Self-oscillation of polymer chains induced by the Belousov-Zhabotinsky reaction under acid-free conditions
Self-oscillation of polymer chains induced by the Belousov-Zhabotinsky reaction under acid-free conditions
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DOI：
10.1021/jp0501704
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发表时间：
2005-05-19
影响因子：
3.3
通讯作者：
Yoshida, R
中科院分区：
文献类型：
--
作者：
Hara, Y;Yoshida, R
利用Belousov-Zhabotinsky（BZ）反应合成了一种新型自振荡聚合物。在这项研究中，磺酸基团作为一个新的pH值控制网站的N-异丙基丙烯酰胺的共聚物，钌配合物作为催化剂网站的介绍。通过引入pH值控制网站，我们成功地导致在无酸条件下，其中只有两个BZ基板，丙二酸和溴酸钠，作为添加剂存在的聚合物溶液的可溶性-不溶性自振荡。自振荡行为受温度和聚合物浓度的显著影响，反映了聚合物链在还原状态下的分子间聚集能力改变了低临界溶解温度。在无酸条件下实现聚合物链的自振荡可能导致它们在生物条件下作为新型仿生材料的实际用途。
A novel self-oscillating polymer was prepared by utilizing the Belousov-Zhabotinsky (BZ) reaction. In this study, a sulfonic acid group was newly introduced as a pH-control site into the copolymer of N-isopropylacrylamide, and the ruthenium complex was introduced as a catalyst site. By introducing the pH-control site, we succeed in causing the soluble-insoluble self-oscillation of the polymer solution under acid-free conditions in which only two BZ substrates, malonic acid and sodium bromate, were present as added agents. The self-oscillating behavior was remarkably influenced by the temperature and polymer concentration, which reflects the intermolecular aggregative capacity of the polymer chains in the reduced state to change the lower critical solution temperature. This achievement of self-oscillation of polymer chains under acid-free conditions may lead to their practical use as novel biomimetic materials under biological conditions.