A Study on the Optoelectronic Parameters of 4-Chloromethyl-7-Hydroxy Coumarin in Various Solvents and Concentrations

Abstract

A coumarin derivative, namely 4-chloromethyl-7-hydroxy coumarin (CMEHC), was synthesized inorder to test the concentration and solvent effect on its optical properties. The spectral characterization ofthis compound was accomplished by FTIR and 1H-NMR techniques. The UV absorption spectra of CMEHCcompound in various solvents (THF, DMSO, DMF) were recorded with a UV–VIS spectrophotometer. Theoptical parameters such as maximum peak position, absorption band edge, and direct allowed bandgapwere reported for these solvents and also various concentrations. The lowest direct allowed bandgap wasobtained with THF. The absorbance spectra of CMEHC compound were dominant at the near ultravioletregion. The refractive index values were compared with each other using Moss, Ravindra, Herve-Vandamme,Reddy and Kumar-Singh relations.