Study on the synthesis and host–guest luminescence properties of a novel Cd(ii)-picolinate coordination polymer

Abstract

A coordination polymer with guest-molecule-based luminescence is flexible in preparation and shows greater controllability. A one-dimensional chain coordination polymer CdL has been synthesized by in situ hydrolysis of 2,6-pyridinedicarboxylic acid monomethyl ester and cadmium nitrate. Although the coordination polymer does not exhibit a three-dimensional structure, each chain piles up to form penetrating diamond channels. Based on the functionalities and size effect of the crystal channels, fluorescein, rhodamine 6G and Ru(bpy)₃Cl₂ can be dispersed into the channels through encapsulation experiments of a series of luminescent molecules and complexes. It shows good dual-emitting performance and proves that we have successfully introduced guest molecules to regulate the luminescence performance of CdL.