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2.154 Aktuelle Fachpublikationen zum Thema temperature

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Thermal and photochemical reactions of methanol on nanocrystalline anatase TiO2 thin films

01.07.2015 | David A. Bennett; Matteo Cargnello; Thomas R. Gordon; Christopher B. Murray; John M. Vohs, Physical Chemistry Chemical Physics, 2015

The catalytic and photo-catalytic activity of well-defined anatase TiO2 nanocrystals for the partial oxidation of methanol was investigated using temperature-programmed desorption (TPD) in ultra-high vacuum in order to determine how crystallite size and shape affect reactivity. The TiO2 films ...

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Antagonistic Functionalized Nucleation and Oxidative Degradation in Combustive Formation of Pyrene‐Based Clusters Mediated by Triplet O and O2: Theoretical Study

26.06.2015 | Andrea Maranzana, Glauco Tonachini, ChemPhysChem, 2015

Abstract Polycyclic aromatic hydrocarbons (PAHs) and carbonaceous nanoparticles can be oxidized right from their inception and all through their growth. Oxidation can also promote their degradation. This modelistic density functional theory (DFT) study explores, in a descriptive manner, if ...

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Synthesis of Polysubstituted γ‐Butenolides via a Radical Pathway: Cyclization of α‐Bromo Aluminium Acetals and Comparison with the Cyclization of α‐Bromoesters at High Temperature

26.06.2015 | Romain Bénéteau, Carole F. Despiau, Jean‐Christophe Rouaud, Anne Boussonnière, Virginie Silvestre, Jacques Lebreton, ..., Chemistry - A European Journal, 2015

Abstract Polysubstituted butenolides were obtained in good to high yields from α‐bromoesters derived from propargyl alcohols by a one‐pot reaction involving the radical cyclization of α‐bromo aluminium acetals, followed by the oxidation of the resulting cyclic aluminium acetals in an ...

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Ab Initio Studies of Anatase TiO2 (101) Surface-supported Au8 Clusters

24.06.2015 | Mikolajczyk, A.; Pinto, H. P.; Gajewicz, A.; Puzyn, T.; Leszczynski, J., Current Topics in Medicinal Chemistry, 2015

Abstract: Supported transition metals on TiO2 surfaces have shown exceptional catalytic properties in many important process such as CO oxidation, selective propane oxidation, hydrogenation, water adsorption and other catalytic and photocatalytic oxidation reaction at low-temperature. Among ...

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Determining the Electronic Structure of a Series of [(phen)3M]0 (M = Ti, V, Mo) and [(pdi)2M]n+ (M = Cr, Mo) Complexes: Coordination of Neutral Ligands vs. π‐Radical Anions

22.06.2015 | Mei Wang, Thomas Weyhermüller, Karl Wieghardt, European Journal of Inorganic Chemistry, 2015

Abstract The molecular and electronic structures of newly synthesized complexes containing 2,6‐bis[1‐(4‐methoxyphenylimino)ethyl]pyridine (pdi) ligands have been determined by high‐resolution X‐ray crystallography, electronic and electron‐spin resonance spectroscopy, and temperature‐dependent ...

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Electrochemical method for wet removal of phosphine

22.06.2015 | Guangfei Qu, Jian Zhang, Yilu Lin, Junyan Li, Ping Ning, Yongtao Yu, Environmental Progress, 2015

The removal of phosphine (PH3) was studied with an electrochemical approach using a Ti/SnO2 anode. The effects of the current density, O2 content, gas flow rate, temperature, and type of electrolyte on the PH3 removal were investigated. The liquid phase reaction products were detected by ion ...

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Selective Photooxidation of a Mustard‐Gas Simulant Catalyzed by a Porphyrinic Metal–Organic Framework

17.06.2015 | Yangyang Liu, Ashlee J. Howarth, Joseph T. Hupp, Omar K. Farha, Angewandte Chemie International Edition, 2015

Abstract The photooxidation of a mustard‐gas simulant, 2‐chloroethyl ethyl sulfide (CEES), is studied using a porphyrin‐based metal–organic framework (MOF) catalyst. At room temperature and neutral pH value, singlet oxygen is generated by PCN‐222/MOF‐545 using an inexpensive and commercially ...

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Absolute Asymmetric Synthesis: Viedma Ripening of [Co(bpy)3]2+ and Solvent‐Free Oxidation to [Co(bpy)3]3+

17.06.2015 | Per Martin Björemark, Johan Jönsson, Mikael Håkansson, Chemistry - A European Journal, 2015

Abstract Syntheses of [Co(bpy)3]2+ yield racemic solutions because the Δ‐ and Λ‐enantiomers are stereochemically labile. However, crystallization and attrition‐enhanced deracemization can give homochiral crystal batches of either handedness in quantitative yield. Subsequently, solvent‐free ...

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Synthesis and Characterization of Ba[CoSO]: Magnetic Complexity in the Presence of Chalcogen Ordering

16.06.2015 | Martin Valldor, Ulrich K. Rößler, Yurii Prots, Chang‐Yang Kuo, Jen‐Che Chiang, Zhiwei Hu, Tun‐Wen Pi, Rüdiger Kniep, ..., Chemistry - A European Journal, 2015

Abstract Barium thio‐oxocobaltate(II), Ba[CoS2/2O2/2], was synthesized by the reaction of equimolar amounts of BaO, Co, and S in closed silica ampoules. The title compound (Cmcm, a=3.98808(3), b=12.75518(9), c=6.10697(4) Å) is isostructural to Ba[ZnSO]. The use of soft X‐ray absorption ...

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Characterization, Stability, and In Vitro Release Evaluation of Carboxymethyl Chitosan Coated Liposomes Containing Fish Oil

16.06.2015 | Qianqian Wang, Shun Lv, Jianfeng Lu, Shaotong Jiang, Lin Lin, Journal of Food Science, 2015

Abstract Fish oil was extracted and refined from Nile tilapia viscera. Uncoated liposomes (un‐L) and carboxymethylchitosan (CMCS)‐coated liposomes (CM‐L) containing fish oil were prepared, and their characteristics, stability, and release in vitro were studied. The CMCS coating increased the ...

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