Benzophenone based fluorophore for selective detection of Sn2+ ion: Experimental and theoretical study

Amol G Jadhav; Suvidha S Shinde; Sandip K Lanke; Nagaiyan Sekar

doi:10.1016/j.saa.2016.11.051

Benzophenone based fluorophore for selective detection of Sn²⁺ ion: Experimental and theoretical study

Spectrochim Acta A Mol Biomol Spectrosc. 2017 Mar 5:174:291-296. doi: 10.1016/j.saa.2016.11.051. Epub 2016 Dec 5.

Authors

Amol G Jadhav¹, Suvidha S Shinde¹, Sandip K Lanke¹, Nagaiyan Sekar²

Affiliations

¹ Department of Intermediate and Dyestuff Technology, Institute of Chemical Technology (Formerly UDCT), N. P. Marg, Matunga, Mumbai 400 019, Maharashtra, India.
² Department of Intermediate and Dyestuff Technology, Institute of Chemical Technology (Formerly UDCT), N. P. Marg, Matunga, Mumbai 400 019, Maharashtra, India. Electronic address: n.sekar@ictmumbai.edu.in.

PMID: 27984751
DOI: 10.1016/j.saa.2016.11.051

Abstract

Synthesis of novel benzophenone-based chemosensor is presented for the selective sensing of Sn²⁺ ion. Screening of competitive metal ions was performed by competitive experiments. The specific cation recognition ability of chemosensor towards Sn²⁺ was investigated by experimental (UV-visible, fluorescence spectroscopy, ¹H NMR, ¹³C NMR, FTIR and HRMS) methods and further supported by Density Functional Theory study. The stoichiometric binding ratio and binding constant (K_a) for complex is found to be 1:1 and 1.50×10⁴, respectively. The detection limit of Sn²⁺ towards chemosensor was found to be 0.3898ppb. Specific selectivity and superiority of chemosensor over another recently reported chemosensor is presented.

Keywords: Benzophenone; Chemosensor; ESIPT; Schiff base; Sn(2+).