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Your search keyword '"Chu, Zhiwen"' showing total 14 results
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14 results on '"Chu, Zhiwen"'

1. Dissecting Sperm Mitochondrial G-Quadruplex Structures Using a Fluorescent Probe Biomarker to Monitor and Regulate Fertilization Capability

Author

Wu, Sixian, primary, Li, Xiaoliang, additional, Huang, Gelin, additional, Guo, Juncen, additional, Zhang, Xueguang, additional, Liao, Lu, additional, Zhi, Weiwei, additional, Li, Kun, additional, Wang, Yan, additional, Chu, Zhiwen, additional, Shang, Lijun, additional, Yu, Xiaoqi, additional, Yu, Kangkang, additional, and Xu, Wenming, additional

Published
2023
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5. Effect of film thickness on the electrical and ethanol sensing characteristics of LaFeO3 nanoparticle-based thick film sensors

Author

Yongjia Zhang, Ensi Cao, Wentao Hao, Chu Zhiwen, Li Sun, and Huihui Wang

Subjects
Materials science, Process Chemistry and Technology, Nanoparticle, Working temperature, 02 engineering and technology, Activation energy, 010402 general chemistry, 021001 nanoscience & nanotechnology, Microstructure, Polaron, 01 natural sciences, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Matrix (chemical analysis), Materials Chemistry, Ceramics and Composites, Charge carrier, Composite material, 0210 nano-technology, Selectivity
Abstract

LaFeO 3 nanoparticles were prepared by a sol-gel method and chosen as sensing material. A series of thick film sensors were fabricated with one to six layers of LaFeO 3 nanoparticles in the thickness of 40–234 µm, so as to study the effect of film thickness on the electrical and ethanol sensing characteristics of LaFeO 3 nanoparticle-based thick film sensors. FE-SEM was used to measure the film thickness, and to characterize surface morphology and microstructure inside the sensing matrix. The reduced resistance with increasing film thickness is macroscopically ascribed to the increment of cross-section area for the flowing of charge carriers and is microscopically attributed to the reduction of activation energy for the hopping of small polarons. As for the sensing performance towards ethanol, i.e. prime working temperature, gas response, dynamic response, and gas selectivity, the optimal film thickness depends on the required sensor parameters. Taken together, the sensor with the film thickness of approximately 117 µm showed the best performance, with a fast dynamic response, high gas response and satisfactory selectivity.

Published
2018

8. Diverse synthesis of the C ring fragment of bryostatins viaZn/Cu-promoted conjugate addition of α-hydroxy iodide with enone

Author

Chu, Zhiwen, Tong, Ruiqi, Yang, Yufan, Song, Xuanyi, Hu, Tian bao, Fan, Yu, Zhao, Chen, Gao, Lu, and Song, Zhenlei

Abstract

A convergent approach to 1,5-hydroxy ketones, the general precursors for constructing the C ring of bryostatins, has been developed viaa Zn/Cu-promoted conjugate addition of α-hydroxy iodides with enones. The approach not only leads to diverse synthesis of C ring analogs, but also enables a more concise synthesis of the known C ring intermediate in our total synthesis of bryostatin 8.

Published
2021
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11. Total Synthesis of Bryostatin 8 Using an Organosilane‐Based Strategy.

Author

Zhang, Yuebao, Guo, Qianyou, Sun, Xianwei, Lu, Ji, Cao, Yanjun, Pu, Qiang, Chu, Zhiwen, Gao, Lu, and Song, Zhenlei

Subjects
SILANE, RING formation (Chemistry), NATURAL products, PYRAN, STEREOSELECTIVE reactions, CHEMICAL synthesis
Abstract

Abstract: Convergent total synthesis of bryostatin 8 has been accomplished by an organosilane‐based strategy. The C ring is constructed stereoselectively through a geminal bis(silane)‐based [1,5]‐Brook rearrangement, and the B ring through geminal bis(silane)‐based Prins cyclization, thus efficiently joining the northern and southern parts of the molecule. [ABSTRACT FROM AUTHOR]

Published
2018
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14. Total Synthesis of Bryostatin 8 Using an Organosilane-Based Strategy.

Author

Zhang Y, Guo Q, Sun X, Lu J, Cao Y, Pu Q, Chu Z, Gao L, and Song Z

Abstract

Convergent total synthesis of bryostatin 8 has been accomplished by an organosilane-based strategy. The C ring is constructed stereoselectively through a geminal bis(silane)-based [1,5]-Brook rearrangement, and the B ring through geminal bis(silane)-based Prins cyclization, thus efficiently joining the northern and southern parts of the molecule., (© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.)

Published
2018
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