An autonomous phase transition-complexation/decomplexation polymer system with a molecular recognition property
An autonomous phase transition-complexation/decomplexation polymer system with a molecular recognition property
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DOI：
10.1021/ma052509q
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发表时间：
2006-04-04
期刊：
影响因子：
5.5
通讯作者：
Yamaguchi, T
中科院分区：
文献类型：
--
作者：
Ohashi, H;Hiraoka, Y;Yamaguchi, T
我们描述了一种新的聚合物，表现出分子识别和驱动功能的协调本身。这种配位诱导自主聚合物收缩/溶胀相变，伴随着客体分子的络合/解络合。人工聚合物在分子识别的诱导下表现出自主行为，这是生物体特有的功能。我们使用β-环糊精（CD）作为分子识别部分，聚（N-异丙基丙烯酰胺）（NIPAM）作为聚合物中的致动部分。这两个组件相互影响：CD和它的客体分子8-苯胺基-萘磺酸铵盐（ANS）之间的络合诱导NIPAM链中的相变。同时，NIPAM链的相变影响MANS复合物的形成。这两种现象的协调诱导了具有CD/ANS络合/解络合的自主聚合物收缩/溶胀行为。我们成功地观察到这种行为，使用紫外可见光谱和荧光光谱。
We describe a novel polymer that exhibits a coordination of molecular recognition and actuation functionalities within itself. This coordination induces an autonomous polymer shrinking/swelling phase transition, accompanied by the complexation/decomplexation of a guest molecule. The artificial polymer exhibited autonomous behavior induced by molecular recognition, which is a unique function of the living body. We used beta-cyclodextrin (CD) as the molecular recognition moiety, and poly(N-isopropylacrylamide) (NIPAM) as the actuation moiety in the polymer. Both these components affect each other: complexation between CD and its guest molecule 8-anilino1-naphthalenesulfonic acid ammonium salt (ANS) induces a phase transition in the NIPAM chain. Meanwhile, the phase transition in the NIPAM chain affects MANS complex formation. Coordination of these two phenomena induces an autonomous polymer shrinking/swelling behavior with CD/ANS complexation/decomplexation. We successfully observed this behavior using UV-vis and fluorescence spectroscopy.