Synthesis of Some Fluorescent Dyes Based on Stilbene Derivatives with Various Substituents and Their Effects on the Absorption Maxima

The six stilbene-based dyes containing benzoxazole substituents to improve solubility of as well the efficiency fluorescence at blue emission were synthesized. In this work, absorption and fluorescent properties synthesized investigated. For derivatization benzoxazolyl stilbene dye, -NO2 -NH2 groups introduced in sequence onto rings. maxima prepared observed range 435 nm~471 nm. addition, dichloromethane was examined for application nonpolar polymer films such PE, PP, PVC so on. N-alkyl determined have a greater alkylated than analogue unsubstituted group. Furthermore, investigation optical effects tortional strain according conformation side group also performed. identifying these properties, geometry, dihedral angle, other parameters calculated by density functional theory time-dependent function using gaussian 09 program.