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2.121 Aktuelle Fachpublikationen zum Thema temperature

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Living Supramolecular Compounds: Influence of Multiple Hydrogen Bond Connection on Molecular Configuration of Monophosphate or Pyrophosphate Thiamine with Anions or Coordination Anions

20.10.2014 | Xiao Xi Zhang, Rui Zhang, Qiao Sun, Si Yue Wei, Xue Ting Xu, Ji Xiao Wang, Feng Ying Bai, Yong Heng Xing, Zeitschrift für anorganische und allgemeine Chemie, 2014

Abstract Three supramolecular compounds with monophosphate or pyrophosphate esters of thiamine, namely, [TPPH+·CF3SO3·H2O] (1), [TMPH+·(CdCl4)0.5·2H2O] (2), and [TMPH+·NO3·2.5H2O] (3) (TPP = thiamine pyrophosphate, TMP = thiamine monophosphate) were synthesized in methanol or water systems at ...

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From orientation disordered to ordered—An ab initio simulation on ammonia borane phase transition within Van Der Waals corrections

18.10.2014 | Qi Song, Zhenyi Jiang, Zhiyong Zhang, Yuqing Hou, Xiaodong Zhang, Journal of Computational Chemistry, 2014

In this work, we report a detailed theoretical investigation of the phase transition of ammonia borane (NH3BH3; AB), from a tetragonal I4mm ( ) phase with disordered orientation of hydrogen to an orthorhombic phase with Pmn21 ( ) symmetry, as a function of temperature based on Density Functional ...

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Rhodium(III) cationic methyl complexes containing dimethylformamide ligand, cis-[Rh(β-diket)(PPh3)2(CH3)(DMF)][BPh4] (β-diket = acetylacetonate or benzoylacetonate), in comparison with their acetonitrile analogs

17.10.2014 | Author(s): Elizaveta P. Shestakova , Yuri S. Varshavsky , Victor N. Khrustalev , Galina L. Starova , Sergei N. ..., Journal of Organometallic Chemistry, 2014

Publication date: 15 December 2014 Source:Journal of Organometallic Chemistry, Volume 774 Author(s): Elizaveta P. Shestakova , Yuri S. Varshavsky , Victor N. Khrustalev , Galina L. Starova , Sergei N. Smirnov The rhodium(III) cationic methyl complexes, ...

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Ceria–Zirconia Solid Solutions (Ce1–xZrxO2−δ, x ≤ 0.2) for Solar Thermochemical Water Splitting: A Thermodynamic Study

17.10.2014 | Yong Hao; Chih-Kai Yang; Sossina M. Haile, Chemistry of Materials, 2014

The redox behavior of ceria–zirconia solid solutions (or Zr-substituted ceria, ZSC) with a Zr content of up to 20 mol % is studied by thermogravimetry (TG) between 600 °C and 1490 °C under controlled atmospheres. Thermodynamic properties, specifically standard oxidation enthalpy, ΔHoxd⊖, and ...

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Cooperative Interplay of van der Waals Forces and Quantum Nuclear Effects on Adsorption: H at Graphene and at Coronene

17.10.2014 | Erlend R. M. Davidson; Jiří Klimeš; Dario Alfè; Angelos Michaelides, ACS Nano, 2014

The energetic barriers that atoms and molecules often experience when binding to surfaces are incredibly important to a myriad of chemical and physical processes. However, these barriers are difficult to describe accurately with current computer simulation approaches. Two prominent contemporary ...

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Hydrocarbon Addition Reactions during Low-Temperature Autoxidation of Oilsands Bitumen

16.10.2014 | Muhammad N. Siddiquee; Arno de Klerk, Energy & Fuels, 2014

Low-temperature oxidation of bitumen with air in the temperature range of 130–160 °C was investigated. Of particular interest were the addition reactions taking place during oxidation, which contributed to the observed increase in viscosity of oxidized bitumen. During the autoxidation of bitumen, ...

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Enhancing Sulfur Tolerance of Pd Catalysts by Hydrogen Spillover with Two Different Zeolite Supports for Low-Temperature Hydrogenation of Aromatics

16.10.2014 | Hyun Jae Kim; Chunshan Song, Energy & Fuels, 2014

Pd catalysts supported on zeolite Y and zeolite A (Pd/Y and Pd/A) were prepared separately and combined for improving sulfur tolerance based on our proposed catalyst design concept for low-temperature hydrogenation of aromatics in distillate fuels. After the external surface of Pd/A was ...

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Photodriven Transfer Hydrogenation of Olefins

15.10.2014 | Dasheng Leow, Ying‐Ho Chen, Tzu‐Hang Hung, Ying Su, Yi‐Zhen Lin, European Journal of Organic Chemistry, 2014

Abstract An improved practical method for the photodriven diimide reduction of olefins was investigated. This catalyst‐free procedure proceeds at ambient temperature, utilizes air as oxidant and a lower hydrazine loading, and produces inert nitrogen gas as the sole byproduct. Several ...

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Conformational Flexibility of Dibenzobarrelene-Based PC(sp3)P Pincer Iridium Hydride Complexes: The Role of Hemilabile Functional Groups and External Coordinating Solvents

15.10.2014 | Gleb A. Silantyev; Oleg A. Filippov; Sanaa Musa; Dmitri Gelman; Natalia V. Belkova; Klaus Weisz; Lina M. Epstein; El ..., Organometallics, 2014

Bifunctional dibenzobarrelene-based PC(sp3)P pincer iridium complex 1 is known as an efficient catalyst in acceptorless dehydrogenation of alcohols and hydrogenation/hydroformylation of alkenes. In order to shed light on the mechanism of the hydrogen formation/activation, we performed ...

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Enhancing Antioxidant Activity of Sesamol at Frying Temperature by Addition of Additives through Reducing Volatility*

14.10.2014 | Hong‐Sik Hwang, Jill K. Winkler‐Moser, Karl Vermillion, Sean X. Liu, Journal of Food Science, 2014

Abstract Additives were evaluated to investigate their effects on volatility of sesamol at frying temperature with the hypothesis that the interaction between an additive and sesamol would reduce sesamol volatility. Twenty‐two additive : sesamol combinations were examined by thermogravimetric ...

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