A Zn-Based Fluorescent Coordination Polymer as Bifunctional Sensor: Sensitive and Selective Aqueous-Phase Detection of P
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A Zn‑Based Fluorescent Coordination Polymer as Bifunctional Sensor: Sensitive and Selective Aqueous‑Phase Detection of Picric Acid and Heavy Metal Ion Mo Ashafaq1 · Mohd Khalid1 · Mukul Raizada1 · M. Shahwaz Ahmad1 · M. Shahnawaz Khan1 · M. Shahid1 · Musheer Ahmad2 Received: 19 March 2020 / Accepted: 5 May 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract In contrast to the traditionally exploited cages, organic chromophores and metal organic frameworks (MOFs) as a sensing model, the chemistry of 1D coordination polymers as promising sensors is still under explored and needs special attention. Herein, a zinc 1D coordination polymer, {[Zn(HPydc)2]·2H2O}n (1) has been synthesized using 2,3-Pyridinedicarboxylic acid (H2Pydc) and characterized employing FT-IR, single crystal X-ray, PXRD, TG, CV, spectral studies, time resolved fluorescence and Hirshfeld surface analysis. The 1 displayed intermolecular O⋯H, Cl⋯H and others interactions, which create a supramolecular network. These interactions have been substantiated by Hirshfeld surface analyses. 1 exhibit promising dual functional sensing behaviour for recognition of picric acid (PA) and P d2+ ions over other nitroaromatic compounds (NACs) and metal ions via fluorescence quenching with high selectivity and sensitivity in the aqueous phase. The unique properties of 1 as a potential bi-functional chemosensor for the detection of both PA and Pd2+ in the aqueous medium has been estabilished as confirmed by its high quenching efficiency, selectivity and superior detection limit. The sensing mechanism is explored by spectral titrations, time decay and also by the DFT (B3LYP/def2-SVP) studies. The present investigation adds to the advancement of MOF or CP materials research, particularly in their application as biological and environmental fluorescent chemosensors. Keywords Coordination polymer · Palladium · Organic explosives · Selective detection
1 Introduction With consistently rising challenge for public health and water quality, there is currently a considerably more prominent interest for the detection and removal of contaminations from wastewater. Palladium as a rare transition metal has a wide range of applications, for example, in the fuel cells, materials, electrical and electronic industries, jewellery, and Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10904-020-01579-6) contains supplementary material, which is available to authorized users. * Mohd Khalid [email protected] 1
Department of Chemistry, Aligarh Muslim University, Aligarh 202002, India
Department of Applied Chemistry, Aligarh Muslim University, Aligarh 202002, India
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heterogeneous catalysis. The very low concentration of Pd2+ ion can make critical health issues, like cytotoxic impacts, and hypersensitivities [1, 2]. Moreover, the interaction of the palladium ion with biomolecules i.e. proteins, DNA and RNA, which can regulate the various cellular activities can cause severe consequences [2, 3]. W
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