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45.254 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 ...


Design of dual stimuli responsive polymer modified magnetic nanoparticles for targeted anti-cancer drug delivery and enhanced MR imaging

25.11.2015 | Dipsikha Bhattacharya; Birendra Behera; Sumanta Kumar Sahu; Rajakumar Ananthakrishnan; Tapas Kumar Maiti; Panchanan ..., New Journal of Chemistry, 2015

Herein, we report a strategic design of dual temperature and pH responsive polymer integrated magnetic nanohybrids comprising of smart block copolymers and mixed ferrite nanoparticles (MFNPs) for efficient anti-cancer drug delivery and magnetic resonance imaging (MRI). Citrate stabilized mixed ...


Room temperature synthesis of organic surfactant free PbS and PbSe nanoparticles having NIR absorption

25.11.2015 | Sanyasinaidu Gottapu; Muralidharan Krishnamurthi, New Journal of Chemistry, 2015

The chemically synthesized nanoparticles have organic molecules surrounding the particles as capping, which create an inorganic-organic interface. These intimate interfaces influence the properties of the applied materials and subsequently the applications. Therefore, a method to produce ...


One pot synthesis of environmentally friendly lignin nanoparticles with compressed liquid carbon dioxide as an antisolvent

25.11.2015 | Aye Aye Myint; Hun Wook Lee; Bumjoon Seo; Won-Su Son; Junho Yoon; Tae Jun Yoon; Hee Jeong Park; Jihyun Yu; Jeyong Yo ..., Green Chemistry, 2015

Nanoparticles from the commercial kraft lignin were developed using a facile, one pot green technology of compressed CO2 antisolvent. N,N,-dimethylformamide (DMF) was employed as an organic solvent to prepare the lignin solution. The effects of various process parameters: temperature, pressure, ...


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 ...


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