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5.903 Aktuelle Fachpublikationen zum Thema temperature

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Low-Temperature Synthesis of Homogeneous Solid Solutions of Scheelite-Structured Ca1-xSrxWO4 and Sr1-xBaxWO4 Nanocrystals

29.07.2015 | Sean P Culver; Matthew J. Greaney; Antonio Tinoco; Richard L. Brutchey, Dalton Transactions, 2015

A series of compositionally complex scheelite-structured nanocrystals of the formula A1-xA´xWO4 (A = Ca, Sr, Ba) have been prepared under benign synthesis conditions using the vapor diffusion sol-gel method. Discrete nanocrystals with sub-20 nm mean diameters were obtained after kinetically ...

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Compressibility and structural stability of spinel-type MnIn2O4

26.07.2015 | Author(s): Maged F. Bekheet, Leonid Dubrovinsky, Aleksander Gurlo, Journal of Solid State Chemistry, 2015

Publication date: October 2015 Source:Journal of Solid State Chemistry, Volume 230 Author(s): Maged F. Bekheet, Leonid Dubrovinsky, Aleksander Gurlo Spinel-type MnIn2O4 materials are synthesized at 500°C from an In3+–Mn3+ co-precipitate; the synthesis is based on the in situ reduction ...

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Room‐Temperature Decarboxylative Alkynylation of Carboxylic Acids Using Photoredox Catalysis and EBX Reagents

24.07.2015 | Franck Le Vaillant, Thibaut Courant, Jerome Waser, Angewandte Chemie International Edition, 2015

Abstract Alkynes are used as building blocks in synthetic and medicinal chemistry, chemical biology, and materials science. Therefore, efficient methods for their synthesis are the subject of intensive research. Herein, we report the direct synthesis of alkynes from readily available ...

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Cyclometalation of Phenylpyridines by Rhodium(I) via Room‐temperature C–H Bond Activation

24.07.2015 | Hans‐Christian Böttcher, Marion Graf, Peter Mayer, Zeitschrift für anorganische und allgemeine Chemie, 2015

Abstract A convenient synthesis of cyclometalated complexes [{Rh(μ‐Cl)(C N)2}2] [C N = ppy, 2‐phenylpyridinato (2); C N = ptpy, 2‐(p‐tolyl)pyridinato (3); 4‐Clppy = 4‐chloro‐2‐phenylpyridinato (4)] at room temperature is described. The compounds were obtained by the oxidative addition ...

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ChemInform Abstract: Regioselective One‐Pot Synthesis of New Unsymmetric Spiro Dihydrofurans in the Reaction of Mixed Two Different Cyclic β‐Dicarbonyl Compounds with BrCN and Aldehydes in the Presence of Et3N.

24.07.2015 | Nader Noroozi Pesyan, Alireza Shokr, Ali Gharib, Tuncay Tunc, Ertan Sahin, ChemInform, 2015

Abstract One‐pot reaction of cyclic β‐dicarbonyl with various aldehydes in the presence of cyanogen bromide and triethylamine leads to the selective and efficient formation of crossed new unsymmetrical spiro dihydrofurans at room temperature (no yields given).

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ChemInform Abstract: Intermolecular Reductive Coupling of Esters with Benzophenones by Low‐Valent Titanium: Synthesis of Diarylmethyl Ketones Revisited.

24.07.2015 | Naoki Kise, Toshihiko Sakurai, ChemInform, 2015

Abstract Two‐ and four‐electron reduced products are obtained selectively by controlling the amounts of the reducing agents and the reaction temperature.

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ChemInform Abstract: Room Temperature C—P Bond Formation Enabled by Merging Nickel Catalysis and Visible‐Light‐Induced Photoredox Catalysis.

24.07.2015 | Jun Xuan, Ting‐Ting Zeng, Jia‐Rong Chen, Liang‐Qiu Lu, Wen‐Jing Xiao, ChemInform, 2015

Abstract The dual‐catalytic reaction between diarylphosphine oxides and aryl iodides shows good functional group tolerance and allows the synthesis of various triarylphosphine oxides.

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Synthesis of Nanocrystals and Particle Size Effects Studies on the Thermally Induced Spin Transition of the Model Spin Crossover Compound [Fe(phen)2(NCS)2]

24.07.2015 | Francisco Javier Valverde-Muñoz; Ana B. Gaspar; Sergii I. Shylin; Vadim Ksenofontov; José A. Real, Inorganic Chemistry, 2015

Surfactant-free nanocrystals of the model spin-crossover compound [Fe(phen)2(NCS)2] (phen: 1,10-phenanthroline) have been synthesized applying the reverse micelle technique. The morphology of the nanocrystals, characterized by scanning electronic microscopy, corresponds to rhombohedric platelets ...

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Water-Soluble Copolypeptides with Oligo-Ethylene-Glycol and Benzyl Pendants: Synthesis, Characterization, and Thermoresponsive Properties

24.07.2015 | Yu Yang, Yan Wu, Ruirui Li, Ying Ling, Haoyu Tang,, Australian Journal of Chemistry, 2015

Yu Yang, Yan Wu, Ruirui Li, Ying Ling, Haoyu Tang A series of random copolypeptides, i.e. poly(γ-propyl-l-glutamate)-graft-(oligo-ethylene-glycol)-random-poly(γ-benzyl-l-glutamate)s (PPLG-g- OEG3-ran-PBLG) with similar main chain lengths and various compositions of oligo-ethylene-glycol (OEG) ...

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Rattling in the Quadruple Perovskite CuCu3V4O12

23.07.2015 | Yasuhide Akizuki, Ikuya Yamada, Koji Fujita, Kazuya Taga, Takateru Kawakami, Masaichiro Mizumaki, Katsuhisa Tanaka, Angewandte Chemie International Edition, 2015

Abstract Of particular interest is a peculiar motion of guest atoms or ions confined to nanospace in cage compounds, called rattling. While rattling provides unexplored physical properties through the guest–host interactions, it has only been observed in a very limited class of materials. ...

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