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2.184 Aktuelle Fachpublikationen zum Thema temperature

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Ce4Ag3Ge4O0.5 – chains of oxygen-centered [OCe2Ce2/2] tetrahedra embedded in a [CeAg3Ge4] intermetallic matrix

18.09.2013 | Gunter Heymann; Jan F. Riecken; Dirk Johrendt; Sudhindra Rayaprol; Rainer Pöttgen; Hubert Huppertz, Dalton Transactions, 2013

The oxidation of an intermetallic phase under high-pressure/high-temperature conditions led to the synthesis of Ce4Ag3Ge4O0.5 exhibiting [OCe2Ce2/2] tetrahedral chains, in which the oxygen atoms statistically occupy the tetrahedral centres. Starting from a 1 [ ] : [ ] 1 [ ] : [ ] 1 CeAgGe ...

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One‐Step Synthesis of Biaryls under Mild Conditions

13.09.2013 | Aparna P. I. Bhat, Fawad Inam, Badekai Ramachandra Bhat, European Journal of Organic Chemistry, 2013

Abstract A one‐step synthesis of symmetrical biaryls was developed and uses a nickel(III) complex containing a Schiff base and dithiolate ligands as a catalyst for the homocoupling of in situ generated Grignard reagents. The coupling reaction was performed at room temperature with molecular ...

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Facile Rearrangement of 3-Oxoalkyl Radicals is Evident in Low-Temperature Gas-Phase Oxidation of Ketones

13.09.2013 | Adam M. Scheer; Oliver Welz; Darryl Y. Sasaki; David L. Osborn; Craig A. Taatjes, Journal of the American Chemical Society, 2013

The pulsed photolytic chlorine-initiated oxidation of methyl-tert-butyl ketone (MTbuK), di-tert-butyl ketone (DTbuK), and a series of partially deuterated diethyl ketones (DEK) is studied in the gas phase at 8 Torr and 550–650 K. Products are monitored as a function of reaction time, mass, and ...

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Crystal Structure, Phase Transitions, and Magnetic Properties of Iridium Perovskites Sr2MIrO6 (M = Ni, Zn)

12.09.2013 | P. Kayser; M. J. Martínez-Lope; J. A. Alonso; M. Retuerto; M. Croft; A. Ignatov; M. T. Fernández-Díaz, Inorganic Chemistry, 2013

Double perovskites containing Ir6+/Ir5+ with formula Sr2MIrO6 (M = Ni, Zn) have been synthesized under high oxygen pressure conditions. Their crystal structures have been studied by X-ray and neutron powder diffraction at room temperature (RT) and 2 K. At RT, these oxides crystallize in the ...

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Ferromagnetism of Nd-doped ZnO nanowires and the influence of oxygen vacancies: ab initio calculation

11.09.2013 | Qian Chen; Jinlan Wang, Physical Chemistry Chemical Physics, 2013

Room-temperature ferromagnetism (RTFM) has been achieved in rare earth (RE) element doped ZnO nanostructures while the mechanism of RTFM is still under debate. In this work, we investigated the electronic structure and magnetic properties of Nd-doped ZnO nanowires, and the influence of oxygen ...

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Temperature-dependent enhancement of oxygen reduction reaction activity for interconnected nitrogen-doped carbon shells

11.09.2013 | Na Li; Minhua Cao; Ling Ren; Changwen Hu, CrystEngComm, 2013

Interconnected carbon shells with a high nitrogen-doped level were successfully synthesized by a green self-assembly route. The synthesized carbon shells exhibited considerably enhanced oxygen reduction activities compared to those of the commercial Pt/C catalysts (20% Pt) and Pt-doped carbon ...

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On-surface coordination chemistry: direct imaging of the conformational freedom of an axial ligand at room temperature

11.09.2013 | Christian Wäckerlin; Dorota Siewert; Thomas A. Jung; Nirmalya Ballav, Physical Chemistry Chemical Physics, 2013

The on-surface ligation of nitric oxide (NO) with Co-tetraphenylporphyrin (CoTPP) sublimed onto oxygen-reconstructed Ni(001) is studied using room-temperature scanning tunneling microscopy (STM) and complementary photoemission spectroscopies. On the oxygen-reconstructed substrates, the porphyrins ...

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High‐Pressure Synthesis and Characterization of the Actinide Borate Phosphate U2[BO4][PO4]

10.09.2013 | Ernst Hinteregger, Klaus Wurst, Lukas Perfler, Florian Kraus, Hubert Huppertz, European Journal of Inorganic Chemistry, 2013

Abstract A new actinide borate phosphate, U2[BO4][PO4], was synthesized in a Walker‐type multianvil apparatus at 12.5 GPa and 1000 °C. The crystal structure was determined from single‐crystal X‐ray diffraction data collected at room temperature. U2[BO4][PO4] crystallizes in the monoclinic ...

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Four homochiral coordination polymers contain N-acetyl-L-tyrosine and different N-donor ligand: Influence of metal cations, ancillary ligands and coordination modes

09.09.2013 | Author(s): Meng-Li Li , Hui-Hua Song, Journal of Solid State Chemistry, 2013

Publication date: October 2013 Source:Journal of Solid State Chemistry, Volume 206 Author(s): Meng-Li Li , Hui-Hua Song Using the chiral ligand N-acetyl-L-tyrosine (Hacty) and maintaining identical reaction conditions, Zn(II), Co(II), and Cd(II) salts provided four novel homochiral ...

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Oxovanadium(IV) Schiff Base Complex Immobilized on CPS Microspheres as Heterogeneous Catalyst for Aerobic Selective Oxidation of Ethyl benzene to Acetophenone

09.09.2013 | Author(s): Baojiao Gao , Yanbin Li , Nan Shi, Reactive and Functional Polymers, 2013

Publication date: Available online 6 September 2013 Source:Reactive and Functional Polymers Author(s): Baojiao Gao , Yanbin Li , Nan Shi In this work, chloromethylated crosslinked polystyrene microspheres (CMCPS microspheres) were used as starting carrier, and a new immobilized bidentate ...

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