| 摘要 |
A novel polymerizable high-refractive index compound which is useful as an optical material, and a holographic recording medium using the same, which has high diffraction efficiency, high light transmittance and small rate of shrinkage, are provided. A composition for forming a holographic recording layer containing a reactive compound represented by the following formula 1, a holograph recording material, and a holographic recording medium provided with a recording layer containing the same, are disclosed. (In the formula (1), A is an optionally substituted ring; Ar is an optionally substituted (hetero)aryl group formed by condensation of two or more rings; R is hydrogen or a methyl group; n is an integer of from 1 to 7; and when n is 2 or more, then plural Ars may be the same as or different from each other, provided that when A is an aromatic heterocyclic ring, and Ar is an optionally substituted (hetero)aryl group formed by condensation of two or more rings, then in the structure in which A and Ar are connected with each other, those partial structures that are in the structure of each of A and Ar, and are connected directly with each other, do not contain a heteroatom.)
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