Selective cyanide sensing using a Fe(III) complex of pyridoxal-beta alanine Schiff base

Das, C., Mondal, A., Sengupta, S., Cardin, C. ORCID: https://orcid.org/0000-0002-2556-9995 and Chattopadhyay, S. K. (2022) Selective cyanide sensing using a Fe(III) complex of pyridoxal-beta alanine Schiff base. Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy, 273. 120943. ISSN 1386-1425 doi: 10.1016/j.saa.2022.120943

Abstract/Summary

Fluorogenic chemosensors using pyridoxal derivatized ligands as fluorophore is a rapidly growing field of research. Here we report a new Fe(III) complex, [Fe(HBala-pydx)(Bala-pydx)] (H2Bala-pydx is the Schiff base of pyridoxal with beta-alanine), which can serve as a sensitive and selective turn-on fluorescent sensor for the detection of cyanide(CN−) in micromolar concentrations (L.O.D. is 1.134 µM), via the ligand displacement approach, in aqueous-acetonitrile medium. The Fe(III) complex is adequately characterized by analytical and spectroscopic methods along with X-ray crystal structure determination.