Designing unusual polymer topologies by electrostatic self-assembly and covalent fixation
Designing unusual polymer topologies by electrostatic self-assembly and covalent fixation
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DOI：
10.1021/ja001736z
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发表时间：
2000-10-11
影响因子：
15
通讯作者：
Tezuka, Y
中科院分区：
文献类型：
--
作者：
Oike, H;Imaizumi, H;Tezuka, Y
一种新的协议，用于设计各种拓扑独特的多环聚合物架构，如单，双，和三环聚合物以及拓扑异构体，已提出的基础上的静电自组装的聚合物前体具有五元环铵盐基团伴随多官能羧酸抗衡阴离子。在有机介质中以低于1克/升的浓度稀释后，聚合物前体的多个聚集体完全解离成最小的组装体，并且阳离子和阴离子平衡电荷。随后通过羧酸根抗衡阴离子的环状铵盐基团的开环反应的共价固定为包含单环和多环聚合物单元的各种聚合物结构提供了有效的手段。
A novel protocol for designing a variety of topologically unique multicyclic polymer architectures, such as mono-, bi-, and tricyclic polymers as well as topological isomers; has been proposed on the basis of an electrostatic self-assembly of polymer precursors having five-membered cyclic ammonium salt groups accompanying plurifunctional carboxylate counteranions. Upon dilution in an organic medium at a concentration of below a gram per liter, the multiple aggregates of the polymer precursors completely dissociate into a smallest assembly, and cations and anions balance the charge. The subsequent covalent fixation through the ring-opening reaction of cyclic ammonium salt groups by carboxylate counteranions provides an efficient means for a variety of polymer architectures comprising mono- and multicyclic polymer units.