884 THE SYNTHESIS OF CONJUGATED IMINE DERIVATIVE COMPOUNDS AS POTENTIAL OLED COMPOUND PRECURSORS Ray Putra Prajnamitra and Deana Wahyuningrum Department of Chemistry, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Indonesia Abstract. OLED is a kind of semiconductor which utilizes organic compounds as the emissive layer. The organic compounds usually posses conjugated double bonds system. In this research, two imine derivative compounds have been successfully synthesized. Compound 1, 2,2'-(1E,1'E)-(1,2-phenylenebis(azan-1-yl- 1-ylidene))bis(methan-1-yl-1-ylidene)diphenol, is yellow with chemical yields of 94.27% and melting point of 165 o C. Fluorescence spectroscopy measurement shows fluorescence with a wavelength of 546 nm which is consistent with green color. Mass spectroscopy (ESI-MS) measurement shows [M+H] + m/z peak 317.1292. Infrared spectroscopy measurement revealed C=N vibration wavenumber at 1612.7 cm -1 which is confirmed by the result of the 1 H NMR measurement that shows N=C-H chemical shift at 8.89 ppm and 13 C NMR for imine carbon at 165.68 ppm. Compound 2, (2E,2'E)-2,2'-(1E,1'E)-(1,2-phenylenebis(azan-1-yl-1- ylidene))bis(methan-1-yl-1-ylidene)bis(2,1-phenylene)bis(3-phenylacrylate) is darkish red with chemical yields of 22.26% and melting point range of 170-175 o C. Fluorescence spectroscopy measurement shows fluorescence at three different wavelengths which are at 517 (green), 570 (yellow), and 675 nm (red). Infrared spectroscopy measurement revealed C=N vibration wavenumbers at 1613.3 cm -1 , C=C alkene vibration at 1453.1 cm -1 , and ester vibration at 1213.5 cm -1 which is confirmed by the result of the 1 H NMR measurement that shows N=C-H chemical shift at 9.90 ppm and 13 C NMR for imine carbon at 170.22 ppm. Keywords: OLED, conjugated double bonds, imine, fluorescence 1 Introduction LED (Light Emitting Diode) is a kind of diode which emits light and has been applied for many electronic devices all over the world. Using LED as a component in an electronic device is much more efficient because the energy emitted is lower than any other conventional devices. Nevertheless, the cost needed to produce LED is very expensive, so people are trying to make a cheaper kind of LED. Proceedings of the Third International Conference on Mathematics and Natural Sciences (ICMNS 2010)