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Two Cadmium Coordination Polymers Based on Tris(p-carboxyphenyl) phosphane Oxide with Highly Selective Sensing of Nitrobenzene Derivatives and Hg2+ Cation

Abstract

Two coordination polymers (CPs), namely, [Cd1/2(L)1/3(bib)1/2(H2O)]n (1), and {[Cd2(HL)2(bibp)2]•3H2O}n (2), have been assembled from the tripodal ligand of tris(p-carboxyphenyl)phosphane oxide (H3L) with the help of 1,4-bis(imidazol-1-yl)benzene (bib) or 4,4'-bis(imidazol-1-yl)biphenyl (bibp). Structural analyses revealed that complex 1 is an unprecedented (3,4)-connected {103}2{106}3 net with the 2D [Cd3(L)2]n sheets arranged in ABCA′B′C′A′′B′′C′′ fashion. Complex 2 exhibits a 3-fold interpenetrated sheets with 4–connected {44•62}-sql sheet. Structural comparison reveals that the length of bis(imidazole) ancillary linkers plays a critical role in determining the structures and topologies. To our delight, fluorescence measurements show the two Cd(II) CPs can selectively and sensitively detect for Hg2+ cation and nitrobenzene derivatives (nitrobenzene, p-nitrotoluene, p-nitroaniline, and p-nitrophenol), which suggests that the two Cd(II) CPs are promising bifunctional luminescence sensor materials with sensing metal ions and small organic molecules.

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Publication details

The article was received on 03 Jul 2017, accepted on 04 Aug 2017 and first published on 04 Aug 2017


Article type: Paper
DOI: 10.1039/C7CE01227F
Citation: CrystEngComm, 2017, Accepted Manuscript
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    Two Cadmium Coordination Polymers Based on Tris(p-carboxyphenyl) phosphane Oxide with Highly Selective Sensing of Nitrobenzene Derivatives and Hg2+ Cation

    L. Huo, J. Zhang, L. Gao, X. Wang, F. Liming, K. Fang and T. Hu, CrystEngComm, 2017, Accepted Manuscript , DOI: 10.1039/C7CE01227F

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