环状聚合物合成新路线:分子内受阻Lewis酸碱对催化下的高浓度合成  

The Synthesis of Cyclic Bio-based Acrylic Polymers by an Intramolecular Trifunctional Lewis Pair

作　　者：王献红[1] 宛新华[2] Xian-hong Wang;Xin-hua Wan(Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022;Beijing National Laboratory for Molecular Sciences,Key Laboratory of Polymer Chemistry and Physics of Ministry of Education,College of Chemistry and Molecular Engineering,Peking University,Beijing 100871)

机构地区：[1]中国科学院长春应用化学研究所,长春130022 [2]北京分子科学国家研究中心、高分子化学与物理教育部重点实验室、北京大学化学与分子工程学院,北京100871

出　　处：《高分子学报》2023年第4期409-412,共4页Acta Polymerica Sinica

摘　　要：与传统线形聚合物的合成不同,环状聚合物的合成通常需要特殊的催化剂设计且容易引入主体单体以外的其他化学结构.最近,吉林大学张越涛团队将两分子硼路易斯酸(LA)与一分子磷路易斯碱(LB)以共价键相连,合成出分子内受阻路易斯酸碱对B-P-B三官能催化剂,通过分子内和分子间的双重协同作用实现了1+1>>2的催化效果,进而成功以γ-甲基-α-亚甲基-γ-丁内酯(MMBL)为单体合成了完全由一种丙烯酸酯类单体构成的环状聚合物c-PMMBL.值得指出的是,与合成环状聚合物的传统策略不同,该催化剂可以在较高浓度下简单快速地合成环状聚合物,开创了环状聚合物宏量高效合成的新路线.Cyclic polymers exhibit unique properties in comparison with their linear analogs.However,it remains challenging to develop highly efficient and controllable strategy for synthesis of cyclic polymers.Recently,Prof.Zhang group from the State Key Laboratory of Supramolecular Structure and Materials at Jilin University,designs and synthesizes an intramolecularly,covalently tethered B-P-B trifunctional frustrated Lewis pair catalyst/initiator,composed of two acidic B sites and one basic P sites.Through both the intramolecularly-and intermolecularly synergistic effect,such B-P-B system exhibits“one plus one is greater than two”effect,thus successfully polymerizingγ-methyl-α-methylene-γ-butyrolactone(MMBL)into an authentic cyclic polymer c-PMMBL composed entirely of acrylate monomer units.Compared with traditional strategies,this method exhibits good generality and can be employed for rapid synthesis of cyclic polymers,suggesting its potential application in the scalable synthesis of cyclic polymers in the future.

关 键 词：环状聚合物 受阻路易斯酸碱对 三官能催化剂 分子内协同效应 分子间协同效应 

分 类 号：O631.5[理学—高分子化学]