title: Two-dimensional supramolecular spring: coordination driven reversible extension and contraction of bridged half rings.
abstract: A tetraethylene glycol ether bridged derivative 9 has been designed and synthesized, and its two-dimensional (2D) self-assembled behavior has been investigated at the single-molecule level. Our results revealed that 9 generally adopted the fully extended state but changed to the contracted state when triggered by K2CO3, and recovered the original fully extended conformation after subsequent addition of 18-crown-6. Such a coordination-controlled reversible assembly reveals supramolecular springs in response to chemical stimuli, which is of great interest in bionics and materials science.
authors.affiliation: Key laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou 310012, China. shulj@hznu.edu.cn.
authors.forename: Dapeng
authors.initials: D
authors.lastname: Luo
authors.forename: Xuemei
authors.initials: X
authors.lastname: Zhang
authors.forename: Yongtao
authors.initials: Y
authors.lastname: Shen
authors.forename: Jing
authors.initials: J
authors.lastname: Xu
authors.forename: Lijin
authors.initials: L
authors.lastname: Shu
authors.forename: Qingdao
authors.initials: Q
authors.lastname: Zeng
authors.forename: Chen
authors.initials: C
authors.lastname: Wang