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243 results on '"Shi, Qinqin"'

14. Neogene integrative stratigraphy, biotas, and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

Author

Deng, Tao, primary, Fang, Xiaomin, additional, Li, Qiang, additional, Wang, Shiqi, additional, Wu, Feixiang, additional, Hou, Sukuan, additional, Ma, Jiao, additional, Jiangzuo, Qigao, additional, Sun, Danhui, additional, Zheng, Yan, additional, Shi, Qinqin, additional, Sun, Boyang, additional, and Li, Lu, additional

Published
2023
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15. Frontispiece: An Efficient Direct Arylation Polycondensation via C−S Bond Cleavage

Author

Zhang, Meng, primary, Zhang, Bei‐Bei, additional, Lin, Qijie, additional, Jiang, Ziling, additional, Zhang, Jianqi, additional, Li, Yawen, additional, Pei, Shurui, additional, Han, Xiao, additional, Xiong, Haigen, additional, Liang, Xinyu, additional, Lin, Yuze, additional, Wei, Zhixiang, additional, Zhang, Fengjiao, additional, Zhang, Xin, additional, Wang, Zhi‐Xiang, additional, Shi, Qinqin, additional, and Huang, Hui, additional

Published
2023
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17. An Efficient C−Si/C−H Cross‐Coupling Reaction Enabled by a Radical Pathway.

Author

Mi, Chunchun, Zhang, Bei‐Bei, Zhang, Guanghao, Peng, Aidong, Wang, Zhi‐Xiang, Shi, Qinqin, and Huang, Hui

Subjects
RADICALS (Chemistry), ARYL radicals, COPPER catalysts, SUZUKI reaction
Abstract

The methods for the cross‐coupling of aryl(trialkyl)silanes are long‐standing challenges due to the extreme inertness of C−Si(R3) bond, though the reaction is environmentally friendly and highly regioselective to synthesize biaryls. Herein, we report a copper‐catalyzed cross‐coupling of aryl(trialkyl)silanes and aryl via a radical mechanism. The reaction proceeds efficiently with aryl sulfonium salts as limiting reagents, exhibits broad substrate scope, and provides an important synthetic strategy to acquire biaryls, exemplified by unsymmetrical fluorescence probes and late‐stage functionalization of drugs. Of note, the experimental and theoretical mechanistic studies revealed a radical mechanism where the copper catalyst and CsF play critical roles on the radical generation and desilylation process. [ABSTRACT FROM AUTHOR]

Published
2024
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19. An Efficient Direct Arylation Polycondensation via C−S Bond Cleavage

Author

Zhang, Meng, primary, Zhang, Bei‐Bei, additional, Lin, Qijie, additional, Jiang, Ziling, additional, Zhang, Jianqi, additional, Li, Yawen, additional, Pei, Shurui, additional, Han, Xiao, additional, Xiong, Haigen, additional, Liang, Xinyu, additional, Lin, Yuze, additional, Wei, Zhixiang, additional, Zhang, Fengjiao, additional, Zhang, Xin, additional, Wang, Zhi‐Xiang, additional, Shi, Qinqin, additional, and Huang, Hui, additional

Published
2023
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22. The design, synthesis and application of rubicene based polycyclic aromatic hydrocarbons (PAHs).

Author

Ma, Liangzhuo, Han, Yinghui, Shi, Qinqin, and Huang, Hui

Abstract

Rubicene, a key nanofragment of C70, is attracting great attention owing to its unique molecular structure and physicochemical properties. As an indeno-annelated polycyclic aromatic hydrocarbon (indeno-PAH), rubicene itself has a planar p-orbital surface that could provide increased intermolecular electronic coupling, affording interesting optoelectronic properties. Interestingly, most of the substituted and aryl annulated rubicene PAHs possess twisted structures, which may demonstrate different optoelectronic properties. To date, many efforts have been made in the synthesis of rubicene PAHs, which demonstrate potential applications in organic field effect transistors (OFETs), organic solar cells (OSCs), sensors, lithium batteries, etc. However, the functionalization of rubicene remains a long-standing challenge from the synthetic perspective. In this mini-review, we summarized the major synthetic routes to construct rubicene PAHs, their physicochemical properties, and various applications. In the end, we propose a future direction on the development of rubicene PAHs. [ABSTRACT FROM AUTHOR]

Published
2023
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23. Room Temperature Anhydrous Suzuki–Miyaura Polymerization Enabled by C−S Bond Activation.

