Two Calcium Coordination Polymers with Multi‐Stimuli‐Responsive Properties

Abstract

AbstractTwo skeleton isomers, [CaL(H2O)(DMF)2]•DMF (1) (H2L=5‐(1,3‐dioxo‐1H‐benzo[de]isoquinolin‐2(3H)‐yl)isophthalic acid) with a 1 dimensional chain structure and [CaL(DMF)1.72]• (DMF)0.28 (2) with a 2 dimensional layer structure were synthesized. Mechanochromic luminescence studies reveal that 1 and 2 exhibit luminescent red‐shift and blue‐shift respectively under grinding stimuli. The different influence of grinding stimuli on the π⋅⋅⋅π interaction in the two structures are proposed to be the main reason for such different responses. In addition, 1 has a rare broad sensing ability for halogenated hydrocarbons and can distinguish seven halogenated hydrocarbons out of 17 solvents. 1 can also be used for rapid detection of trace water in DMF with a calculated detection limit of 0.0078 v/v %. The relevant recognition mechanism is the decomposition of the structure during the recognition process due to the water instability of the ionic bond. The above results reveal that both compounds have the potential to be used as multi‐stimulus‐responsive materials.