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Open Access Nano Express

Synthesis and characterization of titanium complex with a dithiolate ligand for green LCD color filter dyes

Hwangyu Shin, Youngil Park, Seungho Kim, Byeong-Kwan An* and Jongwook Park*

Author Affiliations

Department of Chemistry, The Catholic University of Korea, Jibong-ro 43, Bucheon, 420-743, South Korea

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Nanoscale Research Letters 2012, 7:635  doi:10.1186/1556-276X-7-635

Published: 21 November 2012

Abstract

Three green compounds for color filter dyes based on bis(cyclopentadienyl) titanium complexes including dithiolate ligand were synthesized. Physical properties by the change of the substitution groups of the synthesized materials were systematically examined. UV-visible absorption spectrum of the synthesized materials showed maximum absorbing wavelengths of 427 to 430 nm and 632 to 635 nm in solution state, and 434 to 438 nm and 637 to 651 nm in film state, indicating green and black colors. It was observed that the extinction coefficient values (log ε) of all the synthesized materials are very high at 4.0 or above. In addition, it was shown that since the Td values of three synthesized materials show thermal stability higher than 240°C, they possess high potential to be applied as dyes for LCD color filter and black matrix addictive.

Keywords:
Bis(cyclopentadienyl) titanium complex; Pigment; Dyes; Molar extinction coefficiency; Color filter; Black matrix additive; Ligand-to-ligand charge transfer.