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200 results on '"Zhang, Han‐Yue"'

6. Iron-Catalyzed Deboronation/Cyanoalkylation of Vinyl Boronic Acids with Cyclobutanone Ketoximes.

Author

Zhang, Hua-Wei, Wang, Yu-Zhao, Cheng, Xiu-Fen, Zhang, Han-Yue, Wang, Zi-Ying, Xu, Nuo, Su, Yan-Qi, and Li, Yan

Subjects
BORONIC acids, SCISSION (Chemistry), RADICALS (Chemistry), OXIMES, ALKENES
Abstract

In this paper, an iron-catalyzed deboronation/cyanoalkylation of vinyl boronic acids for the preparation of distal cyanoalkyl alkenes with vinyl boronic acids as radical acceptor and activator is reported. In this reaction, various cyclobutanone oximes and substituted vinyl boronic acids can be transformed into the corresponding cyanoalkylated alkenes in moderate to good yields under these conditions. Mechanistic studies indicated that a single-electron transfer process may be involved in this transformation. [ABSTRACT FROM AUTHOR]

Published
2024
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8. Organic Ferroelastic with Dual‐Channel Manipulation Obtained by H/F Substitution.

Author

Xu, Yu‐Qiu, Lan, Jin‐Fei, Mao, Wei‐Xin, Zhou, Long‐Xing, Deng, Xin, Chen, Xiao‐Gang, and Zhang, Han‐Yue

Subjects
PHASE transitions, TRANSITION temperature, ENVIRONMENTAL protection, ENERGY conversion, ENERGY consumption
Abstract

Ferroelastic materials with high phase transition temperature have broad application prospects in information conversion and storage, shape memory, energy conversion, hyperelasticity, etc. However, most of the current reports focus on inorganic ferroelastic materials. Inorganic ferroelastic materials have the disadvantages of high energy consumption and harmful metals, which limit their application in practical work. In contrast, organic ferroelastic materials have the advantages of structural adjustability, environmental protection, easy processing, low cost, mechanical flexibility, and so on, which have great development potential in new ferroelastic materials. Here, we have successfully designed and synthesized a pair of homochiral enantiomers [(R/S)‐4‐fluorobenzoic acid‐2‐amino‐2‐phenylethanol] (R‐ and S‐F) using the chemical design strategy of H/F substitution. Compared with the non‐F substitution [(R/S)‐benzoic acid‐2‐amino‐2‐phenylethanol] (R‐ and S‐H), they undergo 2F1‐type ferroelastic phase transitions at 370 K. Notably, the ferroelastic domains of R/S‐F can be controlled through two physical channels that are temperature and stress, showing great potential in dual‐channel switches. [ABSTRACT FROM AUTHOR]

Published
2024
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9. H/F substitution achieves high piezoelectricity in enantiomeric molecular crystals.

Author

Mao, Wei-Xin, Zhou, Long-Xing, Deng, Xin, Lan, Jin-Fei, Song, Xian-Jiang, and Zhang, Han-Yue

Subjects
MECHANICAL energy, MOLECULAR crystals, PIEZOELECTRIC materials, HARVESTING machinery, CRYSTALS, ENERGY harvesting
Abstract

Here, we successfully synthesized a pair of enantiomeric molecular piezoelectric materials by H/F substitution strategy. These compounds show a large piezoelectric coefficient d33 value of 25 pC N−1 measured by the quasi-static method. A simple energy harvesting device was fabricated based on this crystal, showing great potential in piezoelectric mechanical energy harvesters. [ABSTRACT FROM AUTHOR]

Published
2024
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13. Association between type 2 diabetes mellitus and body composition based on MRI fat fraction mapping

Author

An, Qi, primary, Zhang, Qin-He, additional, Wang, Yue, additional, Zhang, Han-Yue, additional, Liu, Yu-Hui, additional, Zhang, Zi-Ting, additional, Zhang, Mei-Ling, additional, Lin, Liang-Jie, additional, He, Hui, additional, Yang, Yi-Fan, additional, Sun, Peng, additional, Zhou, Zhen-Yu, additional, Song, Qing-Wei, additional, and Liu, Ai-Lian, additional

Published
2024
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14. Predicting bioactive compounds and cancer-related molecular targets of lotus seedpod (Receptaculum Nelumbinis) based on network pharmacology and molecular docking

Author

Shen, Jian-Lin, primary, Zhang, Meng-Tong, additional, Li, Fei, additional, Huang, Jia-Yu, additional, Xu, Quan-Sheng, additional, Zhang, Han-Yue, additional, Zhang, Jun, additional, Li, Jing, additional, Li, Yan-Ping, additional, Zou, Qi, additional, and Wang, Xiao-Yin, additional

Published
2024
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16. Modulating the ferroelectric phases in cholesteryl-based organic compounds with perfluoroalkyl tail engineering.

