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A fluorescent Cd(II) based 2-D coordination polymer for highly selective detection of nitroaromatics and Hg2+

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A 2-D Cd(II) coordination polymer (CP), {[Cd2(L)2(4,4′-bipy)2(H2O)7H2O]n (1), has been synthesized using 5-aminoisophthalic acid (H2L) as ligand and 4,4′-bipyridine as co-ligand. A single-crystal X-ray diffraction study shows that 1 is an infinite 2-D layer. CP 1 behaves as a highly selective and sensitive fluorescence chemosensor for detection of Hg2+ and 2,4,6-trinitrotoluene (TNT). Furthermore, possible emission quenching in 1 in the presence of nitroaromatics has been addressed with the aid of theoretical calculations. The calculations indicated that there are both electron and energy transfer processes, in addition to electrostatic interaction between 1 and nitroaromatics which contributes to the selective fluorescence quenching.
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Keywords: Nitroaromatics; chemosensor; theoretical calculation

Document Type: Research Article

Affiliations: 1: School of Chemistry and Environmental Engineering, Institute of Functional Materials, Sichuan University of Science & Engineering, Zigong, PR China 2: Dongguan Key Laboratory of Drug Design and Formulation Technology, Key Laboratory for Research and Development of New Medical Materials of Guangdong Medical University and School of Pharmacy, Guangdong Medical University, Dongguan, PR China 3: Department of Chemistry, Faculty of Science, University of Lucknow, Lucknow, India

Publication date: May 3, 2018

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