Abstract

A DONOR-ACCEPTOR MOLECULE OF VINYL BENZALDEHYDE CONTAINING QUINOXALINE DERIVATIVES FOR PHOTOLUMINESCENCE AND ANTI-BACTERIAL APPLICATIONS

R. Padma and S. Guhanathan*

Abstract

Fluorescent polymers, which are very interesting because of their potential applications in new display technology. Conjugated molecules are particularlay known as electroluminescence (EL) and photoluminescence (PL) materials. Quinoxaline finds many pharmacological activities and electron transport properties. The quinoxaline moiety, which contains electron-withdrawing nitrogen atoms is highly electron deficient and thus serves as an efficient electron acceptor. The present study involves to synthesis vinyl benzaldehyde containing quinoxaline derivatives by Wittig route. Quinoxaline containing segments were publicized to be promising acceptors when combined with vinyl benzaldehyde forming small conjugated donor-acceptor molecule. The synthesised compounds were characterised by FTIR, 1H, 13C, 31P-NMR and Mass. The result of Fluorescent spectral investigation reveals that vinyl benzaldehyde containing quinoxaline derivatives exhibited photoluminescence nature with bluish-green emission maxima at shorter wavelengths of 455nm. Vinyl benzaldehyde containing quinoxaline derivatives were subjected to antibacterial screening against gram positive and gram negative bacteria. The results of anti-bacterial testing revealed that vinyl benzaldehyde containing quinoxaline derivatives showed considerable activity, obtained in terms of MIC, against all the strains used as compared to standard Ampicillin.

Keywords: Wittig reaction, quinoxaline derivatives, photoluminescence, spectral studies, anti-baterial activity.