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“Click”Polymerization

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“Click”Polymerization

2009年全国高分子学术论文报告会

作者： Anjun Qin and ben zhong tang department of chemistry,The hong kong university of science & technology,Clear Water Bay, Kowloon,hong kong,China,and Key Laboratory of Macromolecular Synthesis and Functionalization of the Ministry of Education,department of Polymer science and Engineering, Zhejiang university,Hangzhou 310027,China

＜正＞Alkyne-azide"click"reaction is a powerful synthetic tool and has been found wide spread applications in the areas of chemical,biological and materials *** reaction has also been employed by polymer scientists but the efforts have been mainly in polymer reactions for the modifications of preformed *** this work,we aim at developing the click reaction into a

关键词： Polymer Synthesis Regioregularity Functional Polymers Polytriazoles Hyperbranched Polymers

聚集诱导发光的主链液晶聚三唑:点击聚合,介晶堆积,和固相发光

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聚集诱导发光的主链液晶聚三唑:点击聚合,介晶堆积,和固相发光

2012年两岸三地高分子液晶态与超分子有序结构学术研讨会（暨第十二届全国高分子液晶态与超分子有序结构学术论文报告会）

作者： ben zhong tang~(a,b) a department of chemistry,The hong kong university of science & technology,Clear Water Bay,Kowloon,hong kong,China b department of Polymer science & Engineering,Zhejiang university,Hangzhou, Zhejiang 310027,China

本文设计并合成了含联苯基团的二叠氮单体和含四苯基乙烯单元的二炔单体,进一步通过在THF或DMF中Cu(PPh)Br催化的"点击"聚合,以高达94.8%的产率得到了可溶的,区域规整的,分子量大且分布窄的聚三唑。聚合物的结构和性质均通过IR,NMR,UV,P... 详细信息

本文设计并合成了含联苯基团的二叠氮单体和含四苯基乙烯单元的二炔单体,进一步通过在THF或DMF中Cu(PPh)Br催化的"点击"聚合,以高达94.8%的产率得到了可溶的,区域规整的,分子量大且分布窄的聚三唑。聚合物的结构和性质均通过IR,NMR,UV,PL,TGA,DSC,POM和XRD等方法进行了表征和分析。该类聚合物在溶液状态中几乎不发光,但在不良溶剂或固态薄膜中发光显著增强,表现出新颖的聚集诱导发光行为。该类聚合物的光物理性质与结构密切相关,其固态发光的量子产率随着连接联苯和四苯基乙烯基团的柔性链的增长而下降。含有刚性主链的聚合物表现出向列式液晶排列,而含有较长柔性间隔基的聚合物则表现出介晶排列,且在高温下形成层列式液晶排列。

关键词：聚三唑点击聚合聚集诱导发光液晶聚合物

Multicomponent polymerization of elemental sulfur,difluoromethylene phosphobetaine and aryl silyl ethers toward aromatic poly(O,O′-monothiocarbonate)s

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science China chemistry 2025年

作者： Yongjiang Yu Rongrong Hu ben zhong tang State Key Laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates South China University of Technology School of science and Engineering Shenzhen Institute of Aggregate Science and Technology The Chinese University of Hong Kong AIE Institute

Polythiocarbonates with similar structures to polycarbonates, have emerged as a group of promising sulfur-containing polymers with a range of practical applications, taking advantages of their excellent optical properties, good thermal stability and filmforming ability, and so on. However, the synthesis of polythiocarbonates generally suffered from mixed isomeric structures of repeating units, and hazardous sulfur-containing reagents. In this work, an efficient multicomponent reaction of elemental sulfur,difluoromethylene phosphobetaine（PDFA）, and aryl silyl ethers was designed with the assistance of organic base 7-methyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene（MTBD） to produce 12 kinds of O,O′-monothiocarbonate compounds in up to 93% yields,taking advantages of the unique chemical property of difluorocarbene, and the deprotection of silyl group by F-generated from PDFA. Most importantly, the MTBD-assisted multicomponent polymerization of bis（aryl silyl ether）s, elemental sulfur, and PDFA was developed, affording 12 kinds of poly（O,O′-monothiocarbonate）s with well-defined structures, high Mws of up to16900 g/mol and high yields（up to 99%）. These poly（O,O′-monothiocarbonate）s possessed good film-forming properties and thermal stability, high light refractive indices and transmittance. The facile synthesis of these polymonothiocarbonates might pave the way for the development of promising sulfur-containing polymer materials.

