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Title: A supramolecular microporous network of zinc(II) coordination polymer for highly selective fluorescent detection of Pb2+
Authors: Xin, Ling-Yun
Li, Yun-Ping
Ju, Feng-Yang
Li, Xiao-Ling
Liu, Guang-Zhen
Keywords: Coordination polymers;Dual ligand systems;Microporous networks;Fluorescence;Sensing materials;Zinc;Lead
Issue Date: Aug-2017
Publisher: NISCAIR-CSIR, India
Abstract: A hydrogen bonded microporous network with Lewis basic N sites, viz., {[Zn(TZ-HIP)(HPYTZ)(H2O)2]·3H2O}n [TZ-HIP = 5-(tetrazol-5-yl)isophthalic acid, HPYTZ = 3,5-di(4-pyridyl)-1H-1,2,4- triazolate ligand] has been obtained from the dual ligand system of polydentate N-heterocyclic carboxylate and dipyridyl-type ligands. Single crystal X-ray diffraction analysis shows that the adjacent Zn(II) centers are bridged by HTZ-H2IP ligand to form 1D chain with HPYTZ molecules as free lateral arms. The paralleled chains are connected by H-bonding interactions to produce the 3D microporous network with 1D pores. It is interesting that the uncoordinated N atoms (Lewis base sites) pores cause Pb2+ ions to produce a remarkably enhancing effect on the luminescent intensity of the zinc complex with high sensitivity in the detection range of 10-3-10-5mol L-1 concentration limit. This coordination polymer may be used as a sensing material for developing a highly selective and sensitive Pb2+ sensor in the biological and environmental materials.
Page(s): 826-831
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.56A(08) [August 2017]

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