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

•Two zinc coordination polymers are constructed from a V-shaped bridging ligand.•Compound 1 shows an achiral 2D supramolecular network with helical chains.•Compound 2 exhibits an interesting achiral 2D network with helical chains.

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.

Graphical abstractTwo new coordination polymers [Zn(L)Cl2]n (1) with an achiral 2D supramolecular network constructed by left-handed single-helical chains and right-handed helical chains and [Zn4(L)4(ox)4]n·7nH2O (2) with an interesting achiral 2D network containing same numbers with left- and right-handed 21 helical chains were synthesized and characterized.Figure optionsDownload full-size imageDownload as PowerPoint slide