Colorimetric and fluorescent sensing of transition metal ions in aqueous medium by salicylaldimine based chemosensor

Duraisamy Udhayakumari; Somasundaram Saravanamoorthy; Sivan Velmathi

doi:10.1016/j.msec.2012.05.005

Colorimetric and fluorescent sensing of transition metal ions in aqueous medium by salicylaldimine based chemosensor

Mater Sci Eng C Mater Biol Appl. 2012 Oct 1;32(7):1878-1882. doi: 10.1016/j.msec.2012.05.005. Epub 2012 May 11.

Authors

Duraisamy Udhayakumari¹, Somasundaram Saravanamoorthy¹, Sivan Velmathi²

Affiliations

¹ Department of Chemistry, Organic and Polymer Synthesis Laboratory, National Institute of Technology, Tiruchirappalli-620 015, India.
² Department of Chemistry, Organic and Polymer Synthesis Laboratory, National Institute of Technology, Tiruchirappalli-620 015, India. Electronic address: velmathis@nitt.edu.

PMID: 34062669
DOI: 10.1016/j.msec.2012.05.005

Abstract

The cation sensing property of highly sensitive chromogenic receptor N, N'-bis (salicylidine)-o-phenylene diamine (receptor 1) was studied by visual observation, UV-vis spectroscopy and fluorescence spectroscopy. The proposed study has been targeted to sense the first transition series metal cations like Fe³⁺, Co²⁺, Ni²⁺ and Cu²⁺. Binding affinity toward Cu²⁺ is found to be of higher magnitude compared to the other three cations mentioned. Receptor 1 on binding with Fe³⁺, Co²⁺ Ni²⁺ and Cu²⁺ ions shows fluorescence enhancement which is due to the inhibition of PET mechanism.

Keywords: Colorimetric titration; Fluorescence spectroscopy; Inhibition of PET; Schiff base; UV–vis spectroscopy.