| 摘要 |
A naphthopyran compound represented by the formula B1 and B2 are selected from a phenyl, naphthyl, or heterocyclic aromatic group, or may combine to form one or more aromatic rings. B1 and B2 are optionally substituted with one or more substituents. R3, R4, R5, R6, and R10 are selected independently from hydrogen, halogen,—Ra,—OH,—ORa,—O—CO—Ra,—CN,—NO2,—SO2Ra,—SORa,—SH,—SRa,—NH2,—NHRa,—NRaRa, and—NRbRc. Any two or more of R5, R6 or R10 may combine to form a cyclic group. R7 is a mesogenic group containing at least two rings connected to each other through a covalent bond or linking unit. The linking unit is an ester,—Rd—,—O—,—ORd—,—ORdO—,—OCORd—,—OCORdO—,—S—,—CH═CH—,—CH═N—,—C≡C—, or—N═N—, where Rd is a linear or branched (C1-18)alkyl or a linear or branched (C1-18)haloalkyl group. The naphthopyran compound may be incorporated into an optical article. |
