Transition Metal Dithiolene Near-IR Dyes and Their Applications in Liquid Crystal Devices
چکیده
LLE Review, Volume 106 112 Introduction The development of an ideal series of dyes for liquid crystal (LC) device applications represents a formidable synthesis challenge for chemists. To be considered useful for applications in LC devices, the class of dyes under consideration must have (1) a high solubility in the host matrix; (2) good long-term chemical, thermal, and optical stability; (3) low impact on the LC order parameter; (4) a large molar absorptivity; (5) low electrical conductivity; (6) large dichroic ratio; and (7) a mmax located in the region of interest that can be tuned to some extent by relatively simple modifications in molecular structure. Dyes that possess all or nearly all of these properties are, for the most part, readily available for visible-region applications because of the large market for information display applications, which has provided Transition Metal Dithiolene Near-IR Dyes and Their Applications in Liquid Crystal Devices