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2.307 Aktuelle Fachpublikationen zum Thema temperature

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Crystal structure, thermal expansion and high-temperature electrical conductivity of A-site deficient La2−zCo1+y(MgxNb1−x)1−yO6 double perovskites

28.06.2015 | Author(s): S. Shafeie , B. Dreyer , R.H.P Awater , T. Golod , J. Grins , J.J. Biendicho , S.Ya. Istomin , G. ..., Journal of Solid State Chemistry, 2015

Publication date: September 2015 Source:Journal of Solid State Chemistry, Volume 229 Author(s): S. Shafeie , B. Dreyer , R.H.P Awater , T. Golod , J. Grins , J.J. Biendicho , S.Ya. Istomin , G. Svensson New La-deficient double perovskites with P21/n symmetry, La∼ 1.90(Co2+ 1−x Mg2+ ...

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Irreversible phase transitions due to laser-based T-jump heating of precursor Eu:ZrO2/Tb:Y2O3 core/shell nanoparticles

28.06.2015 | Author(s): Ray Gunawidjaja , Helena Diez-y-Riega , Hergen Eilers, Journal of Solid State Chemistry, 2015

Publication date: September 2015 Source:Journal of Solid State Chemistry, Volume 229 Author(s): Ray Gunawidjaja , Helena Diez-y-Riega , Hergen Eilers Amorphous precursors of Eu-doped-ZrO2/Tb-doped-Y2O3 (p-Eu:ZrO2/p-Tb:Y2O3) core/shell nanoparticles are rapidly heated to temperatures ...

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Precipitating Sodium Dodecyl Sulfate to Create Ultrastable and Stimulable Foams

27.06.2015 | Li Zhang, Alesya Mikhailovskaya, Pavel Yazhgur, François Muller, Fabrice Cousin, Dominique Langevin, Nan Wang, Annii ..., Angewandte Chemie International Edition, 2015

Abstract Ultrastable foams are made very simply by adding salt (NaCl or KCl) to sodium dodecyl sulfate. The addition of high concentrations of salt leads to the precipitation of the surfactant on the bubble surfaces and as crystals in the interstices between the bubbles. As a consequence, the ...

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Direct Evidence for [4+2] Cycloaddition Mechanism of Alkynes to Tantallacyclopentadiene on Dinuclear Tantalum Complexes as a Model of Alkyne Cyclotrimerization

26.06.2015 | Keishi Yamamoto, Hayato Tsurugi, Kazushi Mashima, Chemistry - A European Journal, 2015

Abstract A dinuclear tantalum complex, [Ta2Cl6(μ‐C4Et4)] (2), bearing a tantallacyclopentadiene moiety, was synthesized by treating [(η2‐EtCCEt)TaCl3(DME)] (1) with AlCl3. Complex 2 and its Lewis base adducts, [Ta2Cl6(μ‐C4Et4)L] (L=THF (3 a), pyridine (3 b), THT (3 c)), served as more active ...

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Substituent effect of N‐aryl‐N′‐pyridyl ureas as thermal latent initiators on ring‐opening polymerization of epoxide

26.06.2015 | Naoyuki Makiuchi, Atsushi Sudo, Takeshi Endo, Journal of Polymer Science Part A: Polymer Chemistry, 2015

ABSTRACT A series of N‐aryl‐N′‐pyridyl ureas were synthesized by the reactions of 4‐aminopyridine (4AP) with the corresponding isocyanates such as phenyl isocyanate, 4‐methylphenyl isocyanate, 4‐methoxyphenyl isocyanate, 4‐chlorophenyl isocyanate, 4‐(trifluoromethyl)phenyl isocyanate, and ...

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Reversible Phase Transitions and Dielectric Properties in [(CH3)4P]2[Cr2O7] and ­[Et4P]2[Cr3O10]

25.06.2015 | Ping‐Ping Shi, Qiong Ye, Hui‐Ting Wang, Qiang Li, Da‐Wei Fu, Yi Zhang, European Journal of Inorganic Chemistry, 2015

Abstract Tetramethylphosphonium dichromate ([(CH3)4P]2[Cr2O7], 1) undergoes a reversible phase transition at around 221 K. The results of the variable‐temperature single‐crystal X‐ray structural analyses and the rotational potential energy calculations suggest that the phase transition is ...

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Cobalt-Mediated η5-Pentadienyl/Alkyne [5 + 2] Cycloaddition Reactions: Substitution Effects, Bicyclic Synthesis, and Photochemical η4-Cycloheptadiene Demetalation

25.06.2015 | Kai E. O. Ylijoki; Andrew D. Kirk; Sebastian Böcklein; Ross D. Witherell; Jeffrey M. Stryker, Organometallics, 2015

The preparation of seven-membered carbocycles via traditional organic synthesis is difficult, yet essential, due to the prevalence of these moieties in bioactive compounds. As we report, the Co-mediated pentadienyl/alkyne [5 + 2] cycloaddition reaction generates kinetically stable ...

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Synthesis, characterization and thermoluminescence studies of Mn‐doped ZnS nanoparticles

24.06.2015 | Raju Kumar Chandrakar, R. N. Baghel, B. P. Chandra, Luminescence, 2015

Abstract ZnS:Mn nanoparticles were prepared by a chemical precipitation method and characterized by X‐ray diffraction (XRD), field emission gun scanning electron microscope (FEGSEM), and high resolution transmission electron microscopy (HRTEM). Capping agent (mercaptoethanol) concentrations ...

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Energies, Vol. 8, Pages 6215-6229: Finite Time Analysis of a Tri-Generation Cycle

23.06.2015 | Agnew, Brian ; Walker, Sara ; Ng, Bobo ; Tam, Ivan C. K., Energies, 2015

A review of the literature indicates that current tri-generation cycles show low thermal performance, even when optimised for maximum useful output. This paper presents a Finite Time analysis of a tri-generation cycle that is based upon coupled power and refrigeration Carnot cycles. The analysis ...

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Fabrication and Characterization of Stable Soy β-Conglycinin–Dextran Core–Shell Nanogels Prepared via a Self-Assembly Approach at the Isoelectric Point

23.06.2015 | Ji-Lu Feng; Jun-Ru Qi; Shou-Wei Yin; Jin-Mei Wang; Jian Guo; Jing-Yi Weng; Qian-Ru Liu; Xiao-Quan Yang, Journal of Agricultural and Food Chemistry, 2015

The preparation of soy β-conglycinin–dextran nanogels (∼90 nm) went through two stages, which are safe, facile, and green. First, amphiphilic graft copolymers were formed by dextran covalently attaching to β-conglycinin via Maillard dry-heating reaction. Second, the synthesized conjugates were ...

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