Aromatic ester compound and second-order non-linear optical material therewith

摘要

Disclosed is a novel aromatic ester compound represented by the general formula in which Pn is a 1,4-phenylene group, R1 is an alkyl group having 1 to 4 carbon atoms, R2 is a group selected from the group consisting of perfluoroalkyl groups having 1 to 4 carbon atoms, cyano group, nitro group, 2,2-dicyanoethenyl group and methylsulfonyl group and the subscript n is a number of 2, 3 or 4. These aromatic ester compounds are useful as a second-order non-linear optical material in the ultraviolet wavelength range so that a resin film containing the compound has a good second-order non-linear optical coefficient d33 of 2-4x10-9 esu.