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16.089 Aktuelle Fachpublikationen zum Thema temperature

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Hydrogen bonded-extended lanthanide coordination polymers decorated with 2,3-thiophenedicarboxylate and oxalate: synthesis, structures, and properties

21.10.2014 | zhaohao li; Li-Ping Xue; Li-Li Shang; bangtun zhao; jian kan; Weiping Su, CrystEngComm, 2014

Five new lanthanide coordination polymers, {[Ln2(tdc)2(C2O4)(H2O)4]•(H2O)}n (Ln = Nd (1), Eu (2), Gd (3), Tb (4), Ho (5); H2tdc = 2,3-thiophenedicarboxylic acid), have been synthesized by hydrothermal reactions of H2tdc, sodium oxalate and corresponding lanthanide nitrate. Crystallographic data ...

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Platinum nanoparticles strongly associated with graphitic carbon nitride as efficient co-catalysts for photocatalytic hydrogen evolution under visible light

21.10.2014 | Yasuhiro Shiraishi; Yusuke Kofuji; Shunsuke Kanazawa; Hirokatsu Sakamoto; Satoshi Ichikawa; Shunsuke Tanaka; Takayuk ..., Chemical Communication, 2014

Platinum (Pt) nanoparticles with <4 nm diameter loaded on graphitic carbon nitride (g-C3N4) by reduction at 673 K behave as efficient co-catalysts for photocatalytic hydrogen evolution under visible light (λ

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Electrostatics Determine Vibrational Frequency Shifts in Hydrogen Bonded Complexes!

21.10.2014 | Arghya Dey; Sohidul Islam Mondal; Saumik Sen; Debashree Ghosh; G Naresh Patwari, Physical Chemistry Chemical Physics, 2014

The red-shifts in the acetylenic C–H stretching vibration of C–H∙∙∙X (X = O, N) hydrogen-bonded complexes increase with increase in the basicity of the Lewis base. Analysis of various components of stabilization energy suggests that the observed red-shifts are correlated with the electrostatic ...

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Neutral redox-active hydrogen- and halogen-bonding [2]rotaxanes for the electrochemical sensing of chloride

21.10.2014 | Jason Y. C. Lim; Matthew J. Cunningham; Jason J. Davis; Paul D. Beer, Dalton Transactions, 2014

The first examples of redox-active ferrocene-functionalised neutral [2]rotaxanes have been synthesised via chloride anion templation. 1H NMR spectroscopic titrations reveal that these [2]rotaxane host systems recognize chloride selectively over other halides and oxoanions in highly-competitive ...

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Conversion of chitin derived N-acetyl-D-glucosamine (NAG) into polyols over transition metal catalysts and hydrogen in water

21.10.2014 | Felix Daniel Bobbink; Jiaguang Zhang; Yann Pierson; Xi Chen; Ning Yan, Green Chemistry, 2014

N-Acetyl-D-glucosamine (NAG), the monomer of the world second most abundant biopolymer chitin, has been for the first time converted to its corresponding amide/amino substituted sugar alcohols, smaller C2~4 polyols and N-acetylmonoethanolamine (NMEA), over noble metal catalysts in the presence of ...

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Hydrogen generation by water splitting on hematite (0001) surfaces: first–principles calculations

21.10.2014 | haijun pan; Xiangying Meng; gaowu qin, Physical Chemistry Chemical Physics, 2014

The surface chemical activity is a critical factor affecting the photocatalytic efficiency of hematite. In this study, we symmetrically investigate the reaction kinetics of the heterolytic dissociation (H2O—OH-+H+) and hydrogen generation by water splitting on four kinds of hematite (0001) ...

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External electric field induced hydrogen storage/release on calcium-decorated single-layer and bilayer silicene

21.10.2014 | Er Hong Song; Sung Ho Yoo; Jae Joon Kim; Shiau Wu Lai; Qing Jiang; Sung Oh Cho, Physical Chemistry Chemical Physics, 2014

Hydrogen storage and release are two essential parameters that define the efficiency of a hydrogen storage medium. Herein, we investigate the effects of the external electric field F on the adsorption–desorption of H2 on a Ca-decorated silicene system (Ca–silicene) based on density functional ...

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Correction: A reduced radial potential energy function for the halogen bond and the hydrogen bond in complexes BXY and BHX, where X and Y are halogen atoms

21.10.2014 | Anthony C. Legon, Physical Chemistry Chemical Physics, 2014

Correction for ‘A reduced radial potential energy function for the halogen bond and the hydrogen bond in complexes B [] XY and B [] HX, where X and Y are halogen atoms’ by Anthony C. Legon, Phys. Chem. Chem. Phys., 2014, 16, 12415–12421.

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Si-mediated fabrication of reduced graphene oxide and its hybrids for electrode materials

21.10.2014 | Barun K Barman; Karuna Kar Nanda, Green Chemistry, 2014

Here, we demonstrate Si-mediated environment friendly reduction of graphene oxide (GO) and the fabrication of hybrids with the multiwall carbon nanotubes and nanofibers. The reduction of GO is facilitated by the nascent hydrogen generated by the reaction between Si and KOH at ~60 0C. The overall ...

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Catalytic methylation of aromatic amines with formic acid as the unique carbon and hydrogen source

21.10.2014 | Solène Savourey; Guillaume Lefèvre; Jean-Claude Berthet; Thibault Cantat, Chemical Communication, 2014

A novel methodology is presented for the direct methylation of amines, using formic acid as a unique source of carbon and hydrogen. Based on ruthenium(ii) catalysts, the formation of the N–CH3 group proceeds via an efficient formylation/transfer hydrogenation pathway.

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