Blue luminescent zinc(II) complexes of 2,6-bis[1-(2,6-diisopropylphenylimino)ethyl]pyridine and 2,6-bis[l-(2,6-dimethylphenylimmo)ethyl]pyridine

摘要

Two new Zn(H) complexes of, 2,6-bis[l-(2,6-diisopropylphenylimino)ethyl]pyridine (L~1), 2,6-bis[l-(2,6-dimethylphenylimino) ethyl]pyridine (L~2) were synthesized. These two complexes have the formulas Zn(L~1)Cl_2 (1) and Zn(L~2)Cl_2-CH_3CN (2), respectively. Crystal structures of complexes 1 and 2 were determined by single-crystal X-ray diffraction. Crystallographic studies on 1 and 2 reveal both complexes to be five-coordinate with geometries that can be best described as distorted trigonal bipyramidal. Complexes 1 and 2 have blue luminescence at room temperature in solution and the solid state. The blue luminescence of the complexes is due to pin* - > pin TT transition centered on the ligands. The Zn(II) centers play a key role in enhancing fluorescent emission of the ligands.