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49.916 Aktuelle Fachpublikationen zum Thema temperature

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Temperature responsive behavior of polymer brush/polyelectrolyte multilayer composites

25.11.2015 | Samantha Micciulla; Olaf Soltwedel; Oliver Loehmann; Regine von Klitzing, Soft Matter, 2015

The complex interaction of polyelectrolyte multilayers (PEMs) physisorbed onto end-grafted polymer brushes with focus on the temperature-responsive behavior of the system is addressed in this work. The investigated brush/multilayer composite consists of a poly(styrene sulfonate)/poly(diallyl ...


A Mild Hydration of Nitriles Catalysed by Copper(II) Acetate

25.11.2015 | Patricia Marce; James Lynch; John Blacker; J M J Williams, Chemical Communication, 2015

A simple, mild and general procedure for the hydration of nitriles to amides using copper as catalyst and promoted by N,N-diethylhydroxylamine is described. The reaction can be conducted in water at low temperature in short reaction times. This new procedure allows amides to be obtained from a ...


V2O5/SBA-15 nanocatalysts for the selective synthesis of 2,3,5-trimethyl-1,4-benzoquinone at room temperature

25.11.2015 | David Raju Burri; C. K. Prasad Neeli; Venkata Siva Prasad Ganjala; Venkateswarlu Vakati; Rama Rao Seetha Kamaraju, New Journal of Chemistry, 2015

A series of four V2O5/SBA-15 catalysts with the loadings of 5, 7.5, 10 and 12.5% (by weight) V2O5 have been prepared by molecular designed dispersion (MDD) method and are characterized by N2-physisorption, low-angle and wide-angle XRD, transmission electron microscope (TEM), Fourier ...


Room temperature synthesis of flower-like CaCO3 architectures

25.11.2015 | Lu-feng Yang; De-qing Chu; Hui-lou Sun; Ge Ge, New Journal of Chemistry, 2015

The shape-controlled crystallization of highly ordered three-dimensional (3D) hierarchical flower-like vaterite calcium carbonate (CaCO3) architecture was successfully prepared from a mild water–urea mixed system by a simple precipitation method. The mechanism of the crystal growth of CaCO3 was ...


A strategy for enhanced antibacterial activity against Staphylococcus aureus by the assembly of alamethicin with a thermo-sensitive polymeric carrier

25.11.2015 | Ping Dong; Yuan Zhou; Weiwei He; Daoben Hua, Chemical Communication, 2015

We demonstrate here a strategy for enhanced antibacterial activity against microbial strains by the assembly of antimicrobial peptides with a temperature-responsive polymeric carrier. The assembly complex was less toxic to human cells and more stable to enzymatic cleavage. This work may provide a ...


A protocol for amide bond formation with electron deficient amines and sterically hindered substrates

25.11.2015 | Maria E. Due-Hansen; Sunil K. Pandey; Elisabeth Christiansen; Rikke Andersen; Steffen V. F. Hansen; Trond Ulven, Organic & Biomolecular Chemistry, 2015

A protocol for amide coupling by in situ formation of acyl fluorides and reaction with amines at elevated temperature has been developed and found to be efficient for coupling of sterically hindered substrates and electron deficient amines where standard methods failed. 2015 Hot Articles in ...


Mesoporous In2O3 nanocrystals: synthesis, characterization and NOx gas sensor at room temperature

25.11.2015 | Jun Gao; Hongyuan Wu; Jiao Zhou; Liyuan Yao; Guo Zhang; Shuang Xu; Yu Xie; Li Li; Keying Shi, New Journal of Chemistry, 2015

Mesoporous In2O3 nanocrystals (INS) were successfully prepared using SBA-16 as the template. The INS-3 synthesized by the 0.3 M In(NO3)3 solution had 7.27 nm mean pore size and 82.32 m2•g-1 specific surface area, the mesoporous In2O3 nanocrystals were interconnected In2O3 small-grain (~ 5 nm) ...


Size-dependent Strain and Surface Energies of Gold Nanoclusters

25.11.2015 | Shahid Ali; Vladimir S. Myasnichenko; Erik C. Neyts, Physical Chemistry Chemical Physics, 2015

Gold nanocluster properties exhibit a unique size-dependence. In this contribution, we employ reactive molecular dynamics simulations to calculate size- and temperature-dependent surface energies, strain energies and atomic displacements for icosahedral, cuboctahedral, truncated octahedral and ...


Flexible MOFs under stress: pressure and temperature

25.11.2015 | Abraham Clearfield, Dalton Transactions, 2015

In the recent past an enormous number of Metal–Organic Framework type compounds (MOFs) have been synthesized. The novelty resides in their extremely high surface area and the ability to include additional features to their structure either during synthesis or as additives to the MOF. This ...


Construction of Smart Temperature-Responsive GPx Mimic Based on the Self-Assembly of Supra-Amphiphiles

24.11.2015 | Huixin Zou; Hongcheng Sun; Liang Wang; Liulu Zhao; Jiaxi Li; Zeyuan Dong; Quan Luo; Jiayun Xu; Junqiu Liu, Soft Matter, 2015

Glutathione peroxidase (GPx) is a major defense against hydroperoxides as a kind of seleno-enzyme that protects cells from oxidative damage. A supramolecular vesicle with controllable GPx activity and morphology has been successfully constructed by the self-assembly of supra-amphiphiles formed by ...


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