An AIE material with time-dependent luminescence conversion obtained by 2D coordination polymer modification via covalent post-synthetic modification

Abstract

In this study, we reported the covalent post-synthetic modification (PSM) of a luminescent complex to achieve aggregation-induced emission (AIE), prepared using the Schiff base reaction of TPE–CHO and HLC–NH₂, denoted by HLC–NH₂–TPE. HLC–NH₂ formed a 2D luminescent complex which was constructed using 4,4′-diamino-[1,1′-biphenyl]-2,2′-dicarboxylic acid and zinc ions via a solvothermal reaction. HLC–NH₂–TPE inherited the luminescence properties of HLC–NH₂ and exhibited noticeable AIE properties in response to environmental viscosities and temperature changes. Interestingly, HLC–NH₂–TPE displayed a time-dependent luminescence conversion phenomenon in a mixed solution of DMF/H₂O (v : v/1 : 9).