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50.241 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 ...


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 ...


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) ...


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