Hierarchical supramolecular assembly based on metal coordination of asymmetric ligand pairs and host-guest recognition

Hui Li, Yan Dong, Ri Qiang Li, Yan Zhang, Shengyong Liu, Wei Tian

科研成果: 期刊稿件文章同行评审

摘要

Three distinct monomers were synthesized, namely CD2, E2, and F2. Monomer CD2 is composed of a crown ether group (B21C7) and two terpyridine (tpy) groups, monomer E2 contains two 6,6′′-di(2,6-dimethoxylphenyl)-substituted terpyridine (tmy) groups, and the homoditopic F2 comprises two ammonium salts (DAS). By combining monomer CD2 with Zn(OTf)2, a supramolecular linear polymer (SLP1) was successfully obtained through metal coordination based on terpyridyl units. Upon introducing monomer E2 into the solution containing SLP1, a novel supramolecular linear polymer (SLP2) was formed in the solution via complementary metal coordination. Furthermore, by adding another monomer F2 to the solution of SLP2, we observed a further structural transformation of SLP2 into a supramolecular crosslinked polymer (SCP3). This transformation was facilitated by double noncovalent interactions involving both complementary metal coordination and host-guest recognition. Notably, all resulting supramolecular polymers, SLP1, SLP2, and SCP3, exhibited remarkable sensitivity towards OH along with noticeable changes in their fluorescence emission properties. Moreover, at high concentrations, SCP3 demonstrated the ability to form a supramolecular gel while also exhibiting excellent self-healing properties.

源语言英语
页(从-至)248-255
页数8
期刊Organic Chemistry Frontiers
12
1
DOI
出版状态已出版 - 15 11月 2024
已对外发布

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