thioindigo

thioindigo

[¦thī·ō′in·də‚gō]
(materials)
A group of sulfur dyes made by treating the appropriate organic compound with sodium sulfide; colors are fast to washing and light.
References in periodicals archive ?
in Longmont, CO have shown that the direction of the polarization of ferroelectric liquid crystals can, in fact, be controlled with light, in order to do this, they employ chiral dopants with a thioindigo core that undergo trans/cis isomerization upon exposure to green light (510 nm).
55 To be precise, the patents were for thioindigo, a reddish brown colorant as opposed to general indigo, which is blue.