Synthesis of new benzimidazole derivatives designed for the production of white organic light emitting diode

In this thesis, in order to be used in white organic light emitting diodes (WOLED), starting from 2,1,3-benzothiadiazole molecule, 4,7-dibromo-2,1,3-benzothiadiazole, 4,7-diphenyl-2,1,3-benzothiadiazole, 4-bromo-7-phenyl-2.1.3-benzothiadiazole, 1,1':4',1''-terphenyl-2',3'-diamine, 4-Bromobiphenyl-2,3-diamine,2-(4,7-diphenyl-1H-benzimidazole-2-yl)phenol, 2-(4-Bromo-7-phenyl-1H-benzimidazole-2-yl)phenol, [2-(2-Hidroxyphenyl)-7-phenyl-1H-benzimidazole-4-yl]boronic acid, 2,2'-[2,1,3-benzothiadiazole-4,7-diylbis(7-phenyl-1H-benzimidazole-4,2-diyl)]diphenol molecules were synthesized. On the other hand, starting from perylene-3,4,9,10-tetracarboxylic dianhydride dye, N,N'-Bis(2,6-diisopropylphenyl)-1,7-dibromoperylene-3,4,9,10-tetracarboxylic diimide and N,N'-Bis(2,6-diisopropylphenyl)-1,7-bis-(4-bromophenoxy)perylene-3,4,9,10 tetracarboxylic diimide dyes were synthesized, respectively. These dyes were reacted with [2-(2-Hidroxyphenyl)-7-phenyl-1H-benzimidazole-4-yl]boronic acid molecule generated from 2,1,3-benzothiadiazole to give N,N'-Bis(2,6-diisopropylphenyl)-1,7-bis[2-(2-hydroxyphenyl)-7-phenyl-1H-benzimidazole-4-yl]perylene-3,4,9,10-tetracarboxylic diimide and N,N'-Bis(2,6-diisopropylphenyl)-1,7-bis{4-[2-(2-hidroxyphenyl)-7-phenyl-1H-benzimidazole-4-yl]phenoxy}perylene-3,4,9,10-tetracarboxylic diimide molecules for white organic light emitting diodes.Structures of all synthesized compounds have been identified by UV-Vis, fluorescence, FT-IR, 1H-NMR, 13C-NMR spectroscopic methods. Photophysical properties were investigated by fluorimeter measuring the emissions. Also, electrochemical properties were determined with cyclic voltammetry.