THE SYNTHESIS OF 2,3-DIPHENYLQUINOXALINE AND 2,2- (QUINOXALINE-2,3-DIYL)DIPHENOL AS EMMISIVE LAYER OLED (ORGANIC LIGHT EMITTING DIODE

• Main Author: Fatsa Yulia, Astanti
• Format: Final Project
• Language: Indonesia
• Subjects: Kimia
• Online Access: https://digilib.itb.ac.id/gdl/view/35075
• Institution: Institut Teknologi Bandung

OLED (Organic Light-Emitting Diodes) technology has been developed as a flat-screen electronic components for last few years. OLED consists of two to three layers of organic compounds, namely electron transport layer (ETL), emissive layer (EML), and hole transport layer (HTL). This study have been synthesized 2,3-diphenylquinoxaline (1) and 2,2'- (quinoxaline-2 ,3-diyl) diphenol (2) as components of emission layer using MAOS method. Brown crystals of 1 melts at 115-120 ºC with chemical yield of 92.86%. 1H NMR spectrum and 13C NMR of 1 showed a similar pattern compared to literature. Five signals 1H NMR appeared at 7.94, 7.76, 7.60, 7.53, and 7.34 ppm. 13C NMR spectrum of 1 showed typical imine signal at 154.1173 ppm and enamine at 135.8600 and 130.0330 ppm. The existence of imine was also evidenced by IR peaks at 1668 and 1593 cm-1. MS spectrum [M + H]+ of 1 has m/z of 283.1190. Yellow crystals of 2 melts at 170-175 ºC with chemical yield of 42.78%. Seven signals of 1H NMR spectrum of 2 are 11,45 (aromatic hydroxy), 8.03, 7.79, 7.28, 7.27, 7.13, and 6.6919 pm. Four signals of quarternary carbon are showed on 13C NMR spectrum at chemical shift of 157.69, 151.73, 137.90, and 120.73 ppm. Infrared peaks of 2 showed the aromatic hydroxyl group, imine, and enamine at 3448, 1618, and 1581 cm-1. Both 1 and 2 fluorescence at ? 521 nm and 548 nm, respectively. Both compounds have a potency to be applied as green EML of OLED component.