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37.754 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 ...


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 ...


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 ...


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 ...


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 ...


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 ...


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 ...


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 ...


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 ...


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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