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Five new Coordination Polymers with a Y-shaped N-heterocyclic carboxylic acid: Structural Diversity, Bifunctional Luminescence Sensing and Magnetic Properties

Abstract

Employing Y-shaped N-heterocyclic carboxylic acid 4,4’-(1H-1,2,4-triazol-1-yl)methylene-bis(benzonic acid) (H2TZMB) and pyridine ancillary linkers (4,4’-bipy = 4,4’-bipyridine, 1,4-bipb = 1,4-bis(pyrid-4-yl)benzene and 4,4’-bipb = 4,4’-bis(pyrid-4-yl)biphenyl), five new coordination polymers (CPs), namely, {[Cd(TZMB)(DMA)]•(H2O)0.5}n (1), {[Cd(HTZMB)2(4,4’-bipb)]•(4,4’-bipb)(H2O)0.5}n (2), {[Ni(TZMB)(1,4-bipb)(H2O)]•H2O}n (3) ,{[Ni(TZMB)(4,4’-bipy)(H2O)1.5]•(H2O)3.5}n (4) and {[Mn2(TZMB)2(H2O)(DMA)]•DMA}n (5), have been obtained and characterized. Structural analyses reveal that 1 is a 2D (3,6)-connected {43}2{46.66.83} net based on the binuclear {Cd2(COO)4} SBUs. The 2D structure of 2 exhibits a uninodal 4-connected with the point symbol of {44.62}. 3 shows a 3D (3,5)-connected net with the point symbol of {4.6.8}{4.64.85}. 4 presents a 3D (4,6)-connected net based on the binuclear {Ni2(COO)2(μ2-H2O)} SBUs with the point symbol of {3.4.53.6}{32.42.55.65.7}. 5 indicates a 3D 3-nodal (3,4,7)-connected net with 1D rod-like {Mn2(COO)4}n SBUs with the point symbol of {42.6}{44.62}{46.69.86}. Luminescence properties of 1 and 2 demonstrate that they have potential applications in luminescence sensing for NACs and Fe3+ ions, and then luminescence quenching mechanisms were systematically investigated. Furthermore, magnetic measurements of 3-5 indicate that there exist ferromagnetic interaction between adjacent Ni(II) ions in 3 and 4, antiferromagnetic interaction between adjacent Mn(II) ions in 5.

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Publication details

The article was received on 26 Jun 2019, accepted on 09 Aug 2019 and first published on 09 Aug 2019


Article type: Paper
DOI: 10.1039/C9CE00988D
CrystEngComm, 2019, Accepted Manuscript

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    Five new Coordination Polymers with a Y-shaped N-heterocyclic carboxylic acid: Structural Diversity, Bifunctional Luminescence Sensing and Magnetic Properties

    J. Liang, J. Zhang, J. Liang, L. Zhai, H. Wu, X. Niu and T. Hu, CrystEngComm, 2019, Accepted Manuscript , DOI: 10.1039/C9CE00988D

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