt, welche ausgehend von einfachen Grundchemikalien und ohne großen apparativen Aufwand in einer solvothermal‐ähnlichen Reaktionsführung gelingen. Weiterhin werden Hinweise zur Analytik der Produkte gegeben und mögliche Folgeexperimente beschrieben.
Bildung für eine nachhaltige Entwicklung (BnE) in der Chemielehrerbildung
Authors: Burmeister Mareike , Eilks Ingo 
Published: January 2013

AbstractDieser Aufsatz beschreibt die Entwicklung eines Teilmoduls über Bildung für eine nachhaltige Entwicklung (BnE) für die universitäre Ausbildung von Chemielehrkräften. Das Teilmodul wurde durch Partizipative Aktionsforschung, ausgehend von theoretischen Konzepten der BnE und empirischen Untersuchungen zum Kenntnisstand von Lehramtsstudierenden und Referendaren, gestaltet und zyklisch entwickelt. Dieser Aufsatz diskutiert diese Entwicklung, stellt die Struktur des Teilmoduls vor und berichtet über Erfahrungen bei der Umsetzung.This paper presents the development of a university chemistry teacher education module on Education for Sustainable Development (ESD). The module was cyclically developed and refined by Participatory Action Research on the base of a theoretical analysis of the literature and empirical investigation on the existing knowledge base of student teachers and teacher trainees. The paper discusses the process of development, presents the structure of the module, and reports experiences from its implementation.
Ester als Duftstoffe, rein synthetisch aus dem Labor
Authors: Aydemir Ibrahim , Firneis Christian , Trauschke Mathias 
Published: January 2013

AbstractIm Rahmen eines Seminarfaches an einem niedersächsischen Gymnasium wurde das Thema „Ester als Duftstoffe“ durch eine Schülergruppe bearbeitet. Ihr Ziel war es, hochreine Ester unter Schulbedingungen herzustellen, um sie dann durch einen sensorischen Test durch Mitschüler überprüfen zu lassen. Der folgende Beitrag ist eine Gemeinschaftsarbeit von Schülern und dem betreuenden Lehrer.
Theoretical Study on the Rectifying Performance of Organoimido Derivatives of Hexamolybdates
Authors: Wen Shizheng , Yang Guochun , Yan Likai , Li Haibin , Su Zhongmin 
Published: January 2013

AbstractWe design a new type of molecular diode, based on the organoimido derivatives of hexamolybdates, by exploring the rectifying performances using density functional theory combined with the non‐equilibrium Green’s function. Asymmetric current–voltage characteristics were obtained for the models with an unexpected large rectification ratio. The rectifying behavior can be understood by the asymmetrical shift of the transmission peak observed under different polarities. It is interesting to find that the preferred electron‐transport direction in our studied system is different from that of the organic D‐bridge‐A system. The results show that the studied organic–inorganic hybrid systems have an intrinsically robust rectifying ratio, which should be taken into consideration in the design of the molecular diodes.
FPGA‐based embedded platform for fiber optic gyroscope signal denoising
Authors: Peesapati Rangababu , Sabat Samrat L. , K. P. Karthik , M. Narasimhappa , N. Giribabu , Nayak J. 
Published: January 2013

SUMMARYThis paper presents System on Chip (SoC) implementation of a proposed denoising algorithm for fiber optic gyroscope (FOG) signal. The SoC is developed using an Auxillary Processing Unit of the proposed algorithm and implemented in the Xilinx Virtex‐5‐FXT‐1136 field programmable gate array. SoC implementation of this application is first of its kind. The proposed algorithm namely adaptive moving average‐based dual‐mode Kalman filter (AMADMKF) is a hybrid of adaptive moving average and Kalman filter (KF) technique. The performance of the proposed AMADMKF algorithm is compared with the discrete wavelet transform and KF of different gains. Allan variance analysis, standard deviation and signal to noise ratio (SNR) are used to measure the efficiency of the algorithm. The experimental result shows that AMADMKF algorithm reduces the standard deviation or drift of the signal by an order of 100 and improves the SNR approximately by 80 dB. The Allan variance analysis result shows that this algorithm also reduces different types of random errors of the signal significantly. The proposed algorithm is found to be the best suited algorithm for denoising the FOG signal in both the static and dynamic environments. Copyright © 2013 John Wiley & Sons, Ltd.
A low‐power, area‐efficient multichannel receiver for micro MRI
Authors: Dehkhoda Fahimeh , Frounchi Javad , Al‐Sarawi Said 
Published: January 2013

