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38.335 Aktuelle Fachpublikationen zum Thema temperature

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Investigation on the electronic structure of BN nanosheets synthesized via carbon-substitution reaction: the arrangement of B, N, C and O atoms

10.04.2013 | Lijia Liu; Tsun-Kong Sham; Weiqiang Han, Physical Chemistry Chemical Physics, 2013

Graphene-like BN nanosheets were synthesized via carbon-substitution reaction using graphene as a template in an attempt to produce C-doped BN. The carbon residue was removed by high-temperature oxidation in air. The role of the graphene template and oxygen with regard to the local structure ...

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Role of Argon in Graphene CVD Formation on SiC Surface. Title is changed now to: CVD Formation of Graphene on SiC Surface in Argon Atmosphere

10.04.2013 | Małgorzata Wierzbowska; Adam Dominiak; Kamil Tokar, Physical Chemistry Chemical Physics, 2013

We investigate the microscopic processes leading to graphene growth by the chemical vapor deposition of propane in the argon atmosphere at the SiC surface. Experimentally, it is known that the presence of argon fastens the dehydrogenation processes at the surface, in high temperature of about ...

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Anti-Bredt N-heterocyclic carbene: an efficient ligand for the gold(I)-catalyzed hydroamination of terminal alkynes with parent hydrazine

10.04.2013 | María J. López-Gómez; David Martin; Guy Bertrand, Chemical Communication, 2013

An anti-Bredt N-heterocyclic carbene gold(i) chloride complex was synthesized by taking advantage of the reversible insertion of the free carbene into the NH bond of hexamethyldisilazane. This precatalyst promotes the parent hydrazine hydroamination of terminal alkynes at room temperature.

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Thermochromic and Solvatochromic Nafion Films Incorporating Cationic Metal-Chelate Complexes

10.04.2013 | Yusuke Funasako; Tomoyuki Mochida, Chemical Communication, 2013

Nafion films incorporating cationic nickel complexes [NiII(acac)(R4en)]+ (acac = acetylacetonato, R4en = tetraalkylethylenediamine) have been prepared that exhibit chromic behaviors in response to temperature changes and solvent molecules in the vapor and liquid phases.

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Spatial heterogeneity in the sol–gel transition of a supramolecular system

10.04.2013 | David P. Penaloza; Atsuomi Shundo; Keigo Matsumoto; Masashi Ohno; Katsuaki Miyaji; Masahiro Goto; Keiji Tanaka, Soft Matter, 2013

Heating and then cooling down a dispersion of a peptide amphiphile in water forms hierarchical fibril structures leading to a supramolecular hydrogel. When the gel was physically broken apart by shaking, it transformed into a sol state. After aging it at room temperature for a given time, it ...

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Orbital-selective Single Molecule Reactions on a Metal Surface Studied by Low-temperature Scanning Tunneling Microscopy

10.04.2013 | Satoshi Katano; Yousoo Kim; Michael Trenary; Maki Kawai, Chemical Communication, 2013

The adsorption and reactions of acetonitrile on the Pt(111) surface have been investigated at the single-molecule level using scanning tunneling microscopy (STM) at 4.7 K. Atomically-resolved STM images revealed that the cyano (CN) group of acetonitrile is located almost at the bridge site of ...

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Hg2+-promoted photoactivation of triazolyl rhodamine

10.04.2013 | Yibin Yuan; Hua Yi; Juan Xie, Photochemical & Photobiological Sciences, 2013

Hg2+ was capable to induce the ring-opening of glycosyl triazolyl rhodamines after 26 h incubation at room temperature in MeCN/DMSO (99:1). This reaction can be dramatically accelerated by irradiation at 313 nm, by reducing the response time to 2 min. Selectivity towards Hg2+ has also been ...

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Chiral 2p-3d Heterometallic Azido Complex with 2,6-pyridinedicarboxylate as Co-ligand Showing Magnetic Order

10.04.2013 | Xian-He Bu, Dalton Transactions, 2013

A new chiral 3D heterometallic coordination polymer [NaCo2(L)2(N3) (MeOH)]∞ (1) (L = 2,6-pyridinedicarboxylate), was synthesized and characterized magnetically. Ferro- and antiferromagnetic interactions co-exist in 1, which resulted in a magnetic phase transition at a high temperature of 29 K.

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A comprehensive study on the cell chemistry of the sodium superoxide (NaO2) battery

10.04.2013 | Pascal Hartmann; Conrad L. Bender; Joachim Sann; Anna Katharina Dürr; Martin Jansen; Jürgen Janek; Philipp Adelhelm, Physical Chemistry Chemical Physics, 2013

This work reports on the cell chemistry of a room temperature sodium–oxygen battery using an electrolyte of diethylene glycol dimethyl ether (diglyme) and sodium trifluoromethanesulfonate (NaSO3CF3, sodium triflate). Different from lithium–oxygen cells, where lithium peroxide is found as the ...

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Photoelectrical properties and the electronic structure of Tl1−xIn1−xSnxSe2 (x = 0, 0.1, 0.2, 0.25) single crystalline alloys

10.04.2013 | G. E. Davydyuk; O. Y. Khyzhun; A. H. Reshak; H. Kamarudin; G. L. Myronchuk; S. P. Danylchuk; A. O. Fedorchuk; L. V. ..., Physical Chemistry Chemical Physics, 2013

Photoelectrical properties of Tl1−xIn1−xSnxSe2 single crystalline alloys (x = 0, 0.1, 0.2, 0.25) grown using the Bridgman–Stockbarger method were studied. The temperature dependence of electrical and photoconductivity for the Tl1−xIn1−xSnxSe2 single crystals was explored. It has been ...

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