Optically Active Amphiphilic Polymer Brushes Based on Helical Polyacetylenes: Preparation and Self-Assembly into Core/Shell Particles
Optically Active Amphiphilic Polymer Brushes Based on Helical Polyacetylenes: Preparation and Self-Assembly into Core/Shell Particles
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基于螺旋聚乙炔的光学活性两亲性聚合物刷：制备和自组装成核/壳颗粒
DOI：
10.1021/ma102702a
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发表时间：
2011-01
期刊：
影响因子：
5.5
通讯作者：
Yang Wantai
中科院分区：
文献类型：
--
作者：
Ding Lei;Huang Yingying;Zhang Yuanyuan;Deng Jianping;Yang Wantai
报道了一类独特的两亲性聚合物刷的首次制备和自组装，该聚合物刷由疏水性光学活性螺旋聚乙炔主链和亲水性热敏性聚（N，N-二甲基氨基-2-乙基甲基丙烯酸酯）（PDMAEMA）侧链组成。聚合物刷的制备通过两步过程：取代的乙炔单体进行催化共聚，形成侧链中带有-Br部分的光学活性螺旋聚合物主链，其被用作随后的乙烯基单体DMAEMA的原子转移自由基聚合（ATRP）的大分子引发剂。高的比旋光度和强烈的圆二色性表明，聚合物刷具有光学活性，来自螺旋聚乙炔主链。该聚合物刷在水/四氢呋喃混合溶剂中自组装形成核/壳结构的纳米粒子，表现出相当大的光学活性，其来源于螺旋状的聚乙酰基。
The article reports on the first preparation and self-assembly of a unique class of amphiphilic polymer brushes, which consist of hydrophobic optically active helical polyacetylene backbones and hydrophilic thermosensitive poly(N,N-dimethylamino-2-ethyl methacrylate) (PDMAEMA) side chains. The polymer brushes were prepared by a two-step process: substituted acetylene monomers underwent catalytic copolymerizations to form optically active helical polymer backbones bearing −Br moieties in side chains, which were employed as macroinitiators for the subsequent atom transfer radical polymerization (ATRP) of a vinyl monomer DMAEMA. High specific rotations and intense circular dichroism effects demonstrated that the polymer brushes possessed optical activities, derived from the helical polyacetylene backbones. The polymer brushes could self-assemble in water/tetrahydrofuran mixture solvent to form core/shell structured nanoparticles, which showed considerable optical activity originated in the helical polyacetyl...