LCD 컬러필터용 염료와 NIR 색소의 합성 및 특성 연구

Abstract

The thesis entitled "Synthesis and characterization of dye for LCD color filter and NIR colorant" is divided into two parts. In the first part we focused our study on the development of coumarin dye for LCD color filter. The second part deals with development of pentarylene bisimide as an efficient NIR colorant. For the synthesis of coumarin dye, we used the most accessable path which is originally presented by Sir William Perkin. It involves a Perkin reaction between salicylaldehyde and acetic anhydride. The formed coumarin further condensed with 2-amino phenol to get Coumarin-2-one benzoxazole type product. The cynation of Coumarin-2-one benzoxazole was performed to get a bathochromic product. The structure of coumarin dyes was characterized by using NMR, UV/visible spectroscopy and TGA. In second part, we developed a novel NIR-absorbing pentarylene bisimide as a security colorant. We synthesized pentarylene bisimide in five step. In the first step, the dehydrative condensation of perylene-3,4,9,10-tetracarboxylicdianhydride with 2,6-diisopropylaniline in autoclave was proceeded to give perylene monoimide. After then, bromination of the formed perylene monoimide in second step and successive boronic esterification using Miyaura borylation reaction in third step were performed respectively. In forth step, Suzuki coupling of boronic ester derivative of perylene monoimide and dibromo naphthalene was performed to get coupled bisimide product. In final fifth step, we performed the cyclization of the previous coupled bisimide to get the target compound PBI (Pentarylene Bisimide). The synthesized pentarylene bisimide was characterised using UV/VIS/NIR spectrum, TGA and elemental analysis.