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Visualizing the Dynamics of Temperature‐ and Solvent‐Responsive Soft Crystals
Author(s) -
Pang Jiandong,
Liu Caiping,
Huang Yougui,
Wu Mingyan,
Jiang Feilong,
Yuan Daqiang,
Hu Falu,
Su Kongzhao,
Liu Guoliang,
Hong Maochun
Publication year - 2016
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201603030
Subject(s) - thermal expansion , anisotropy , crystallography , materials science , soft matter , negative thermal expansion , crystal structure , chemical physics , molecular dynamics , thermal , chemistry , thermodynamics , computational chemistry , composite material , physics , optics , colloid
We demonstrate that three flexible MOFs termed FJI‐H11‐R (FJI‐H=Hong's group in Fujian Institute of Research on the Structure of Matter, R=Me, Et, i Pr) can reversibly respond to temperature and solvents via structural transformations, which can be visualized by in situ single‐crystal X‐ray snapshot analyses. FJI‐H11‐R exhibit colossal anisotropic thermal expansion, with a record‐high uniaxial positive thermal‐expansion coefficient of 653.2×10 −6 K −1 observed in FJI‐H11‐Me. Additionally, large c ‐axial shrinkage of 32.4 % is also observed during desolvation. The stimuli‐responsive mechanism reveals the structural evolutions are related to the rotations and deformations of the organic linkers.