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41.096 Aktuelle Fachpublikationen zum Thema temperature

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A high-temperature dielectric process as a probe of large-scale silica filler structure in simplified industrial nanocomposites

26.11.2014 | Guilhem Baeza; julian Oberdisse; Angel Alegria; Marc Couty; Anne-Caroline Genix, Physical Chemistry Chemical Physics, 2014

The existence of two independent filler-dependent high-temperature Maxwell-Wagner-Sillars dielectric processes (MWS) is demonstrated and characterized in detail in silica-filled styrene-butadiene (SB) industrial nanocomposites of simplified composition using Broadband Dielectric Spectroscopy ...

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Yolk-shell structured Gd2O3:Eu3+ phosphor prepared by spray pyrolysis: Effect of preparation conditions on microstructure and luminescence properties

26.11.2014 | Jung Sang Cho; Kyeong Youl Jung; Yun Chan Kang, Physical Chemistry Chemical Physics, 2014

Gd2O3:Eu3+ yolk–shell phosphor powders with high photoluminescence intensity were prepared by spray pyrolysis. Preparation temperature and spray solution concentration were varied to find the optimum process conditions for preparation of Gd2O3:Eu3+ with yolk-shell structure. The formation ...

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Molecular dynamics simulations of longer n-alkanes in silicalite: State-of-the-art models achieving close agreement with experiment

26.11.2014 | Alexander James O'Malley; C Richard A Catlow, Physical Chemistry Chemical Physics, 2014

The diffusion of longer n-alkanes (n-C8 - n-C16) in silicalite was studied using molecular dynamics (MD) simulations at a temperature range of 300 - 400 K, with loadings appropriate for direct comparison with previously carried out quasielastic neutron scattering (QENS) studies. The calculated ...

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A Comprehensive Review of Sodium Layered Oxide: Powerful Cathode for Na-ion Battery

26.11.2014 | Man Huon Han; Elena Gonzalo; Gurpreet Singh; Teofilo Rojo, Energy & Environmental Science, 2014

Room temperature Na-ion secondary battery has been under focus lately due to its feasibility to compete against already well-established Li-ion secondary battery. Although there are many obstacles to overcome before Na-ion battery becomes commercially available, recent research discoveries ...

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Self-organizing behaviour of glycosteroidal bolaphiles: insights into lipidic microsegregation

26.11.2014 | R. Xu; F. Ali-Rachedi; N. M. Xavier; S. Chambert; F. Ferkous; Y. Queneau; S. J. Cowling; E. J. Davis; J. W. Goodby, Organic & Biomolecular Chemistry, 2014

In this article we describe work on the synthesis of bolaphile biomimics composed of glucose head groups and steroidal units linked together by a methylene chain of varying length. The condensed phases formed by self-organization of the products as a function of temperature were characterized by ...

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Stepwise combination of NH3 with BH4- in metal borohydride ammoniate

26.11.2014 | Yuanzhou Song; Feilong Wu; Xiongfei Zheng; Xiaohua Ma; Fang Fang; Yanhui Guo, Chemical Communication, 2014

Step-wise combination of NH3 with BH4- was found proceeded on AlCl3•mNH3/nLiBH4 system. Firstly, only two N-H bonds of the NH3 groups combined with B-H bonds at low temperature. Secondly, the residual N-H bonds can further react with excessive B-H bonds at elevated temperature. The process is ...

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Tuning the singlet–triplet energy gap of AIE luminogens: crystallization-induced room temperature phosphorescence and delay fluorescence, tunable temperature response, highly efficient non-doped organic light-emitting diodes

26.11.2014 | Jie Li; Yibin Jiang; Juan Cheng; Yilin Zhang; Huimin Su; Jacky W. Y. Lam; Herman H. Y. Sung; Kam Sing Wong; Hoi Sing ..., Physical Chemistry Chemical Physics, 2014

In this contribution, we finely tuned the singlet–triplet energy gap (ΔEST) of AIE-active materials to modulate their fluorescence, phosphorescence and delay fluorescence via rational molecular design and investigated the possible ways to harvest their triplet energy in OLEDs. Noteworthily, two ...

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Unequal effect of ethanol/water on the stability of ct-DNA, poly [(dA-dT)] 2 and poly(rA)[round bullet, filled]poly(rU). Thermophysical properties

26.11.2014 | Rebeca Ruiz; Francisco J Hoyuelos; Ana M. Navarro; José Maria Leal; Begona Garcia, Physical Chemistry Chemical Physics, 2014

Ethanol affects unequally the thermal stability of DNA and RNA. The slopes of the melting temperature (Tm) versus ethanol/water content (v/v) was negative for [poly(dA-dT)]2 and positive for poly(rA)•poly(rU); for ct-DNA, the sign of the slope depends on the scan rate of heating and the ethanol ...

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A single-phased tunable emission phosphor MgY2Si3O10: Eu3+, Bi3+ with efficient energy transfer for white LEDs

26.11.2014 | Hongpeng Zhou; Ye Jin; Mingsong Jiang; Qingping Wang; Xingxing Jiang, Dalton Transactions, 2014

A novel single-phased tunable emitting phosphor MgY2Si3O10: Bi3+, Eu3+ has been synthesized by a conventional high temperature solid-state method. X-ray diffraction (XRD), photoluminescence emission and excitation spectra were utilized to characterize the as-synthesized samples. Under UV-light ...

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Enantioselective transformation of Na2SO3 into allylic sulfonic acids under Pd catalysis

26.11.2014 | Wei Liu; Xiao-ming Zhao; Hong-bo Zhang; Liang Zhang, Chemical Communication, 2014

Pd-catalyzed asymmetric allylic sulfonation of di-aryl-substituted allylic acetates with sodium sulfite (Na2SO3) in THF–H2O at room temperature was described. This method directly provided allylic sulfonic acids in up to excellent yield and enantioselectivity.

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