文献类型：期刊文献

英文题名：Molecularly Imprinted Sites Translate into Macroscopic Shape-Memory Properties of Hydrogels

作者：Li, Ziyuan[2,3];Wulf, Verena[1];Wang, Chen[1];Vazquez-Gonzalez, Margarita[1];Fadeev, Michael[1];Zhang, Junji[2,3];Tian, He[2,3];Willner, Itamar[1]

机构：[1]Hebrew Univ Jerusalem, Inst Chem, IL-91904 Jerusalem, Israel;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Feringa Nobel Prize Scientist Joint Res Ctr, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Sch Chem & Mol Engn, Feringa Nobel Prize Scientist Joint Res Ctr, Joint Int Res Lab Precis Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2019

卷号：11

期号：37

起止页码：34282

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20193907479354);WOS:【SCI-EXPANDED(收录号:WOS:000487179900082)】；

基金：The authors acknowledge financial support from the NSFC (21420102004 and 21878086), the Israel Science Foundation, the Shanghai Rising-Star Program (19QA1402500), Shanghai Municipal Science and Technology Major Project (2018SHZDZX03), and the International Cooperation Program of Shanghai Science and Technology Committee (17520750100).

语种：英文

外文关键词：sensors; rheometry; stiffness switch; donor-acceptor; host-guest chemistry

摘要：The polymerization of acrylamide, dopamine methacrylamide, and bis-acrylamide in the presence of one of the electron acceptors, N,N'-dimethyl-4,4'-bipyridinium, (1), N,N'-dimethylbipyridinium-4,4'-ethylene, (2), or bipyridinium dithienylethene, (3), yields hydrogel matrices of high stiffness that are cooperatively cross-linked by bis-acrylamide and electron donor (dopamine)-acceptor complexes. Washing off the diffusional electron acceptor units yields molecularly imprinted matrices of lower stiffness, stabilized only by the bis-acrylamide bridges that include specific binding sites for the selective association of the electron acceptor (1), (2), or (3). These imprinted hydrogel matrices show selective recovery of the stiff properties upon binding the respective electron acceptor units to the imprinted sites. The control over the stiffness properties enables the development of shape-memory, molecularly imprinted hydrogels and stiffness-based sensors. The results show how molecularly imprinted sites translate into macroscopic shape-memory properties of hydrogels.