Preparation and Characterization of Cy3 Dye for LCD Color Filter

LCD Color Filter용 Cy3 염료의 제조 및 특성 연구

  • 이상동 (부경대학교 융합디스플레이공학과) ;
  • 현동균 (욱성화학) ;
  • 정연태 (부경대학교 융합디스플레이공학과)
  • Received : 2015.11.12
  • Accepted : 2015.12.24
  • Published : 2016.01.01


In this research, we focused on the improvement of cy3 dye's characteristics for LCD color filter. Solubility and thermal stability are main characteristics of dyes for LCD color filter. We performed experiment to change counter cation of cy3 dyes with alkoxy substituent for these purposes. These cy3 dyes (1b~5b) 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 (${\lambda}_{max}$) in the range of 578~590 nm in UV/Vis spectrum. We confirmed that solubility and thermal stability of cy3 dyes were dependent on the structure of counter cation. Cy3 dyes with alkoxy substituent have good solubility in organic solvents such as dichloromethane, methanol, and acetone. Especially, Cy3 dye with 4-nitrobenzyl counter cation (5b) gave excellent solubility characteristics.


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