Room temperature photochromic liquid crystal [3H]-naphtho[2,1-b]pyrans-photochromism in the mesomorphic state.
Photochromic liquid crystals based on [2H]-chromenes functionalised in the 3,3[prime or minute]-positions by phenyl groups linked to 4-cyano-4[prime or minute]-hydroxybiphenyl groups via alkyl and siloxane spacers as chromophore were synthesised and the photochromic and mesomorphic behaviour was investigated.
Frigoli
Michel
M
Department of Chemistry, University of Hull, Hull, UKHU6 7RX.
Mehl
Georg H
GH