Photochromic dichroic naphtho-pyrans and optical articles containing them

摘要

A naphthopyran compound represented by the formulae (I) to (II) wherein : ▪ mi, Hi2, p, q are each an integer comprised from O to 4 or 5 inclusive; ▪ Ri, R2 and R4, represent a group selected from halogen, H, -Ra, aryl, -OH, -ORa, -SH, -SRa, -NH2, -NR8RaI, -NRbRc, -NRalCORa, -NRaiCO(aryl), -NRai aryl, -N-aryfe, -N(aryl)CO(aryl), -CO-R3, -CO2R3I, -OC(O)-Rd, and -X-(Re)-Y, and linear or branched (Ci-Ci8) perfluoroalkyl group, wherein R3, Rai, Rb, Rc, X, Y, Re, Rd are as defined into the description; ▪ Zi re resent a group selected from: (formules)