Abstract
AbstractA multiple stimuli‐responsive coordination polymer, namely, [Zn(H2O)6][Zn4Na2L4(H2O)12](H2O)12 (1) (H3L=5‐(4‐Sulfophenylazo) salicylic acid), was synthesized by a simple hydrothermal method. It reveals a 2D elastic layer‐structured framework, forming a three‐dimensional (3D) interlinked networks driven by extensive π…π stacking interactions. Removing water molecules by heating or vacuum freeze drying, it not only shows a reversible thermo‐chromism but also exhibits a selective gas absorption and breathing effect. In addition, this material exhibits skeleton stability under reversible dehydration/hydration. The reversible thermochromic behaviour is mainly attributed to the change of the coordination environment of Zn2+ ions during the dehydration/hydration process. Furthermore, the film of 1 on the polylactic acid (PLA) support displayed similar reversible thermochromic behaviour with high sensitivity (large color‐change and rapid response upon cooling or heating), promoting its application in switching fibres and devices, and naked‐eye colorimetric sensor in the future.
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