Author

Wen, Xuan, Xie, Wenbin, Li, Yawen, Ma, Xiaoying, Liu, Zhaoying, Han, Xiao, Wen, Kaikai, Zhang, Fengjiao, Lin, Yuze, Shi, Qinqin, Peng, Aidong, and Huang, Hui

Subjects
ARYL esters, BORONIC esters, CONJUGATED polymers, SMALL molecules, SUZUKI reaction, POLYMERIZATION
Abstract

The Suzuki–Miyaura cross‐coupling is one of the most important and powerful methods for constructing C−C bonds. However, the protodeboronation of arylboronic acids hinder the development of Suzuki–Miyaura coupling in the precise synthesis of conjugated polymers (CPs). Here, an anhydrous room temperature Suzuki–Miyaura cross‐coupling reaction between (hetero)aryl boronic esters and aryl sulfides was explored, of which universality was exemplified by thirty small molecules and twelve CPs. Meanwhile, the mechanistic studies involving with capturing four coordinated borate intermediate revealed the direct transmetalation of boronic esters in the absence of H2O suppressing the protodeboronation. Additionally, the room temperature reaction significantly reduced the homocoupling defects and enhanced the optoelectronic properties of the CPs. In all, this work provides a green protocol to synthesize alternating CPs. [ABSTRACT FROM AUTHOR]

Published
2023
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24. An efficient direct arylation polycondensation via C-S bond cleavage

Author

Zhang, Meng, primary, Zhang, Bei-Bei, additional, Lin, Qijie, additional, jiang, ziling, additional, Zhang, Jianqi, additional, Li, Yawen, additional, Pei, Shurui, additional, Han, Xiao, additional, Xiong, Haigen, additional, Liang, Xinyu, additional, Lin, Yuze, additional, Wei, Zhixiang, additional, Zhang, Fengjiao, additional, Zhang, Xin, additional, Wang, Zhixiang, additional, Shi, Qinqin, additional, and Huang, Hui, additional

Published
2023
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26. Air Stable Chalcogen-Doped Rubicenes with Diradical Character

Author

Ma, Liangzhuo, primary, Wang, Song, additional, Li, Yuan, additional, Shi, Qinqin, additional, Xie, Wenbin, additional, Chen, Hao, additional, Wang, Xin, additional, Zhu, Weiya, additional, Jiang, Lang, additional, Chen, Runfeng, additional, Peng, Qian, additional, and Huang, Hui, additional

Published
2022
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30. The Aryl Sulfide Synthesis via Sulfide Transfer

Author

Liang, Xinyu, primary, Wen, Kaikai, additional, Shi, Qinqin, additional, Zhang, Bei‐Bei, additional, Pei, Shurui, additional, Lin, Qijie, additional, Ma, Bowei, additional, Wang, Song, additional, Zhang, Meng, additional, Li, Xiang, additional, Wang, Zhi‐Xiang, additional, and Huang, Hui, additional

Published
2022
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38. Simple Nonfused‐Ring Electron Acceptors with Noncovalently Conformational Locks for Low‐Cost and High‐Performance Organic Solar Cells Enabled by End‐Group Engineering

Author

Li, Congqi, primary, Zhang, Xin, additional, Yu, Na, additional, Gu, Xiaobin, additional, Qin, Linqing, additional, Wei, Yanan, additional, Liu, Xingzheng, additional, Zhang, Jianqi, additional, Wei, Zhixiang, additional, Tang, Zheng, additional, Shi, Qinqin, additional, and Huang, Hui, additional

Published
2021
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43. Integrative Neogene stratigraphy, biotas and paleogeographic evolution of the Tibetan Plateau and its surrounding area

