다양한 상대 양이온을 갖는 LCD 컬러필터용 Cy3 염료의 제조 및 특성 연구

Abstract

The thesis entitled "Preparation and Characterization of Cy3 Dye with Various Counter Cations for LCD Color Filter" is divided into two part. In the first part, we focused on the development of Cy3 dye with high thermal stability and good solubility for LCD color filter. Cy3 dyes were prepared through the synthetic procedure of two steps. The synthesized Cy3 dyes were charaterized by using NMR, FT-IR, UV/Vis spectroscopy, and TGA. These Cy3 dyes showed maximum absorption wavelength (λmax) in the range of 549-555nm in UV/Vis spectrum. And we confirmed that solubility characteristics and thermal stability of Cy3 dyes were dependent on the structure of counter cation. Cy3 dyes with methyl counter cation and ethyl counter cation have good solubility in organic solvents such as dichloromethane, methanol, PGME and PGMEA. Moreover, Cy3 dye with ethyl counter cation gave excellent thermal stability in TGA thermograms. And Cy3 dye with ethyl counter cation showed good result in photoresist film test. In the second part, we performed experiment to change counter cation of Cy3 dyes with alkoxy substituent for these purposes. These Cy3 dyes were prepared through the synthetic procedure of three steps. The synthesized new Cy3 dyes were charaterized by using NMR, FT-IR, UV/Vis spectroscopy, and TGA. These Cy3 dyes showed purple color and maximum absorption wavelength (λmax) in the range of 578-590nm in UV/Vis spectrum. We confirmed that Cy3 dye’s solubility characteristics was improved by alkoxy substituent. These Cy3 dyes with alkoxy substituent have good solubility in organic solvents such as dichloromethane, methanol, PGME and PGMEA. Especially, Cy3 dye with 4-nitrobenzyl counter cation gave excellent solubility characteristics.