Fluorescence Properties and Crystal Structures of Metal-organic Coordination Complexes Based on the 2,6-Naphthalenedicarboxylic Acid

摘要

Two metal-organic coordination complexes,[Zn(2,6-ndc)(l,2-bix)]n (1) and [Zn(2,6-ndc)(1,3-bix)]n (2) (2,6-H2ndc =2,6-naphthalenedicarboxylic acid,1,2-bix =1,2-bis(imidazole-1-ylmethyl)-benzene and 1,3-bix =1,3-bis(imidazole-1-ylmethyl)-benzene) have been synthesized by the hydrothermal method.Though the two complexes both crystallize in a triclinic system,space group P ī and show similar two-dimensional structures,weak intermolecular interactions (π-πpacking interactions) only exist in complex 2.They are characterized by single-crystal X-ray diffraction analysis,fluorescence measurement,IR spectroscopy and TGA.Moreover,the solid-state fluorescence spectra of two complexes show maximal emission peaks at 365 (λex =329 nm) and 367 nm (λex =344 nm),respectively.