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Zinc-based CPs for effectively detection of Fe3+ and Cr2O72- ions

Abstract

Four new Zinc-based coordination polymers (CPs), namely, {[Zn(EtOip)(bpp)]·0.5bpp·4H2O}n (1), [Zn(PrOip)(bpp)(H2O)]n (2), {[Zn(nBuOip)(bpp)]·2H2O}n (3), and {[Zn(iBuOip)(bpp)]·2H2O}n (4) (where EtOip = 5-ethoxyisophthalate, PrOip = 5-n-propoxyisophthalate, nBuOip = 5-n-butoxyisophthalate, iBuOip = 5-i-butoxyisophthalate, bpp = 1,3-bis(4-pyridyl)propane) were synthesized from the 5-substituted isophthalate ligands using the 1,3-bis(4-pyridyl)propane (bpp) ligand. Topology analysis indicated that compound 1 showed 3D lvt topology, whereas compound 2 had two-fold interpenetrated 3D diamond network. Complexes 3 and 4 exhibited 2D sql/Shubnikov tetragonal plane networks. The distinction of coordination polymers were caused by the 5-substituted groups of isophathlate and the conformation of bpp. Moreover, compounds 2–4 are bifunctional luminescent materials that can detect environmentally relevant Fe3+ and Cr2O72- ions using the luminescence quenching method. The detection limits of CPs 2–4 for Fe3+ were 6.676 × 10−5 M, 5.442× 10-5 M, 1.773× 10-5 M, respectively, whereas the detection limits of CPs 2–4 for Cr2O72- were 0.1314 × 10−5 M, 1.778× 10−5 M, 1.676× 10−5 M, respectively. The possible mechanisms for fluorescence quenching phenomena toward Fe3+ and Cr2O72− ions have been also investigated in detail.

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Publication details

The article was received on 30 Oct 2018, accepted on 05 Dec 2018 and first published on 06 Dec 2018


Article type: Paper
DOI: 10.1039/C8NJ05508D
Citation: New J. Chem., 2018, Accepted Manuscript
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    Zinc-based CPs for effectively detection of Fe3+ and Cr2O72- ions

    R. Zhu, T. Wang, D. Wang, T. Yan, Q. Wang, H. Li, Z. Xue, J. Zhou, L. Du and Q. Zhao, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8NJ05508D

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