Patent ID: 7297449

Claim:
An optical recording medium comprising a recording layer consisting of a matrix polymer; a charge-generating material capable of generating an electron and a hole by light irradiation; a charge-transport material enabling at least said hole to be transported to isolate said electron and said hole; and a trapping material retaining said hole, the optical characteristics of said recording layer being changed in accordance with changes in spatial distribution of said hole and said electron, and said trapping material being a molecule represented by the following general formula (A): wherein CB1 is a conjugated system; and R a and R b may be the same with or different from each other and are individually a group having electron donativity, at least one of R a and R b being a nitrogen-containing heterocyclic group selected from the following groups and bonded through an unsaturated carbon atom of said heterocyclic group to said conjugated system: and wherein and the other of R a and R b may be a residual group having electron donativity and being other than said nitrogen-containing heterocyclic group is at least one selected from the group consisting of allyl alkane; nitrogen-containing cyclic compound; oxygen-containing compound; sulfur-containing compound; and the following groups: wherein R 1 and R 2 may be the same with or different from each other and are individually hydrogen atom, alkyl group, alkoxy group, phenyl group, naphthyl group, tolyl group, benzyl group, benzothiazole group, benzoxazolyl group, benzopyrrol group, benzoimidazolyl group, naphthothiazolyl group, naphthoxazolyl group, naphthopyrrol group, naphthoimidazolyl group or hydroxyl group; at least one of R 1 and R 2 being hydrogen atom, or a group to be bonded, through oxygen atom or saturated carbon atom, to nitrogen atom.