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Synthesis and optical limiting in copolymers of C_(60) and 1-phenyl-1-butyne

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Chinese Chemical Letters 2000年第1期11卷 21-22页

作者： hong Yao XU Shan Yi GUANG ben zhong tang (department of chemistry, Anhui university, Hefei 230039 department of chemistry, hong kong university of science & technology, Clear Water Bay, Kowloon, hong kong) department of chemistry Anhui University Hefei 230039 China department of chemistry Hong Kong Univ. of Sci. and Technol. Clear Water Bay Kowloon Hong Kong

While WC_16-Ph_4Sn is a poor catalyst for the polymerization of l-phenyl-butyne (PB) at room temperature, it effectively polymerizes PB in the presence of C_(60), giving high molecular weight polymers in high yields. The polymer is soluble in THF and chloroform and spectroscopic analysis reveals that Coo has copolymerized with PB. Thus, C_(60) plays dual roles of comonomer and cocatalyst in the acetylene polymerization. The copolymers strongly attenuate 532-nm laser pulses, whose limiting performance is superior to that of parent C_(60)

关键词： C_(60) polyacetylene fullerene polymer.

MECHANICAL PERTURBATION INDUCED MOLECULAR ALIGNMENTS IN A SIDE-CHAIN LIQUID CRYSTALLINE POLYACETYLENE, POLY{10-[4-(4'-METHOXYPHENOXY-CARBOML)PHENOXYCARBONYL]-1-DECYNE}

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Chinese Journal of Polymer science 1999年第3期17卷 289-294页

作者： ben-zhong tang Xiang-xing kong Xin-de Feng department of chemistry, hong kong university of science & technology, Clear Water Bay, Kowloon, hong kong, China department of Polymer science & Engineering, College of chemistry, Peking university, Beijing 100871, China department of chemistry Hong Kong University of Science and Technology Kowloon Clear Water Bay Hong Kong department of Polymer science and Engineering College of Chemistry Peking University Beijing 100871 China

A new liquid crystalline polyacetylene containing a phenyl benzoate mesogen (5) is synthesized,whose mesomorphic properties are found to be easily 'tunab1e' by simple mechanical perturbation. Thepolymerization of 10- [ 4 - (4' -methoxyphenoxycarbonyl )phenoxycarbonyl] - 1 -decyne (4 ) in itiated by theWCl_6-Ph_4Sn/dioxane complex yields polymer 5 with a M_w of 28400. The molecular structure of 5 ischaracterized by NMR, IR, and UV spectroscopy and its liquid crystalline behavior is investigated by DSC,POM, and XRD analysis. Upon mechanical perturbation, 5 exhibits unusual agitation-induced high-strengthdisclinations, shear-induced inversion walls, and solidification-induced banded textures. Such phenomenahave been observed in the main-chain liquid crystalline polymers with rigid backbones, but have seldom beenreported for the side-chain liquid crystalline polymers with flexible backbones, suggesting that the rigidpolyacetylene backbone of 5 plays a constructive role in inducing the novel molecular alignments.

关键词： Liquid crystals Side-chain liquid crystalline polymers Polyacetylenes High-strength disclinations Inversion walls Banded textures Molecular alignments

Specific staining and precise killing of cancer cells through fusion of pharmaceutical chemistry and π-bridge effect design philosophy

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science China chemistry 2025年

作者： Qiong Liu Qiyun Deng Changxu Zhu kongqi Chen Lidan Chen Zhaohui Sun ben zhong tang Zhiming Wang AIE Institute Center for Aggregation-Induced Emission State Key Laboratory of Luminescent Materials and Devices Key Laboratory of Luminescence from Molecular Aggregates of Guangdong Province South China University of Technology department of Laboratory Medicine General Hospital of Southern Theater Command School of Life sciences The Chinese University of Hong Kong Shenzhen Institute of Aggregate science and technology School of Science and Engineering The Chinese University of Hong Kong HKUST-Shenzhen Research Institute

The development of an advanced phototheranostic platform that combines imaging and therapy in a single agent is an appealing yet challenging *** this study,we successfully constructed three novel fluorescent probes by leveraging pharmaceutical chemistry and the design philosophy of theπ-bridge *** a systematic comparative analysis of their fluorescence properties,water solubility,molecular conformation,and electrostatic potential,we revealed the fundamental principles governing the optical behavior and biological selectivity of these ***,the probe TPhIQ-CNTh demonstrated extended fluorescence in the near-infrared region,a significant aggregation-induced emission (AIE) effect,and the ability to distinguish tumor cells from normal ***,it efficiently generated reactive oxygen species (ROS) and specifically labeled lipid droplets,enabling the precise staining and killing of cancer *** study presents a practical strategy for designing precise tumor treatments that integrate efficient imaging-guided photodynamic therapy (PDT) by harnessing the unique properties of AIE materials.

