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1.831 Aktuelle Fachpublikationen zum Thema temperature

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UV–visible spectra and gas-phase rate coefficients for the reaction of 2,3-pentanedione and 2,4-pentanedione with OH radicals

12.04.2015 | Author(s): L. Messaadia , G. El Dib , A. Ferhati , A. Chakir, Chemical Physics Letters, 2015

Publication date: 17 April 2015 Source:Chemical Physics Letters, Volume 626 Author(s): L. Messaadia , G. El Dib , A. Ferhati , A. Chakir The UV absorption cross-sections of 2,3-pentanedione and 2,4-pentanedione were measured and their reactions with OH were investigated in the gas-phase ...


Donor–Acceptor Type Thioxanthones: Synthesis, Optical Properties, and Two-Photon Induced Polymerization

08.04.2015 | Rashid Nazir; Evaldas Balčiu̅nas; Dorota Buczyńska; Florent Bourquard; Dorota Kowalska; David Gray; Sebastian Maćkow ..., Macromolecules, 2015

A set of thioxanthone derivatives bearing strongly electron-donating dialkylamino groups have been synthesized efficiently via the Buchwald–Hartwig, Sonogashira, and Heck reactions. Compounds possessing both one and two donors have been prepared. Their optical properties proved to be intriguing. ...


Solubility of CO2 in the Mixture of Methanol and ZIF-8 at Low Temperatures

08.04.2015 | Chengna Dai; Wenjuan Wei; Zhigang Lei, Journal of Chemical & Engineering Data, 2015

In this work, the mixture of methanol and zeolitic imidazolate framework (ZIF-8) was proposed for CO2 capture by adsorptive absorption at low temperatures. Methanol and ZIF-8 serve as absorption and adsorption functions, respectively. The solubility of CO2 in the different mixed absorbents (95 wt ...


Oxidation and Hydration of U3O8 Materials Following Controlled Exposure to Temperature and Humidity

02.04.2015 | Alison L. Tamasi; Kevin S. Boland; Kenneth Czerwinski; Jason K. Ellis; Stosh A. Kozimor; Richard L. Martin; Alison L ..., Analytical Chemistry, 2015

Chemical signatures correlated with uranium oxide processing are of interest to forensic science for inferring sample provenance. Identification of temporal changes in chemical structures of process uranium materials as a function of controlled temperatures and relative humidities may provide ...


Exciton Radiative Lifetimes in Two-Dimensional Transition Metal Dichalcogenides

31.03.2015 | Maurizia Palummo; Marco Bernardi; Jeffrey C. Grossman, Nano Letters, 2015

Light emission in two-dimensional (2D) transition metal dichalcogenides (TMDs) changes significantly with the number of layers and stacking sequence. While the electronic structure and optical absorption are well understood in 2D-TMDs, much less is known about exciton dynamics and radiative ...


Suzuki Coupling Reactions Catalyzed by PdO Dispersed on Dealuminated Y Zeolite in Air under Ambient Conditions

27.03.2015 | Kazu Okumura, Takumi Mushiake, Yu Matsui, Akira Ishii, ChemPhysChem, 2015

Abstract Suzuki coupling reactions are performed using PdO loaded on dealuminated Y (USY) zeolite. The reaction between bromobenzene and phenylboronic acid is complete in 15 min at room temperature in air, with a turnover number of 1300. The reaction can be repeated at least five times by ...


Nitrite Dismutase Reaction Mechanism: Kinetic and Spectroscopic Investigation of the Interaction between Nitrophorin and Nitrite

24.03.2015 | Chunmao He; Barry D. Howes; Giulietta Smulevich; Sigrun Rumpel; Edward J. Reijerse; Wolfgang Lubitz; Nicholas Cox; M ..., Journal of the American Chemical Society, 2015

Nitrite is an important metabolite in the physiological pathways of NO and other nitrogen oxides in both enzymatic and nonenzymatic reactions. The ferric heme b protein nitrophorin 4 (NP4) is capable of catalyzing nitrite disproportionation at neutral pH, producing NO. Here we attempt to resolve ...


A New Look at the Structural Properties of Trisodium Uranate Na3UO4

23.03.2015 | Anna L. Smith; Philippe E. Raison; Laura Martel; Damien Prieur; Thibault Charpentier; Gilles Wallez; Emmanuelle Suar ..., Inorganic Chemistry, 2015

The crystal structure of trisodium uranate, which forms following the interaction between sodium and hyperstoichiometric urania, has been solved for the first time using powder X-ray and neutron diffraction, X-ray absorption near-edge structure spectroscopy, and solid-state 23Na multiquantum ...


CBrF3 (Halon-1301): UV absorption spectrum between 210 and 320K, atmospheric lifetime, and ozone depletion potential

22.03.2015 | Author(s): François Bernard , Max R. McGillen , Eric L. Fleming , Charles H. Jackman , James B. Burkholder, Journal of Photochemistry and Photobiology A: Chemistry, 2015

Publication date: Available online 17 March 2015 Source:Journal of Photochemistry and Photobiology A: Chemistry Author(s): François Bernard , Max R. McGillen , Eric L. Fleming , Charles H. Jackman , James B. Burkholder CBrF3 (Halon-1301) is a man-made ozone depleting substance that is ...


Stabilization of a Bimolecular Triplex by 3′‐S‐Phosphorothiolate Modifications: An NMR and UV Thermal Melting Investigation

20.03.2015 | Kathryn Evans, Inder Bhamra, Richard T. Wheelhouse, John R. P. Arnold, Richard Cosstick, Julie Fisher, Chemistry - A European Journal, 2015

Abstract Triplexes formed from oligonucleic acids are key to a number of biological processes. They have attracted attention as molecular biology tools and as a result of their relevance in novel therapeutic strategies. The recognition properties of single‐stranded nucleic acids are also ...


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