Fluorescence quenching of some aromatic amines by ethylene trithiocarbonate in solution

Abstract

The interaction of some aromatic amines such as o-aminobenzoic acid, methyl anthranilate, and o-m-p-toluidines with very dilute solutions of ethylene trithiocarbonate (ETTC) have been studied employing steady-state fluorescence quenching measurements and time-correlated single-photon counting spectroscopy. Electronic excitation transfer and static quenching is assumed to describe the higher bimolecular rate constants for the toluidine–ETTC systems. In addition, the possible interpretation of the quenching mechanism is discussed in relation to the electron-transfer between colliding species.