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120 results on '"Chen, Shu"'

1. ChemInform Abstract: Dielectric Relaxations in Multiferroic La2Ti2O7Ceramics

Author

C.C. Wang, Chen-Shu Cheng, Yi Yu, Shouguo Huang, Jun Zheng, Qiuju Li, and N. Zhang

Subjects
Condensed matter physics, Chemistry, visual_art, visual_art.visual_art_medium, Relaxation (physics), Multiferroics, General Medicine, Ceramic, Activation energy, Dielectric, Atmospheric temperature range, Thermal conduction, Polaron
Abstract

La2Ti2O7 ceramic samples were prepared via conventional solid-state reaction route. The dielectric properties of La2Ti2O7 were investigated as functions of temperature (113–1073 K) and frequency (100 Hz–1 MHz). Our results revealed that La2Ti2O7 ceramics exhibit intrinsic dielectric response with a dielectric constant of ∼57 in the temperature range below 250 K. Three thermally activated dielectric relaxations were observed when the temperature higher than 250 K. The low-temperature relaxations R1 with the activation energy of 0.38 eV is found to be a polaron relaxation results from hopping holes. The high-temperature relaxations R2 and R3 are related to the conduction progress associated with the singly and doubly ionized oxygen vacancies, respectively.

Published
2015

45. ChemInform Abstract: A Base-Controlled Chemoselective Transfer Hydrogenation of α,β-Unsaturated Ketones Catalyzed by [IrCp*Cl2]2 with 2-Propanol.

Author

Chen, Shu‐jie, Lu, Guo‐ping, and Cai, Chun

Subjects
*KETONES, *HYDROGENATION, *CATALYSIS
Abstract

Depending on the base, a wide range of α,β-unsaturated ketones are reduced to saturated ketones or alcohols by using a simple homogeneous catalytic system based on the commercially available Iridium catalyst under optimized reaction conditions. [ABSTRACT FROM AUTHOR]

Published
2015
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46. ChemInform Abstract: Gold-Catalyzed [1,5]-Hydride Shift onto Unactivated Alkynes to Trigger an Intermolecular Diels-Alder Reaction.

Author

Wu, Xiang, Chen, Shu‐Sen, Hu, Yue, and Gong, Liu‐Zhu

Subjects
*ALKYNES
Abstract

The article presents chemical equations related to the article "Gold-Catalyze [1,5]-Hydride Shift onto Unactivated Alkynes to Trigger an Intermolecular Diels-Alder Reaction" by X. Wu and others, published in the periodical "Organic Letters" in 2014.

Published
2015
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47. ChemInform Abstract: An Efficient Transition-Metal-Chloride/Sodium-Nitrite/TEMPO Catalytic System for Aerobic Oxidative Aromatization of Hantzsch 1,4-Dihydropyridines.

Author

Lou, Bin‐Hui, Chen, Shu‐Bin, Wang, Jian, Chen, Ying, and Li, Jing‐Hua

Subjects
*TRANSITION metals, *CHLORIDES, *SODIUM nitrites, *CATALYTIC oxidation, *AROMATIZATION, *DIHYDROPYRIDINE, *QUINOLINE derivatives, *SALTS
Abstract

MnCl2, NiCl2, FeCl3, and several Cu(I) and Cu(II) salts are disclosed as efficient oxidation catalysts for 1,4-dihydropyridines. [ABSTRACT FROM AUTHOR]

Published
2014
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