| abstract |
A novel high-refractive-index compound having polymerizability that is useful as an optical material, and a hologram recording medium having high diffraction efficiency and high light transmittance and low shrinkage using the compound. A compound represented by the following formula (2): (In Formula (2), A 2 is a ring selected from the group consisting of a benzene ring, a naphthalene ring and a dibenzothiophene ring, which may have a substituent, and Ar 2 has a substituent. A spiro carbon-free (hetero) aryl group in which two or more rings are condensed, R is hydrogen or a methyl group, n 2 is an integer of 2 to 7, and a plurality of Ar 2 are the same Or different.) [Selection figure] None |