Structural diversity, magnetic properties, and luminescent sensing of four coordination polymers based on 6-(3,5-dicarboxylphenyl)nicotinic acid

Four coo;rdination polymers (CPs), namely, [Ni(HDNA)(bibp)(H2O)](n) (1), [Co(HDNA)(bibp)](n) (2), {[Co(FIDNA)(bibP)]center dot H2O}(n) (3) and {(Zn(HDNA)(bibp)]center dot H2O}(n) (4), have been synthesized from the mixedligand strategy of 6-(3,5-dicarboxylphenyl)nicotinic acid (H(3)DNA) and 4,4'-bis(benzimidazo-1-ly)benzene (bibp). Structural analyses revealed that four CPs all feature 2D sheets with diverse nets from {4(4).6(2)}-sql net (1), {Co-2(COO)(2)} SBUs based {4(4).6(2)}-sql net (2), to 4-connected {6(5).8} sheet (3 & 4). Besides, the temperature dependent magnetic susceptibilities of CPs 1-3 were investigated. And the luminescent sensing indicated CP 4 is a good bifunctional sensor for Fe3+ and Cr2O72- ions.