Visual recognition of supramolecular graft polymer formation via phenolphthalein-cyclodextrin association
Visual recognition of supramolecular graft polymer formation via phenolphthalein-cyclodextrin association
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DOI：
10.1016/j.polymer.2013.07.031
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发表时间：
2013-08-23
期刊：
影响因子：
4.6
通讯作者：
Ritter, Helmut
中科院分区：
文献类型：
--
作者：
Hetzer, Martin;Fleischmann, Carolin;Ritter, Helmut
介绍了由主客体组装驱动的超分子接枝聚合物在水溶液中形成的视觉识别。β-环糊精(β-CD)与酚酞之间的相互作用可以通过光学检测在基本介质中发生明显的颜色变化来跟踪。通过N，N-二甲基丙烯酰胺与N-(2-hydroxy-5-(1-(4-hydroxyphenyl)-3-oxo-1，3-dihydroisobenzofuran-1-yl)benzyl)acrylamide.的可逆加成-断裂链转移(RAFT)共聚反应，合成了含酚酞的侧链聚合物RAFT聚合得到了分子质量在6900-8800g摩尔(-1)之间，摩尔质量分散度(D)在1.1-1.2之间的统计共聚物。合成了N，N-二乙基丙烯酰胺的丙叉链转移剂，然后铜(I)催化与β-CD-叠氮化物的环加成反应(M-n=8200gmol(-1)；D=1.2)。用2D NOESY核磁共振、UV-Vis光谱和动态光散射表征了两种聚合物的自组装形成超分子接枝聚合物。(C)2013爱思唯尔有限公司。保留所有权利。
Visual recognition of the formation of supramolecular graft polymers in aqueous solution driven by host-guest assembly is presented. The interaction between beta-cyclodextrin (beta-CD) and phenolphthalein moieties can be followed via a distinctive change of color in basic media by optical inspection. The phenolphthalein-containing lateral polymer chain was obtained via reversible addition-fragmentation chain transfer (RAFT) copolymerization of N,N-dimethylacrylamide and N-(2-hydroxy-5-(1-(4-hydroxyphenyl)-3-oxo-1,3-dihydroisobenzofuran-1-yl)benzyl)acrylamide. The RAFT polymerizations afforded statistical copolymers with molecular masses between 6900 and 8800 g mol(-1) and molar mass dispersities (D) between 1.1 and 1.2. beta-CD-functionalized building blocks were synthesized using a propargyl-functionalized chain transfer agent for the polymerization of N,N-diethylacrylamide followed by a copper(I)-catalyzed cycloaddition with beta-CD-azide (M-n = 8200 g mol(-1); D = 1.2). Self-assembly of both polymer's to form supramolecular graft polymers was evidenced by 2D NOESY NMR, UV-vis spectroscopy and dynamic light scattering. (C) 2013 Elsevier Ltd. All rights reserved.