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Chiral Recognition and Resolution Based on Helical Polymers

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Chinese Journal of Polymer Science 2021年第12期39卷 1521-1527页

作者： Hui Zou Qi-Liang wu Li Zhou Xiao-Hua Hou Na Liu zong-quan wu Department of Polymer Science and Engineering School of Chemistry and Chemical EngineeringHefei University of Technology and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction EngineeringHefei 230009China

Helical polymers have attracted a great deal of attention and been extensively investigated due to their various *** of the most importa nt applicati ons of helical polymers is chiral recog nition and resolutio n ofe nan tiomersforthe reas on that a pair of e nan tiomers is comm only with differe nt physiological and toxicological behaviors in biological *** polymers usually prese nt un expected high chiral recogniti on ability to a variety of racemic compo *** more,the chiral recog nition and resolution abilities of the system are depe ndent on the highly ordered helical structures of the helical *** mini review mainly focuses on the recent progress in chiral recognition and resolution based on helical *** synthetic methodology for helical polymers is firstly discussed *** recent advances of chiral recog nition and resoluti on systems based on helical polymers,especially polyacetylenes and polyisocya nides,are *** hope this mini review will in spire more in terest in developing helical polymers and en courage further advances in chiral-related disciplines.

关键词： Helical polymer Chiral recog nition Chiral resolution Polyacetylenes Polyisocyanides

Synthesis of Poly(ethylene glycol) Functionalized Star-shaped Tricationic Imidazolium Based Ionic Liquid

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Chinese Journal of Polymer Science 2015年第2期33卷 245-255页

作者： Di Zhang 殷俊 Fei He Ni-lin Ge zong-quan wu 丁运生 Key Laboratory of Advanced Functional Materials and Devices Anhui Province Department of Polymer Material and Engineering School of Chemistry and Chemical Engineering Hefei University of Technology

We report on the preparation of a well-defined star-shaped tricationic ionic liquid possessing three arms of poly（ethylene glycol） functionalized imidazolium rings. Remarkable solubility was found in most of the organic solvents we used. Thermogravimetric analysis（TGA） exhibited excellent thermal stability and two distinct decomposition temperatures were attributed to two kinds of chemical degradation. Differential scanning calorimetry（DSC） was further employed to investigate the thermal phase transitions, that three different signals（Tg, Tc, and Tm） were shown upon the second heating process. Moreover, CH2Cl2 solution of the ionic liquid expressed an excitation-wavelength dependent fluorescence response, leading to the facile modulation of photoluminescence behavior. This work represents an example of utilizing molecular design to construct novel ionic liquids and endow further potential to be used in the engineering materials.

关键词： Ionic liquid Imidazole Tricationic Excitation-wavelength dependent Photoluminescence

Optically Active Helical Polyisocyanides Bearing Chiral Phosphine Pendants: Facile Synthesis and Application in Enantioselective Rauhut-Currier Reaction

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Chinese Journal of Polymer Science 2018年第2期36卷 163-170页

作者： Li Zhou Ling Shen Jian Huang Na Liu Yuan-Yuan Zhu zong-quan wu Department of Polymer Science and Engineering School of Chemistry and Chemical Engineering and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering Hefei University of Technology School of Material and Chemical Engineering Bengbu University

Three novel enantiopure phenyl isocyanide monomers with BH3-protected phosphine functional group were designed and synthesized. Polymerization of these monomers using a alkyne-Pd（II） complex as a catalyst led to the formation of respective helical polyisocyanides in high yields with controlled molecular weights（Mns） and narrow molecular weight distributions（Mw/Mns）. Removing the protecting BH3 groups afforded helical poly（phenyl isocyanide）s bearing phosphine pendants. Thanks to the chiral induction of monomer, the isolated helical polyisocyanides showed high optical activity, as revealed by circular dichroism（CD） and absorption spectroscopies and polarimetry. The helical structures of these polymers were quite stable in various organic solvents with different polarities and in a wide temperature range. Moreover, these helical polymers could be used as organocatalysts and showed good performance in enantioselective cross Rauhut-Currier reaction. The enantiomeric excess（ee） values of the isolated products of cross Rauhut-Currier reaction could be up to 90%. The polymer organocatalysts could be easily recovered from the reaction mixtures and reused at least five times in the reaction without significant loss of their enantioselectivities and catalytic activities.

关键词： Helical polymer Polyisocyanide Coordination polymerization Polymer catalyst

Synthesis of Cyclic Polyolefin: Ring-Opening Metathesis Polymerization by Binuclear Vanadium Complexes

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Chinese Journal of Chemistry 2021年第5期39卷 1181-1187页

作者： Xiaohua Hou Xiaojian Chen Xiang Gao Lei Xu Hui Zou Li Zhou zong-quan wu Department of Polymer Science and Engineering School of Chemistry and Chemical Engineeringand Anhui Key Laboratory of Advanced Catalytic Materials and Reaction EngineeringHefei University of Technology193 Tunxi RoadHefeiAnhui 230009China

Ring-opening metathesis polymerization(ROMP)of norbornene by binuclear vanadium alkylidene in-situ formed from dialkyl complexes was *** activities were observed by the binuclear system than mononuclear *** the cyclic polymers were obtained and *** is proposed that cyclic binuclear vanadium alkylidene was afforded due to the intramolecular chain-transfer *** size of polymer ring could be adjusted by the vanadium catalyst structure and polymerization *** results were also observed in the ROMP of cyclopentene.