SUMMARYA new integrated, low‐noise, low‐power, and area‐efficient multichannel receiver for magnetic resonance imaging (MRI) is described. The proposed receiver presents an alternative technique to overcome the use of multiple receiver front‐ends in parallel MRI. The receiver consists of three main stages: low‐noise pre‐amplifier, quadrature down‐converter, and a band pass filter (BPF). These components are used to receive the nuclear magnetic resonance signals from a 3 × 3 array of micro coils. These signals are combined using frequency domain multiplexing (FDM) method in the pre‐amplifier and BPF stages, then amplified and filtered to remove any out‐of‐band noise before providing it to an analog‐to‐digital converter at the low intermediate frequency stage. The receiver is designed using a 90 nm CMOS technology to operate at the main B0 magnetic field of 9.4 T, which corresponds to 400 MHz. The receiver has an input referred noise voltage of 1.1 nV/√Hz, a total voltage gain of 87 dB, a power consumption of 69 mA from a 1 V supply voltage, and an area of 305 µm × 530 µm including the reference current and bias voltage circuits. Copyright © 2013 John Wiley & Sons, Ltd.
Inter‐ELM Ion Transport in the ASDEX Upgrade Far Scrape‐Off Layer
Authors: Kočan M. , Allan S. Y , Carpentier‐Chouchana S. , de Marné P. , Elmore S. , P. Gunn J. , Herrmann A. , Kirk A. , Kubič M. , Lunt T. , W. Müller H. , Pitts R. A. , Rohde V. , the ASDEX Upgrade Team  
Published: January 2013

AbstractNew measurements of ion transport in the scrape‐off layer (SOL) during inter‐ELM periods are obtained from a retarding field analyzer (RFA) in the ASDEX Upgrade tokamak. The ion current density measured in the far SOL features large‐amplitude bursts associated with turbulent plasma filaments passing the RFA. These filaments convect plasma to the wall with larger density than the background plasma density. The ions in the filament also have higher impact energies than the background ion impact energies. These observations indicate that a filament‐wall interaction can lead to erosion of the first wall in the burning plasma tokamaks such as ITER (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Triple Probe Measurements Benchmarked by Interferometry in a Pulsed‐Power Plasma
Authors: Mackel F. , Kempkes P. , Tenfelde J. , Ridder S. , Soltwisch H. 
Published: January 2013

AbstractAn electrostatic triple probe was employed to investigate electron densities in a pulsed‐power discharge plasma. The inherent property of electrostatic probes to disturb the plasma is one of the major problems of these diagnostics. The quantification of the systematic error is not straightforward. In order to get non‐intrusive and reliable measurements, a CO2 laser interferometer was set up to determine line integrated‐electron densities. The data are converted into electron number densities by assuming a parabolic density distribution across the plasma column. In a comparison, the triple probe underestimates the electron density (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Determination of the Electron Energy Distribution Function From Langmuir Probe Characteristics Using Non‐Recursive Digital Filters
Authors: Hannemann M. 
Published: January 2013

AbstractThe energy distribution, the mean energy and the density of the electrons of low pressure plasmas may be obtained from the 2nd derivative of a Langmuir probe characteristic. Often numerical methods are used for differentiation. A simple numerical technique is the non‐recursive digital or FIR filtering. Because of noise this process has to comprise also smoothing elements. The best way to achieve this is the successive use of a weakly smoothing interpolation based twofold differentiating filter and a strong smoothing filter. None of the usual smoothing filters exhibits all properties needed in the evaluation of probe characteristics. Window function based FIR filters represent a class of smoothing filters which is especially suited in this context because of its increasing stop band attenuation. A new smoothing filter based on a new parameterized window function is introduced. The testing of this new filter is performed and hints for finding of the filter parameters are given (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Interfacial Synthesis of Free‐Standing Metal–Organic Framework Membranes
Authors: Lu Hongyu , Zhu Shiping 
Published: January 2013

AbstractA method based on a liquid–liquid interfacial coordination mechanism has been developed for the synthesis of free‐standing metal–organic framework (MOF) membranes. MOF precursors, zinc nitrate [Zn(NO3)2] and terephthalic acid (TPA or H2BDC), as well as catalyst triethylamine (TEA), were dissolved in two immiscible solvents, dimethylformamide (DMF) and hexane. The reaction of Zn(NO3)2 and TPA (at a 2:1 molar ratio) in DMF was catalyzed by TEA in hexane at the solvent interface thus forming a free‐standing membrane. A region of reactant concentrations critical to membrane formation was identified; a free‐standing membrane could only be formed in the region of high Zn/TPA and low TEA concentrations. The combination of low Zn/TPA and high TEA concentrations yielded MOF particles that precipitated from DMF. The membranes were characterized by SEM and XRD and found to be asymmetric. SEM results showed that the top layer was particulate, whereas the bottom layer had a sheet‐like morphology, which was further revealed by XRD data as 3D Zn4O(BDC)3 (also known as MOF‐5) and 2D ZnBDC·DMF (MOF‐2) for the top and bottom, respectively. Other transitional zinc–carboxylate structures between the two MOFs, namely Zn3(OH)2(BDC)2 (MOF‐69c) and Zn5(OH)4(BDC)3, were also observed with small signal intensities revealing a transition of coordination modes between zinc ions and BDC groups from 3D to 2D at the membrane cross‐section. This was caused by a change of the TEA diffusion rate during the synthesis process, which might change the pH and alter the membrane growth. From both SEM and XRD characterizations, MOF‐2 is the dominant material in the overall composition. Nitrogen adsorption tests showed an average Langmuir surface area of 709 m2/g for the membrane, demonstrating its potential for gas separation applications.