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44.134 Aktuelle Fachpublikationen zum Thema temperature

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The direct electrophilic cyanation of [small beta]-keto esters and amides with cyano benziodoxole

25.11.2014 | Yao-Feng Wang; Jiashen Qiu; Dejie Kong; Yongtao Gao; Feipeng Lu; Pran Gopal Karmaker; Fu-Xue Chen, Organic & Biomolecular Chemistry, 2014

The direct electrophilic α-cyanation of β-keto esters and amides has been developed using a hypervalent iodine benziodoxole-derived cyano reagent. The procedure is accomplished within 10 min and without the use of any catalyst in DMF, at room temperature. Thus, the highly functionalized ...

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The Stabilisation of Gallane and Indane by a Ring Expanded Carbene

25.11.2014 | Anthony R Leverett; Alasdair Iain McKay; Marcus Lawford Cole, Dalton Transactions, 2014

7Dipp Complexes of the group 13 binary hydrides GaH3 and InH3 have been prepared. Both adducts possess excellent thermal stability in the solid state but decompose readily in solution at ambient temperature. The presence of short M-H….H-CAlkyl distances in the structures of both [MH3(7Dipp)] ...

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Heat-induced transformation of CdSe/CdS/ZnS core/multishell quantum dots by Zn diffusion into inner layers

25.11.2014 | Anil Ozan Yalcin; Bart Goris; Relinde J. A. van Dijk - Moes; Zhaochuan Fan; Ahmet K. Erdamar; Frans D. Tichelaar; Th ..., Chemical Communication, 2014

In this work, we investigate the thermal evolution of CdSe/CdS/ZnS core/multishell quantum dots (QDs) in-situ in the transmission electron microscope (TEM). Starting at a temperature of approximately 250 ⁰C, Zn diffusion into inner layers takes place together with simultaneous evaporation of ...

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Saccharides and temperature dual-responsive hydrogel layers for harvesting cell sheets

25.11.2014 | Bingbing Guo; Guoqing Pan; Qianping Guo; Caihong Zhu; Wenguo Cui; Bin Li; Huilin Yang, Chemical Communication, 2014

Saccharides and temperature dual-responsive hydrogels have been prepared based on PNIPAAm copolymers containing phenylboronic acid (PBA) groups and used for harvesting cell sheets. The cell sheet could be released from the hydrogel layer at 37 °C simply by increasing sugar concentration, and ...

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Large [gamma]-CuI semiconductor single crystal growth by temperature reduction method from NH4I aqueous solution

25.11.2014 | Yangyang Lv; Zhihuang Xu; Liwang Ye; Zhaojun Zhang; Genbo Su; Xinxin Zhuang, CrystEngComm, 2014

NH4I has been proved to be a promising cosolvent for cuprous iodide (CuI) single crystal growth from aqueous solutions by the temperature reduction method. In our work, as compared with NH4Cl and NH4Br, NH4I offers more advantages for the single crystal growth, such as remarkably increasing the ...

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Tuning the radial structure of core-shell silicon carbide nanowires

25.11.2014 | Marco Negri; Sathish Chander Dhanabalan; Giovanni Attolini; Paola Lagonegro; Marco Campanini; Matteo Bosi; Filippo F ..., CrystEngComm, 2014

The influence of growth condition over structural properties is reported for core-shell SiC/SiO2 nanowires grown on silicon substrates by CVD technique. SEM and TEM studies show a correlation between the growth temperature and nanowires structure and highlight the possibility to control the inner ...

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Ferromagnetic Ordering in the Radical Cation Salt BBDTA[round bullet, filled]Au(CN)2 at 8.2 K

25.11.2014 | Wataru Fujita, Dalton Transactions, 2014

An organic radical cation salt, BBDTA•Au(CN)2, with a slipped π-stacking columnar structure and intercolumnar short contacts, shows ferromagnetic ordering at 8.2 K, the highest reported temperature among the BBDTA+ cation salts.

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The role of Cu species in electrospun CuO–CeO2 nanofibers for total benzene oxidation

25.11.2014 | Yongjin Luo; Kuncan Wang; Yuxian Xu; Xiuyun Wang; Qingrong Qian; Qinghua Chen, New Journal of Chemistry, 2014

CuO–CeO2 nanofibers with relatively high surface area (EL-CuCe) have been successfully prepared by the electrospinning method and investigated for total benzene oxidation. The improved low-temperature performance of EL-CuCe compared to ST-CuCe (prepared by the surfactant-templated method) is ...

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The role of the glassy dynamics and thermal mixing in the dynamic nuclear polarization and relaxation mechanisms of pyruvic acid

25.11.2014 | M. Filibian; S. Colombo Serra; M. Moscardini; A. Rosso; F. Tedoldi; P. Carretta, Physical Chemistry Chemical Physics, 2014

The temperature dependence of 1H and 13C nuclear spin–lattice relaxation rate 1/T1 has been studied in the 1.6–4.2 K temperature range in pure pyruvic acid and in pyruvic acid containing trityl radicals at a concentration of 15 mM. The temperature dependence of 1/T1 is found to follow a quadratic ...

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Facile immobilization of enzyme on three dimensionally ordered macroporous silica via a biomimetic coating

25.11.2014 | Yanjun Jiang; Yaping Wang; Hua Wang; Liya Zhou; Jing Gao; Yufei Zhang; Xu Zhang; Xiaomei Wang; Jian Li, New Journal of Chemistry, 2014

This study describes a general strategy using norepinephrine (NE) as a stable anchor for the immobilization of enzyme onto three-dimensionally ordered macroporous (3DOM) silica. Penicillin G acylase (PGA) was chosen as a model enzyme. The effect of pH and temperature on the activity of ...

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