关键词： Metathesis Polymerization Homogeneous catalysis Carbenes Vanadium

A heteropore covalent organic framework for adsorptive removal of Cd(Ⅱ) from aqueous solutions with high efficiency

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Chinese Chemical Letters 2020年第2期31卷 386-390页

作者： Na Liu Liangfeng Shi Xianghao Han Qiao-Yan Qi zong-quan wu Xin Zhao Department of Polymer Science and Engineering School of Chemistry and Chemical Engineeringand Anhui Key Laboratory of Advanced Catalytic Materials and Reaction EngineeringHefei University of TechnologyHefei 230009China CAS Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

A heteropore covalent organic framework(COF) integrating tetraphenylethene skeleton and catechol segment is designed and *** exhibits extremely high stability in water under different pH conditions,which makes it an excellent material for adsorptive removal of Cd(Ⅱ) from aqueous solutions with very fast adsorption kinetics,high uptake capacity,and good recyclability.

关键词： Covalent organic frameworks Heteropore Hierarchical porosity Cd(Ⅱ)removal Water treatment

A supramolecular bottlebrush polymer assembled on the basis of cucurbit[8]uril-encapsulation-enhanced donor-acceptor interaction

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Chinese Chemical Letters 2017年第6期28卷 1167-1171页

作者： Zhi-Jian Yin zong-quan wu Feng Lin Qiao-Yan Qi Xiao-Na Xu Xin Zhao Department of Polymer Science and Engineering School of Chemistry and Chemical EngineeringHefei University of Technology Key Laboratory of Synthetic and Self-assembly Chemistry for Organic Functional Molecules Shanghai Institute of Organic ChemistryChinese Academy of Sciences

A supramolecular bottlebrush polymer has been constructed in water through the self-assembly of a rigid electron-deficient building block and an electron-rich monomer which bears two tetraethylene glycol chains,driven by CB[8]-encapsulation-enhanced donor-acceptor *** as-formed supramolecular bottlebrush polymer has been characterized by -1H NMR titration experiment,UV-vis spectroscopy,DLS and 2D -1H NMR DOSY.

关键词： Self-assembly Supramolecular polymer Cucurbituril Donor-acceptor interaction Bottlebrush polymer

Controlled Synthesis and Self-assembly Properties of Helical Polyisocyanides

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Controlled Synthesis and Self-assembly Properties of Helical...

Toward a Two-Dimensional Supramolecular Organic Framework with High Degree of Internal Order via Amphiphilic Modification

全国第十九届大环化学暨第十一届超分子化学学术讨论会

作者： zong-quan wu School of Chemistry and Chemical Engineering Hefei University of Technology

Artificial helical polymers have attracted great researches attentions in recent years owing to their unique structure and a range of appealing applications. In this context, polyisocyanide is of particular ***, synthesis of helical polyisocyanides with controlled helicity and in precision topological structures is still a great *** this contribution, we report on the precision synthesis of optically active helical polyisocyanide with different topological structures by

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CCS Chemistry 2022年第1期4卷 141-150页

作者： Zhi-Jian Yin Shu-Yan Jiang Na Liu Qiao-Yan Qi zong-quan wu Tian-Guang Zhan Xin Zhao Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032 Department of Polymer Science and Engineering School of Chemistry and Chemical EngineeringHefei University of TechnologyAnhui ProvinceHefei 230009 Key Laboratory of the Ministry of Education for Advanced Catalysis Materials College of Chemistry and Life SciencesZhejiang Normal UniversityJinhua 321004

Solution-phase self-assembly of two-dimensional(2D)networks with a high degree of internal order and long-range periodicity is a great ***,we report a rational design to improve 2D self-assembly in water through amphiphilic modification of the building *** amphiphilic tritopic molecule(1)is designed and synthesized by introducing three hydrophilic oligo(ethylene glycol)moieties and three hydrophobic hexyl *** assembly of 1 and cucurbit[8]uril(CB[8])leads to the formation of a Janus 2D supramolecular organic framework(SOF),which further creates unique bilayer supramolecular networks and exhibits an unprecedentedly high degree of internal order and long-range *** contrast,the assembly of a nonamphiphilic analog(2)with CB[8]only generates a 2D SOF with a lower degree of internal order,suggesting that the inherent amphiphilicity of 1 plays a crucial role in improving its 2D self-assembly in aqueous phase.

关键词： self-assembly supramolecular organic frameworks two-dimensional amphiphilicity internal order

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浙南欠发达山区旅游产业发展实证研究

中国林业经济 2017年第1期 68-73页

作者：陈棕朱铨武明月浙江农林大学风景园林与建筑旅游与健康学院浙江临安311300 杭州师范大学生命与环境科学学院杭州310018

浙南山区属于浙江经济欠发达区域。交通不便,资源短缺是其发展短板,却使得该区域保留了独特的旅游资源。发展旅游产业,是其摆脱经济欠发达现状的重要途径。在分析欠发达山区旅游共性影响因素的前提下,以庆元县贤良镇旅游开发为案例,探... 详细信息

浙南山区属于浙江经济欠发达区域。交通不便,资源短缺是其发展短板,却使得该区域保留了独特的旅游资源。发展旅游产业,是其摆脱经济欠发达现状的重要途径。在分析欠发达山区旅游共性影响因素的前提下,以庆元县贤良镇旅游开发为案例,探讨浙南欠发达山区旅游产业发展途径。以期对庆元贤良镇旅游发展提供有益参考,并为浙江省欠发达山区旅游发展提供借鉴。

关键词：欠发达山区休闲旅游实证研究