Author

Jiang, Huan-Huan, Zhang, Nan, Mao, Wei-Xin, Lan, Jin-Fei, Zhou, Long-Xing, Xu, Hua-Ming, Zhang, Han-Yue, and Liao, Wei-Qiang

Subjects
FLUOROALKYL compounds, FERROELECTRIC crystals, ORGANIC compounds, PHASE transitions, ENGINEERING
Abstract

Here, we synthesized a series of cholesteryl-based compounds, whose phases and their transformation can be modulated by temperature and the chain length of the fluoroalkyl moieties. To our knowledge, this is the first time that the phase transition could be modulated with perfluoroalkyl tail engineering in organic single-component ferroelectric crystals. [ABSTRACT FROM AUTHOR]

Published
2024
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32. High-TcSingle-Component Organosilicon Ferroelectric Crystal Obtained by H/F Substitution

Author

Peng, Hang, Yu, Hang, Tang, Shu-Yu, Zeng, Yu-Ling, Li, Peng-Fei, Tang, Yuan-Yuan, Zhang, Zhi-Xu, Xiong, Ren-Gen, and Zhang, Han-Yue

Abstract

Organic single-component ferroelectrics are highly desirable for their low molecular mass, light weight, low processing temperature, and excellent film-forming properties. Organosilicon materials with a strong film-forming ability, weather resistance, nontoxicity, odorlessness, and physiological inertia are very suitable for device applications related to the human body. However, the discovery of high-Tcorganic single-component ferroelectrics has been very scarce, and the organosilicon ones even less so. Here, we used a chemical design strategy of H/F substitution to successfully synthesize a single-component organosilicon ferroelectric tetrakis(4-fluorophenylethynyl)silane (TFPES). Systematic characterizations and theory calculations revealed that, compared with the parent nonferroelectric tetrakis(phenylethynyl)silane, fluorination caused slight modifications of the lattice environment and intermolecular interactions, inducing a 4/mmmFmm2-type ferroelectric phase transition at a high Tcof 475 K in TFPES. To our knowledge, this Tcshould be the highest among the reported organic single-component ferroelectrics, providing a wide operating temperature range for ferroelectrics. Moreover, fluorination also brought about a significant improvement in the piezoelectric performance. Combined with excellent film properties, the discovery of TFPES provides an efficient path for designing ferroelectrics suitable for biomedical and flexible electronic devices.

Published
2023
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33. Ferroelectrochemistry

Author

Mu, Xin, primary, Zhang, Han-Yue, additional, Xu, Lei, additional, Xu, Yi-Yi, additional, Peng, Hang, additional, Tang, Yuan-Yuan, additional, and Xiong, Ren-Gen, additional

Published
2021
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38. Enantioselective Pd-catalyzed dearomative reductive Heck and domino Heck–Suzuki reactions of 2-CF3-indoles.

Author

Liang, Ren-Xiao, Chen, Jian-Fei, Huang, Ying-Ying, Yu, Ya-Ping, Zhang, Han-Yue, Song, Yu-Feng, Tsui, Gavin Chit, and Jia, Yi-Xia

Subjects
HECK reaction, INDOLINE, CATALYSTS, HYDRIDES
Abstract

Highly enantioselective palladium-catalyzed dearomative reductive Heck reaction and domino Heck–Suzuki reaction of 2-CF3-indoles have been developed. Using Pd(OAc)2/(R)-Synphos as the catalyst and Et3SiH as a hydride source, a variety of indolines bearing a 2-trifluoromethyl quaternary stereocenter were obtained via a dearomative reductive Heck reaction. Alternatively, using Pd(dba)2/phosphoramidite as the catalyst and Ar4BNa as a coupling partner, structurally diverse indolines containing two vicinal carbon stereocenters were afforded through the domino dearomative Heck–Suzuki reaction. [ABSTRACT FROM AUTHOR]

Published
2022
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39. [(Histamine)(18-crown-6)2][BF4]2 is a high-temperature piezoelectric.

Author

Li, Yi-Rong, Zhang, Yun-Fang, Tang, Yuan-Yuan, and Zhang, Han-Yue

Subjects
PHASE transitions, HISTAMINE, INCLUSION compounds, FERROELECTRICITY
Abstract

We discovered that [(histamine)(18-crown-6)2][BF4]2 is a high-temperature host–guest inclusion complex that presents decent piezoelectric properties (d33 = 5 pC/N), undergoes a phase transition at 406 K, and also possesses potential ferroelectricity. This work provides a new idea for constructing host–guest inclusion piezoelectrics. [ABSTRACT FROM AUTHOR]

Published
2022
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48. Optimizing diagnostic strategy for novel coronavirus pneumonia, a multi-center study in Eastern China

Author

Ai, Jing-Wen, primary, Zhang, Hao-Cheng, additional, Xu, Teng, additional, Wu, Jing, additional, Zhu, Mengqi, additional, Yu, Yi-Qi, additional, Zhang, Han-Yue, additional, Li, Yang, additional, Zhou, Xian, additional, Shen, Zhongliang, additional, Zang, Guo-Qing, additional, Xu, Jie, additional, Chen, Wen-Jing, additional, Li, Yong-Jun, additional, Xie, De-Sheng, additional, Zhou, Ming-Zhe, additional, Sun, Jing-Ying, additional, Chen, Jia-Zhen, additional, and Zhang, Wen-Hong, additional

Published
2020
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50. A Molecular Thermochromic Ferroelectric

Author

Liu, Jun‐Chao, primary, Liao, Wei‐Qiang, additional, Li, Peng‐Fei, additional, Tang, Yuan‐Yuan, additional, Chen, Xiao‐Gang, additional, Song, Xian‐Jiang, additional, Zhang, Han‐Yue, additional, Zhang, Yi, additional, You, Yu‐Meng, additional, and Xiong, Ren‐Gen, additional

Published
2020
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