Premium
Molecular Spring‐like Triple‐Helix Coordination Polymers as Dual‐Stress and Thermally Responsive Crystalline Metal–Organic Materials
Author(s) -
Mei Lei,
An Shuwen,
Hu Kongqiu,
Wang Lin,
Yu Jipan,
Huang Zhiwei,
Kong Xianghe,
Xia Chuanqin,
Chai Zhifang,
Shi Weiqun
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202003808
Subject(s) - triple helix , stacking , materials science , polymer , conjugated system , helix (gastropod) , coordination polymer , crystal structure , metal , crystallography , nanotechnology , chemical physics , chemistry , stereochemistry , composite material , organic chemistry , ecology , snail , metallurgy , biology
Elastic metal–organic materials (MOMs) capable of multiple stimuli‐responsiveness based on dual‐stress and thermally responsive triple‐helix coordination polymers are presented. The strong metal‐coordination linkage and the flexibility of organic linkers in these MOMs, rather than the 4 Å stacking interactions observed in organic crystals, causes the helical chain to act like a molecular spring and thus accounts for their macroscopic elasticity. The thermosalient effect of elastic MOMs is reported for the first time. Crystal structure analyses at different temperatures reveal that this thermoresponsiveness is achieved by adaptive regulation of the triple‐helix chains by fine‐tuning the opening angle of flexible V‐shaped organic linkers and rotation of its lateral conjugated groups to resist possible expansion, thus demonstrating the vital role of adaptive reorganization of triple‐helix metal–organic chains as a molecular spring‐like motif in crystal jumping.