文献类型：期刊文献

英文题名：Dual-responsive polypseudorotaxanes based on block-selected inclusion between polyethylene-block-poly(ethylene glycol) diblock copolymers and 1,4-diethoxypillar[5]arene

作者：Chen, Jianzhuang[1];Li, Nan[1];Gao, Yongping[1];Sun, Fugen[1];He, Jianping[1];Li, Yongsheng[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Lab Low Dimens Mat Chem, Shanghai 200237, Peoples R China

年份：2015

卷号：11

期号：39

起止页码：7835

外文期刊名：SOFT MATTER

收录：;EI(收录号：20154101351527);WOS:【SCI-EXPANDED(收录号:WOS:000363205100017)】；

基金：This work was financially supported by the National Natural Science Foundation of China (grant no. 21404039 and 51172070), the China Postdoctoral Science Foundation (grant no. 2014M560304 and 2015T80406), and the Fundamental Research Funds for the Central Universities (grant no. WD1414042). The authors are grateful to Dr Xuzhou Yan, Xiaodong Chi, Peifa Wei, and Xiaofan Ji from Zhejiang University and Dr Chengyou Han from China University of Petroleum (East China) for their great help and useful discussions in this work.

语种：英文

外文关键词：Polyethylene glycols - Polyols - Polyethylenes - Polyethylene oxides - Chlorine compounds - Ethylene glycol

摘要：Based on the selective recognition of the polyethylene (PE) block of polyethylene-block-poly(ethylene glycol) (PE-b-PEG) by 1,4-diethoxypillar[5]arene (DEP5A), two novel thermo and competitive guest (1,4-dibromobutane or hexanedinitrile) responsive polypseudorotaxanes (PPRs) have been successfully constructed. The formation of PPRs both in solution and in the solid state was demonstrated by H-1 NMR, 2D NOESY, and WAXD analyses. TGA data illustrate that PPRs exhibit higher thermal stability than their precursor diblock copolymers. Moreover, intriguing porous disk-like aggregates are produced by electrospraying of PPRs in CHCl3 and the self-assembled structures of PPRs are totally changed by the addition of 1,4-dibromobutane or hexanedinitrile, demonstrating their competitive guest stimuli-responsiveness.