Study on the mechanistic classes of fluorescence quenching of tryptanthrin-malononitrile adduct by aniline

Haitham K R Al-Sharifi; Ani Deepthi

doi:10.1016/j.saa.2023.123261

Study on the mechanistic classes of fluorescence quenching of tryptanthrin-malononitrile adduct by aniline

Spectrochim Acta A Mol Biomol Spectrosc. 2023 Dec 15:303:123261. doi: 10.1016/j.saa.2023.123261. Epub 2023 Aug 13.

Authors

Haitham K R Al-Sharifi¹, Ani Deepthi²

Affiliations

¹ Department of Chemistry, University of Kerala, Kariavattom, Trivandrum 695581, India; College of Food Sciences, Al-Qasim Green University, Babylon, Iraq.
² Department of Chemistry, University of Kerala, Kariavattom, Trivandrum 695581, India. Electronic address: [email protected].

PMID: 37597355
DOI: 10.1016/j.saa.2023.123261

Abstract

Mechanistic studies of the fluorescence quenching of 2-(2-chloro-12-oxoindolo[2,1-b]quinazolin-6(12H)-ylidene)malononitrile (2CTMA) with aniline, using solvent mixtures of acetonitrile and 1,4-dioxane at room temperature, by steady-state and time-resolved methods is reported here. It was confirmed that, with the use of the sphere of action static quenching model and finite sink approximation model, that the bimolecular quenching reactions are due to the presence of both dynamic and static quenching processes.

Keywords: Dynamic; Fluorescence; Quenching; Static; Stern–Volmer.