具有电化学敏感性的超分子交联点及其水凝胶研究  

Electrochemically sensitive supra-crosslink and its corresponding hydrogel

作　　者：杜萍 陈国颂[1] 江明[1] 

机构地区：[1]聚合物分子工程国家重点实验室,复旦大学高分子科学系,上海200433

出　　处：《中国科学：化学》2012年第5期723-731,共9页SCIENTIA SINICA Chimica

基　　金：国家自然科学基金(20834004;20904005);国家重点研究基础发展计划(973计划)(2009CB930402;2011CB932503)的资助

摘　　要：本文通过主体分子环糊精(CD)和客体分子二茂铁(Fc)之间的包结络合作用,在CD稳定的CdS量子点(CD@QD)表面成功地引入了可聚合双键.所得超分子结构能够作为交联点与N,N-二甲基丙烯酰胺(DMA)单体共聚制备杂化超分子水凝胶(Fc-Gel),称为超分子交联点(Fc-SCL).Fc还赋予了该结构良好的电化学敏感性.随着Fc-SCL含量的增加,Fc-Gel的力学性能有所增强.此外,该凝胶还具有良好的荧光性质.实验表明,在凝胶形成过程中,CD和Fc之间的包结络合起了关键的交联作用,因此这种凝胶是一种由超分子作用诱导的有机-无机杂化水凝胶.In recent years, host-guest chemistry, as an important part of supramolecular chemistry, has been introduced and employed in the research frontier of material science. In this paper, through inclusion complexation between cyclodextrin （CD） host and ferrocene （Fc） guest, a monomer with double bond was incorporated to the surface of CdS quantum dot （QD）. The obtained supra-structure could act as a supra-crosslink （Fc-SCL） in its copolymerizing with N,N-dimethylacrylamide （DMA） leading to a hybrid supramolecular hydrogel （Fc-Gel）. Fc-SCL inherited satisfactory electrochemical activity from Fc. When the weight percentage of Fc-SCL in Fc-Gel was increased, an apparent increase of elastic modulus （G＇） was observed. Furthermore, Fc-Gel also exhibited good fluorescent properties. It was also demonstrated that the inclusion complexation of CD and Fc played a crucial role in constructing the hydrogel; therefore, this Fc-Gel was an organic-inorganic hybrid hydrogel induced by supramolecular interaction.

关 键 词：超分子水凝胶 电化学敏感性 超分子交联点 包结络合 环糊精 

分 类 号：O648.17[理学—物理化学]