Linear solvation energy relationship of 3-(1′H-indol-3′-yl)-1-phenylprop-2-en-1-ones using Kamlet-Taft and Catalan solvent parameters

Abstract

Steady-state absorption and fluorescence techniques have been used to study the photophysical properties of the fluorescent 3-(1′H-Indol-3′-yl)-1-phenylprop-2-en-1-one (IC) derivatives  via Kamlet-Taft and Catalán treatments. In a refined work of the non-specific interactions of these derivatives in various solvents, a complete set of Kamlet-Taft and Catalán scales has been employed, which enables to separate the polarizability, hydrogen-bond donor and hydrogen-bond acceptor abilities of these derivatives. The Kamlet-Taft and Catalán treatments of these derivatives in the ground state suggest that the IC derivatives can well behave both as hydrogen bond acceptors and donors due to the simultaneous presence of carbonyl and NH groups, whereas, in excited state only the hydrogen bond accepting ability counts.