Photopolymerization-Driven Macroscopic Mechanical Motions of a Composite Film Containing a Vinyl Coordination Polymer
Zhan-Yong Yang 1, 2 , Xiao Sang 1 , Dong Liu 3,* （刘东）, Qiu-Yi Li 1 , Feifan Lang 4,* , Brendan F Abrahams 5 , Hongwei Hou 4 ,*（侯红卫）, Pierre Braunstein 6 , Jian-Ping Lang 1, 2,*（郎建平）
1 College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, Jiangsu, P. R. China.
2 State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, P. R. China.
3 School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian, 223300, P. R. China.
4 College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China.
5 School of Chemistry, University of Melbourne, Victoria, 3010, Australia.
6 Université de Strasbourg - CNRS, Institut de Chimie (UMR 7177 CNRS), 4 rue Blaise Pascal-CS 90032, 67081, Strasbourg, France.
Angew. Chem.Int. Ed. 2023, e202302429 (1 of 7)
We report a unique vinyl coordination polymer (CP), [Zn(4-Fb)(2)(tkpvb)](n) (1, 4-HFb=4-fluorobenzoic acid, tkpvb=1,2,4,5-tetrakis(4-pyridylvinyl)benzene) that undergoes a rare photopolymerization reaction to form a two-dimensional CP integrated with a one-dimensional linear organic polymer. Upon light irradiation at different wavelengths, 1 exhibits an unprecedented phenomenon of photoinduced nonlinear lattice expansion. 1 can be uniformly dispersed in polyvinyl alcohol (PVA) to form the composite film of 1-PVA. When this film is exposed to UV light, internal minute stresses within crystallites are released by lattice expansion, resulting in a variety of photopolymerization-driven macroscopic mechanical motions. The findings provide new insights into the conversion of small lattice expansions of CPs into macroscopic mechanical motions based on photopolymerization reactions, which can promote the development of CPs-based smart photoactuators in the burgeoning field of microrobotics.
链接：//onlinelibrary.wiley.com/doi/full/10.1002/anie.202302429
