Authors : S. Y. Mullemwar, G. D. Zade and S. J. Dhoble
Page Nos : 416-419
Description :
A blue emitting organic phosphors of diphenylquinoline (DPQ) and its attached group were synthesized by Fried-Lander condensation method at 90°C for one hour and then at 140°C for four hours and then cooled for 12 hours with proper purification methods. The characterizations of crystalline materials were studied for physical and chemical parameters from absorption spectra, photoluminescence, FTIR and XRD. A UV-absorption spectrum shows maximum absorption in the spectral range 382 nm. Photoluminescence spectra were recorded in powder form at room temperature which shows excitation at 384 nm where as the emission is at 470 nm. The structural formation and its bonding nature was confirmed by FTIR spectra and it shows strongest peak of 1277.20/cm due to C-N bending vibrations. The crystallographic nature was confirmed by X- ray diffraction spectra which shows strongest peak at 2θ =32.42060 at d = 4.34283 A0 and 2θ =21.11840 at d = 4.20699 A0. The results of polymer regarding structural conformation, thermal and optical properties shows expected results and have a great potential as blue emitters for OLED applications.
