Cadmium(II) and cobalt(II) coordination polymers constructed from 4,4′-di(1H-imidazol-4-yl)biphenyl and varied multicarboxylate ligands: Synthesis, structure and property

Five new coordination polymers [Cd2(H2L)(BPDA)2] (1), [Cd2(HL)(H2L)1.5(BHTC)]·H2O (2), [Cd2(H2L)2(BPTC)]·H2L (3), [Co2(HL)2(BPDA)] (4) and [Co2(H2L)2(BPTC)]·4H2O (5) have been isolated by reactions of corresponding metal salt with 4,4′-di(1H-imidazol-4-yl)biphenyl (H2L) and multicarboxylic acids of biphenyl-4,4′-dicarboxylic acid (H2BPDA), biphenyl-3,4′,5-tricarboxylic acid (H3BHTC) and biphenyl-3,3′,5,5′-tetracarboxylic acid (H4BPTC) and structurally characterized. 1 forms a 5-fold interpenetrating 3D dmp net by cross-linking of two different kinds of infinite zigzag chains of Cd-H2L and Cd-BPDA, 2 and 5 are 2D networks with different topologies, 3 is a 3D sqc11 net with Cd-BPTC layers pillared by H2L, while 4 exhibits a 3D InS net with Co-H2L 2D networks further connected by BPDA2− ligands. Thermal stability of the complexes, solid state luminescent property of 1–3 and sorption property of 5 have been investigated.

Graphical abstractFive new coordination polymers with 4,4′-di(1H-imidazol-4-yl)biphenyl and multicarboxylate ligands have been obtained and their thermal stability, luminescence and sorption property were investigated.Figure optionsDownload full-size imageDownload as PowerPoint slide