Author

Deng, Tao, Fang, Xiaomin, Li, Qiang, Wang, Shiqi, Wu, Feixiang, Hou, Sukuan, Ma, Jiao, Jiangzuo, Qigao, Sun, Danhui, Zheng, Yan, Shi, Qinqin, Sun, Boyang, and Li, Lu

Abstract

The remarkable uplift of the Tibetan Plateau in the Neogene had great impacts on the climate and environment of East Asia and even the world. Therefore, establishment of the Neogene stratigraphic framework of the Tibetan Plateau is of great significance to research in various fields of geosciences. Based on marine sediments, the international chronostratigraphic system of the Neogene is divided into six stages in the Miocene and two stages in the Pliocene. Since the beginning of the Cenozoic, the share of terrestrial strata on continents has increased rapidly. By the Neogene, it had far exceeded that of marine strata, and almost all deposits on the Tibetan Plateau and its surrounding areas were terrestrial strata. In China, the Miocene includes five stages and the Pliocene includes two stages. Except for the Tunggurian of the Miocene, which has a lower boundary at 15 Ma, the other stages have the same paleomagnetic definitions and time intervals as the corresponding international marine stages. Mammalian fossils play a very important role in the division and correlation of Cenozoic terrestrial strata, and rodent, carnivore, proboscidean, perissodactyl and artiodactyl fossils are especially important in Neogene terrestrial biostratigraphy. There are many basins with well-exposed strata and abundant mammalian fossils in the Tibetan Plateau. The lower boundary stratotype sections of the Neogene Xiejian and Bahean stages are located respectively in the Xining and Linxia basins, and there are precise paleomagnetic dates in coordination with mammalian fossils. The lower boundary stratotypes of other stages can also be effectively determined in the Tibetan Plateau. Many first appearing mammalian genera in East Asia also appeared in the Tibetan Plateau and its surrounding areas, especially in the Linxia Basin on the northeast margin and in the Siwaliks on the southwest margin. Among them, Prodeinotheriumfirst appeared at the bottom of the Miocene in the Siwaliks, and the earliest Hipparionof the Old World first appeared at the bottom of the Bahean Stage in the Linxia Basin. Carbon and oxygen isotope analysis of enamel and paleosols of Cenozoic sediments and mammal fossils in the Tibetan Plateau and its surrounding areas have been used to reconstruct the climate, environment and vegetation development characteristics, and revealed that these changes were not only related to global change, but also had regional features. Evidence of the Late Miocene C4plant expansion event based on carbon isotope changes comes from the southern margin of the Tibetan Plateau, but in sharp contrast, δ13C indicates that there was still no clear or significant C4plant signal on the northern margin of the Tibetan Plateau until the end of the Neogene. The δ18O analysis shows that there were several major climate change events in the Cenozoic, especially in the Late Miocene at about 7 Ma, when positive drift of δ18O indicates that the northern and southern sides of the Tibetan Plateau were changing to drier environments. The strong uplift of the Tibetan Plateau in the Late Miocene strengthened the thermal contrast between sea and land, which strengthened monsoon circulation and led to the expansion of C4vegetation in South Asia. However, the East Asian summer monsoon, which can bring atmospheric precipitation and a climate suitable for C4plants to northern China, was not enough to affect the northern Tibetan Plateau. The Tibetan Plateau on the whole rose to an altitude of about 3000 m in the Miocene, becoming a barrier to mammalian migration; it reached its modern altitude of more than 4000 m in the Pliocene, thus forming a cryosphere environment, which led to the emergence of ancestral types of the Ice Age fauna.

Published
2023
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50. Synthetic Routes for Heteroatom‐Containing Alkylated/Arylated Polycyclic Aromatic Hydrocarbons

Author

Shi, Qinqin, primary, Shi, Xiaosong, additional, Feng, Changfu, additional, Wu, Yishi, additional, Zheng, Nan, additional, Liu, Jie, additional, Wu, Xiaoxi, additional, Chen, Hao, additional, Peng, Aidong, additional, Li, Jianfeng, additional, Jiang, Lang, additional, Fu, Hongbing, additional, Xie, Zengqi, additional, Marder, Seth R., additional, Blakey, Simon B., additional, and Huang, Hui, additional

Published
2020
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