Synthesis and Characterizations of Phenylated Quinoline Derivatives as Organic Blue Luminescent Materials

Abstract

Paper 1: Abstract newlineUsing a structure property relationship for the position and number of methoxy group(s) to newlinetune the optical properties of Diphenyl Quinoline derivatives. Based on our previously newlinesynthesized DPQ we systematically design some novel derivatives with tuned optical newlineproperties. For instance, the rotation of methoxy (-OCH3) group substitutions at three newlinedifferent possible ortho, meta, and para positions on phenyl ring show significant changes in newlineoptical properties of quinoline derivatives. Three new polymeric compounds o-DPQ,m-DPQ, newlineand p-DPQ consisting of 2,4- diphenyl quinoline (DPQ) with a OCH3 group at ortho newline(o)/meta (m)/para (p) positions of the metalatedphenyl ring, respectively, as the main ligands newlinewere synthesized . We realized that OCH3position extremely affects the crucial newlinephotophysical and electronic properties such as emission color, photoluminescence quantum newlineyield(PLQY) and energy levels of these polymeric compounds resulting in OCH3 position newlinedependent performance of their PhOLEDs. These compounds may be used for solution newlineprocessed easily accessible blue emitter in phosphorescent organic light emitting diodes newline(PhOLEDs).. Thus, our investigation reveals that the DPQ derivatives with para-methoxy newlinephenyl groups possess reasonably large amplitudes of their first hyper polarizabilty and good newlineoptical transparency, which can make them attractive candidates for nonlinear optical newlineapplications. newlinePaper 2: Abstract newlineA novel 2,2 -Bis(4-Phenylquinoline)1,4 phenylene (BPQ-P) organic phosphor newlinewas newlinesynthesized in Aragon(Ar) and Nitrogen (N2) atmosphere at 140oC by using Friedlander newlineCondensation reaction. Based on our previously synthesized DPQ, we systemically designed newlinesome novel derivatives with tuned optical properties and the compound showed blue emission newlineunder a UV source. The synthesized organic phosphor is assessed by various characterization newlinetechniques such as FTIR and NMR spectroscopy. Using excitation and emission spectra were newlineanalysed the properties of PL in organic comp