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44.134 Aktuelle Fachpublikationen zum Thema temperature


Solid-State Transformation of Single Precursor Vanadium Complex Nanostructures to V2O5 and VO2: Catalytic Activity of V2O5 for Oxidative Coupling of 2-Naphthol

25.11.2014 | T Pal; Mukul Pradhan; Anindita Roy; Arun Kumar Sinha; Ramkrishna Sahoo; Dibakar Deb, Dalton Transactions, 2014

A vanadium complex, [(C5H5N)2V2O3.H2O] of different morphologies have been obtained via a modified hydrothermal procedure by using pyridine and VOSO4 salt as the starting material. The evolved [(C5H5N)2V2O3.H2O] nanobelts are of 50-200 nm in width and length up to several millimeters. At higher ...


The spontaneous room temperature reduction of HAuCl4 in ethylene glycol in the presence of ZnO: a simple strategy to obtain stable Au/ZnO nanostructures exhibiting strong surface plasmon resonance and efficient electron storage properties

25.11.2014 | Matías E. Aguirre; Gonzalo Perelstein; Armin Feldhoff; Adriana Condó; Alfredo J. Tolley; María A. Grela, New Journal of Chemistry, 2014

The room temperature spontaneous reduction of HAuCl4 in ethylene glycol in the presence of pre-formed ZnO nanoparticles is investigated by UV-vis spectroscopy. Analysis by HRTEM demonstrated that the synthesized nanostructures consist of small ZnO nanoparticles (5.0 nm) in contact with bigger (15 ...


Connecting short and long time dynamics in hard–sphere–like colloidal glasses

25.11.2014 | Raffaele Pastore; Massimo Pica Ciamarra; Giuseppe Pesce; Antonio Sasso, Soft Matter, 2014

Glass–forming materials are characterized by an intermittent motion at the microscopic scale. Particles spend most of their time rattling within the cages formed by their neighbors, and seldom jump to a different cage. In molecular glass formers the temperature dependence of jump features, such ...


The dynamic crossover in dielectric relaxation behavior of ice Ih.

25.11.2014 | I Popov; Alexander Puzenko; Airat Khamzin; Yuri Feldman, Physical Chemistry Chemical Physics, 2014

The main mechanism of the dielectric relaxation process of ordinary hexagonal ice (Ice Ih) and its temperature dependence remains unclear. The most interesting and as yet unexplained feature of ice is the presence of the dynamical crossover in relaxation time behavior around Tc=230±3K.Since there ...


The First Example of a Zirconium-Oxide Based Metal-Organic Framework Constructed from Monocarboxylate Ligands

25.11.2014 | weibin liang; Ravichandar Babarao; Michael J Murphy; Deanna Michelle D'Alessandro, Dalton Transactions, 2014

This work reports the first example of a Zr-based MOF which is exclusively constructed from the monocarboxylate ligand formate. Despite the low surface area, the new material exhibits an unexpectedly favourable affinity for carbon dioxide over nitrogen at room temperature.


Acridine based (S,N,S) pincer ligand: designing of silver(I) complexes for efficient activation of A3(aldehyde, alkyne and amine) coupling

25.11.2014 | Ajai kumar Singh; Om Prakash; Hemant Joshi; Umesh Kumar; Alpesh Kumar Sharma, Dalton Transactions, 2014

The complexes [AgL(NO3)CH3CN](1) and [AgLNO3] (2) are formed on reacting AgNO3 with L in acetonitrile for 12 (at room temperature) and 24 h (at 90 ºC) respectively, where L is a (S,N,S) pincer ligand, 4,5-bis(phenylthiomethyl)acridine, synthesized by the reaction of in situ generated PhS¯ with 4, ...


Fluorescence and room temperature activity of Y2O3:(Eu3+,Au3+)/palygorskite nanocomposite

25.11.2014 | Xi He; Huaming Yang, Dalton Transactions, 2014

The fluorescence and room temperature activity of palygorskite supported Y2O3:(Eu3+,Au3+) nanocomposite were investigated to design a fluorescence indicated catalyst. The effects of Au3+ doping on the structure and surface properties of host material were systematically characterized. The ...


Copper-nicotinamide complex: sustainable applications in coupling and cycloaddition reactions

25.11.2014 | Nasir Baig; Buchi Reddy Vaddula; Mallikarjuna N Nadagouda; Rajender S Varma, Green Chemistry, 2014

Crystalline copper (II)-nicotinamide complex, synthesized via simple mixing of copper chloride and nicotinamide solution at room temperature, catalyzes the C-S, C-N bond forming and cycloaddition reactions under a variety of sustainable reaction conditions.


Simultaneous three-dimensional temperature and velocity field measurements using astigmatic imaging of non-encapsulated thermo-liquid crystal (TLC) particles

25.11.2014 | Rodrigo Segura; Massimiliano Rossi; Christian Cierpka; Christian Kaehler, Lab on a Chip, 2014

A combination of cutting edge developments is presented to characterize three-dimensional (3D) temperature and velocity fields in microscopic flows. An emulsion of non-encapsulated thermo-liquid crystal (TLC) micro spheres, with a narrow size distribution is used to track the flow's motion and ...


Tuning the size and shape of nano-boehmites by a free-additive hydrothermal method

25.11.2014 | Pablo Pardo; Noemí Montoya; Javier Alarcón, CrystEngComm, 2014

A synthetic procedure allowing the control of boehmite micro and nanoparticles is presented. The proposed hydrothermal synthetic procedure is based on the control of three reaction parameters, the pH and temperature of precipitation of xerogels and the water/xerogel ratio for the hydrothermal ...


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