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50.111 Aktuelle Fachpublikationen zum Thema temperature

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Sequential aza-Piancatelli rearrangement/Friedel-Crafts alkylation for the synthesis of benzo[b]cyclopenta[f]pyrrolo[1,2-d][1,4]diazepin-11(9H)-one derivatives

01.12.2015 | Venkata Subba Reddy Basireddy; Yeturi Vikram Reddy; Kiran Kumar Singarapu, Organic & Biomolecular Chemistry, 2015

2-Furylcarbinols undergo a smooth aza-Piancatelli rearrangement followed by Friedel-Crafts alkylation with a bifunctional substrate, (1H-pyrrol-1-yl)aniline in the presence of 10 mol% In(OTf)3 in acetonitrile at room temperature to afford the corresponding ...


Thermodynamics of Solvent Interaction with the Metal – Organic Framework MOF-5

01.12.2015 | Zamirbek Akimbekov; Di Wu; Carl K. Brozek; Mircea Dinca; Alexandra Navrotsky, Physical Chemistry Chemical Physics, 2015

The inclusion of solvent in metal organic framework (MOF) materials is a highly specific form of guest – host interaction. In this work, the energetics of solvent – MOF-5 interactions has been investigated by solution calorimetry in 5 M sodium hydroxide (NaOH) at room temperature. Solution ...


La-doped Mg-Al mixed metal oxide supported copper catalyst with enhanced catalytic performance in transfer dehydrogenation of 1-decanol

01.12.2015 | Ming Zhang; Yajie Zhao; Qian Liu; Lan Yang; Guoli Fan; Feng Li, Dalton Transactions, 2015

In the present work, a La-doped Mg-Al mixed metal oxide supported copper catalyst (Cu/La-MgAlO) was synthesized through a layered double hydroxide precursor route. The materials were characterized by powder X-ray diffraction, transmission electron microscopy, CO2-temperature programmed ...


From insertion to multicomponent coupling: temperature dependent reactions of arynes with aliphatic alcohols

01.12.2015 | Manikandan Thangaraj; Sachin Suresh Bhojgude; Manoj Mane; Akkattu Biju, Chemical Communication, 2015

The temperature dependent selectivity switch in the reaction of arynes with aliphatic alcohols in THF has been reported. At -20 °C, arynes smoothly insert into the O-H bond of alcohols to form alkyl aryl ethers. Interestingly, at 60 °C, highly selective multicomponent coupling occurs with solvent ...


The effect of guanidinium functionalization on the structural properties and anion affinity of polyelectrolyte multilayers

01.12.2015 | Zheng Cao; Pavlo Gordiichuk; Katja Loos; Ernst JR Sudhölter; Louis de Smet, Soft Matter, 2015

Poly(allylamine hydrochloride) (PAH) is chemically functionalized with guanidinium (Gu) moieties in water at room temperature. The resulting PAH-Gu is used to prepare polyelectrolyte multilayers (PEMs) with poly(sodium 4-styrene sulfonate) (PSS) via layer-by-layer deposition. The polyelectrolyte ...


Geometric order parameters derived from the Voronoi tessellation show signatures of the jamming transition

01.12.2015 | Peter K. Morse; Eric I. Corwin, Soft Matter, 2015

A jammed packing of frictionless spheres at zero temperature is perfectly specified by the network of contact forces from which mechanical properties can be derived. However, we can alternatively consider a packing as a geometric structure, characterized by a Voronoi tessellation which encodes ...


Facile preparation of supramolecular ionogels exhibiting high temperature durability as solid electrolytes

01.12.2015 | Tao Zhou; Xinpei Gao; Fei Lu; Na Sun; Liqiang Zheng, New Journal of Chemistry, 2015

Ionogels, solid-like materials maintaining many of the physicochemical properties of ionic liquids, have aroused much interest as excellent functional materials. Here, a facile strategy of the preparation of supramolecular ionogels is reported. Benzenetricarboxylic acid (H3BTC) and Fe(NO3)3·9H2O ...


A Study of Interfacial Resistive Switching Mechanism by Proton Exchange Reactions on SiOx layer

01.12.2015 | Fei Zhou; Yao-Feng Chang; Ying-Chen Chen; Xiaohan Wu; Ye Zhang; Burt W Fowler; Jack C. Lee, Physical Chemistry Chemical Physics, 2015

In this work, we investigated SiOx–based interfacial resistive switching in planar metal-insulator-metal structuresusing physical/chemical/electrical analyses. This work helps clarify the interfacial reaction process and mechanism in SiOx, andalso shows thepotential for high temperature ...


Investigation of luminescence properties and the energy transfer mechanism of tunable emitting Sr3Y2(Si3O9)2:Eu2+,Tb3+ phosphors

01.12.2015 | Mengfei Zhang; Yujun Liang; Shuangyu Xu; Yingli Zhu; Xingya Wu; Shiqi Liu, CrystEngComm, 2015

A series of Eu2+ and Tb3+ singly-doped and co-doped Sr3Y2(Si3O9)2 (SYSO) phosphors have been synthesized via a conventional high-temperature solid-state reaction. The crystal structures, photoluminescence properties, fluorescence lifetimes, thermal properties and energy transfer of SYSO:Eu2+,Tb3+ ...


Total chemical synthesis of a polymer/graphene nanocomposite

01.12.2015 | Rodrigo Villegas Salvatierra; Carlos Cava; Luciamara Roman; Marcela M. Oliveira; Aldo J.G. Zarbin, Chemical Communication, 2015

A versatile and room temperature synthesis of thin films of polymer/graphene is reported. Drastically differing from other methods, not only the polymer but also the graphene are completely build from their simplest monomers (thiophene and benzene) in a one-pot polymerization reaction at a ...


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