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45.964 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 ...


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 ...


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 ...


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 ...


Gelation Behaviour of a Bent-core Dihydrazide Derivative : Effect of Incubation Temperature in Chloroform and Toluene

24.11.2015 | Chunxue Zhang; Tian ren Zhang; Nan Ji; Yan Zhang; Binlian Bai; Haitao Wang; Min Li, Soft Matter, 2015

In this work, a new kind of gelator, 1,3-bis[(3,4-dioctloxy phenyl) hydrazide] phenylene (BP8-C), containing two di-hydrazide units as the rigid bent-core, had been synthesized and investigated. It is demonstrated that BP8-C is an efficient gelator which can gel various organic solvents such as ...


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