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LINEAR AND HYPERBRANCHED POLYMERS WITH HIGH THERMAL STABILITY AND LUMINESCENCE EFFICIENCY

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Chinese Journal of Polymer science 2001年第6期19卷 585-590页

作者： Jacky Wing Yip Lam Jing-dong Luo Han Peng Zhi-liang Xie Kai-tian Xue Yu-ping Dong Lin Cheng Cheng-feng Qiu Hoi Sing Kwok ben-zhong tang departments of chemistry and Electrical & Electronic Engineering hong kong university of science & technology Clear Water Bay, Kowloon, hong kong China 香港科技大学香港

New acetylene monomers, 6-{[(1-naphthylethynyl-4-phenyl)carbonyl]oxy}-1-phenyl-1-hexyne (1), 2,5-diethynyl-thiophene (3), and 4,4'-diethynylbiphenyl (6) were synthesized. Homopolymerization of 1 and copolycyclotrimerizations of 3 and 6 with 1-heptyne and 1-octyne have been achieved with WCl6- and TaCl5-Ph4Sn catalysts, respectively, giving soluble linear disubstituted polyacetylene (2) and hyperbranched polyarylenes (5 and 8) with high molecular weights (up to 1.2 x 10(5)) in high yields (up to 98%). The structures and properties of the polymers are characterized and evaluated by R NMR, TGA, UV, photoluminescence (PL), and electroluminescence (EL) analyses. All the polymers possess high thermal stability and emit strong blue light upon photoexcitation. The intensity of the emitted light is greater than that of poly(1-phenyl-1-octyne), a well-known highly luminescent disubstituted polyacetylene. Little aggregation-induced red shift in the PL was observed in the thin films of the polymers. By constructing a multi-layer EL device, high EL quantum yield (0.18%) has been achieved in 2, which are the best results for substituted polyacetylenes attainable so far.

关键词： disubstituted polyacetylene hyperbranched polyarylene light emission

Stimulus responsive fluorescent hyperbranched polymers and their applications

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science China chemistry 2010年第12期53卷 2409-2428页

作者： WANG Jian 1,MEI Ju 1,QIN AnJun 1,SUN JingZhi 1 & tang ben zhong 1,2 1 MOE Key Laboratory of Macromolecular Synthesis and Functionalization department of Polymer science and Engineering,Institute of Biomedical Macromolecules,Zhejiang university,Hangzhou 310027,China 2 department of chemistry,The hong kong university of science & technology,hong kong,China MOE Key Laboratory of Macromolecular Synthesis and Functionalization department of Polymer science and Engineering Institute of Biomedical Macromolecules Zhejiang University Hangzhou China department of chemistry The Hong Kong University of Science & Technology Hong Kong China

Fluorescent hyperbranched polymers (FHBPs),which combine the versatile fluorescent property with unique characteristics of hyperbranched architecture,are desirable candidates for stimulus responsive *** review demonstrates the structure and environment-dependent emission behaviors of a series of *** active FHBPs showing opposite performance to ACQ effect are used to sensitively detect explosives and a superamplification effect is *** designed FHBPs can complex with metal ions,leading to fluorescence turn-off due to complex quenching *** protonation of amino-containing FHBPs exhibits pH-dependent fluorescence responses to solution *** FHBPs containing responsive moieties are photo-and thermo-sensitive,and show potential applications as smart materials.

关键词： fluorescent hyperbranched polymer explosives and metal ions detection pH responsive optical and thermal sensitive

Biosensors Based on AIE Fluorophores

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Biosensors Based on AIE Fluorophores

2008年两岸三地高分子液晶态与超分子有序结构学术研讨会暨第十次全国高分子液晶态与超分子有序结构学术论文报告会

作者： tang ben-zhong (department of chemistry,The hong kong university of science & technology,Clear Water Bay,Kowloon,hong kong)

While biosensing processes such as molecular beacons require nontrivial effort to covalently label or mark biomolecules,I here present a label-free DNA assay system using a simple dye with aggregation-induced emis- sion(AIE)characteristics as the fluorescent bioprobe.1,1,2,2-Tetrakis[4-(2-bromoethoxy)phenyl]ethene is nonemissive in solution but becomes highly emissive when *** AIE effect is caused by restriction

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