Syntheses, structures and luminescent properties of two new zinc coordination polymers based on 4′-(4-aminephenyl)-4,2′:6′,4″-terpyridine

Abstract

Two new coordination polymers, namely, [Zn(L)Cl2]n (1) and [Zn4(L)4(ox)4]n·7nH2O (2) (L=4′-(4-aminephenyl)-4,2′:6′,4″-terpyridine, H2ox=oxalic acid), have been synthesized under hydrothermal condition and characterized by elemental analysis, IR, and single crystal X-ray diffraction. Compound 1 exhibits an achiral 2D supramolecular network constructed by left-handed single-helical chains and right-handed H-bonding helical chains, which further generated to a 2D+2D→2D parallel interpenetration framework. Compound 2 displays an achiral 2D layer based on a 1D left- and right-handed helical chains with alternate arrangement, which is further extended into a 2D+2D→3D supramolecular network by hydrogen bonds. Additionally, their photoluminescence properties have been investigated.