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1.763 Aktuelle Fachpublikationen zum Thema temperature

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Novel heterocyclic poly(pyridine‐imide)s with unsymmetric carbazole substituent and noncoplanar structure: High thermal, mechanical and optical transparency, electrochemical, and electrochromic properties

21.11.2014 | Ying‐Chi Huang, Kun‐Li Wang, Wei‐Yi Lee, Yi‐An Liao, Der‐Jang Liaw, Kueir‐Rarn Lee, Juin‐Yih Lai, Journal of Polymer Science Part A: Polymer Chemistry, 2014

ABSTRACT A diamine containing heterocyclic pyridine and unsymmetrical carbazole substituents, 4‐(9‐ethyl‐3‐carbazole)‐2,6‐bis(4‐aminophenyl)pyridine (CBAPP), was prepared for use in the synthesis of poly(pyridine‐imide)s PI‐1–8 by direct polycondensation with dianhydrides in ...

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Fluorescence Enhancement of Covalently Linked 1‐Cyano‐1,2‐Diphenylethene Chromophores with Naphthalene‐1,8‐diyl Linker Units: Analysis Based on Kinetic Constants

20.11.2014 | Takashi Hirose, Yohei Tsunoi, Yuya Fujimori, Kenji Matsuda, Chemistry - A European Journal, 2014

Abstract The fluorescence enhancement effect of covalently fixed fluorescent chromophores has been investigated by means of kinetic analysis of decay rate constants and theoretical calculations. Derivatives of 1‐cyano‐1,2‐diphenylethene dimer have a distorted cyclic structure when both ends ...

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Physicochemical and textural properties of tartary buckwheat starch after heat‐moisture treatment at different moisture levels

20.11.2014 | Hang Liu, Manman Lv, Qiang Peng, Fang Shan, Min Wang, Starch - Stärke, 2014

Tartary buckwheat, which has nutritional and health benefits, has been consumed in China for so many years. However, its predominant component, starch, limits the application range of tartary buckwheat in the food industry. In this study, tartary buckwheat starch (TBS) was extracted and ...

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Dual Emission and Excited-State Mixed-Valence in a Quasi-Symmetric Dinuclear Ru–Ru Complex

20.11.2014 | Christoph Kreitner; Markus Grabolle; Ute Resch-Genger; Katja Heinze, Inorganic Chemistry, 2014

The synthesis and characterization of the new dinuclear dipeptide [(EtOOC-tpy)Ru(tpy-NHCO-tpy)Ru(tpy-NHCOCH3)]4+ 34+ of the bis(terpyridine)ruthenium amino acid [(HOOC-tpy)Ru(tpy-NH2)]2+ 12+ are described, and the properties of the dipeptide are compared to those of the mononuclear complex ...

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A New Class of Single‐Component Absorbents for Reversible Carbon Dioxide Capture under Mild Conditions

19.11.2014 | Francesco Barzagli, Sarah Lai, Fabrizio Mani, ChemSusChem, 2014

Abstract Some inexpensive and commercially available secondary amines reversibly react with CO2 at room temperature and ambient pressure to yield carbonated species in the liquid phase in the absence of any additional solvent. These solvent‐free absorbents have a high CO2 capture capacity ...

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Alginate/PVA Beads for Levan Production by Zymomonas mobilis

18.11.2014 | Marina F. S. Lorenzetti, Marina R. Moro, Crispin H. García‐Cruz, Journal of Food Process Engineering, 2014

Abstract The levan is a biopolymer of great importance to the food industry since it is capable of defining and modifying the structure of one food, acting as stabilizer, thickener, gelling agent and being largely responsible for the texture of processed foods. The levan production by ...

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TiO2–SiO2-Composite-Supported Catalysts for Residue Fluid Catalytic Cracking Diesel Hydrotreating

17.11.2014 | Qiang Wei; Ying Li; Tao Zhang; Xiujuan Tao; Yasong Zhou; Keng Chung; Chunming Xu, Energy & Fuels, 2014

Composites of TiO2–SiO2 oxides (CTS) with various Ti/Si atomic ratios were prepared by the sol–gel method, and the CO2 supercritical fluid extraction method was used to remove solvent in the gel. The effects of the Ti/Si atomic ratio and calcination temperature on the specific surface area, pore ...

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Local measurement of mass transfer in a reactive spray for CO2 capture

13.11.2014 | Maria Ouboukhlik, Sawitree Saengkaew, Marie‐Christine Fournier‐Salaün, Lionel Estel, Gérard Grehan, The Canadian Journal of Chemical Engineering, 2014

Abstract CO2 capture is still a major challenge for the environment and decarbonisation of gas streams. It has been industrially feasible for several decades using chemical absorption by alkanolamine solvents. The purpose of this work is to characterize the mass transfer in a spray contactor ...

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Shock Tube Study of Dimethylamine Oxidation

12.11.2014 | Sijie Li, David F. Davidson, Ronald K. Hanson, International Journal of Chemical Kinetics, 2014

ABSTRACT Dimethylamine (DMA) ignition delay times and OH time histories during the oxidation process were investigated behind reflected shock waves. The ignition delay time measurements cover the temperature range of 1181–1498 K, with pressures near 0.9, 1.5, and 2.8 atm, and equivalence ...

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A new approach to determination of hydration equilibria constants for the case of [Er(EDTA)(H2O)n]− complexes

12.11.2014 | Rafał Janicki; Anna Mondry, Physical Chemistry Chemical Physics, 2014

Two anionic complexes [Er(EDTA)(H2O)2]− and [Er(EDTA)(H2O)3]− were obtained in the form of the following compounds: [C(NH2)3]2[Er(EDTA)(H2O)2]ClO4·6H2O (I) and Na[Er(EDTA)(H2O)3]·5H2O (II), respectively. The UV-vis-NIR absorption spectra of both monocrystals were measured at room temperature and ...

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