Optical recording material, chalcone type compounds and metal complexes

An optical recording medium, comprising an optical recording layer disposed on a substrate, the optical recording layer formed of an optical recording material comprising at least one chalcone compound represented by general formula (V)

• wherein,
• n is 0 or 1;
• ring C represents a benzene or naphthalene ring;
• t represents an integer from 0 to 6;
• each R16 is the same or different and represents an alkyl group having 1 to 8 to carbon atoms which may optionally be interrupted by —O—, —CO—, —OCO—, or —COO—, an aryl group having 6 to 30 carbon atoms, an arylalkyl group having 7 to 30 carbon atoms, a metallocenyl group having 10 to 30 carbon atoms, a halogen atom, a hydroxyl group, a nitro group, a cyano group, or a heterocyclic group having 2 to 30 carbon atoms;
• Rd, Re, and Rf each independently represent a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, an aryl group having 6 to 30 carbon atoms, an arylalkyl group having 7 to 30 carbon atoms, a metallocenyl group having 10 to 30 carbon atoms, a halogen atoms, a hydroxyl group, a nitro group, a cyano group, or a heterocyclic group having 2 to 30 carbon atoms;
• s represents an integer from 0 to 4;
• each R15 is the same or different and represents an alkyl group having 1 to 8 carbon atoms which may optionally be interrupted by —O—, —CO—, —OCO—, or —COO—, an aryl group having 6 to 30 carbon atoms, an arylalkyl group having 7 to 30 carbon atoms, a metallocenyl group having 10 to 30 carbon atoms, a halogen atom, a hydroxyl group, a nitro group, a cyano group, or a heterocyclic group having 2 to 30 carbon atoms;
• and
• each of said alkyl group having 1 to 8 carbon atoms, said aryl group having 6 to 30 carbon atoms, said arylalkyl group having 7 to 30 carbon atoms, said metallocenyl group having 10 to 30 carbon atoms, and said heterocyclic group having 2 to 30 carbon atoms of R15, R16, Rd, Re, and Rf may optionally have a substituent.

A metal complex represented by general formula (VI):

• wherein
• ring C represents a benzene or naphthalene ring;
• t represents an integer from 0 to 6;
• each R16 is the same or different and represents an alkyl group having 1 to 8 carbon atoms which may optionally be interrupted by —O—, —CO—, —OCO—, or —COO—, an aryl group having 6 to 30 carbon atoms, an arylalkyl group having 7 to 30 carbon atoms, a metallocenyl group having 10 to 30 carbon atoms, a halogen atom, a hydroxyl group, a nitro group, a cyano group, or a heterocyclic group having 2 to 30 carbon atoms;
• Rd, Re, and Rf each independently represent a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, an aryl group having 6 to 30 carbon atoms, an arylalkyl group having 7 to 30 carbon atoms, a metallocenyl group having 10 to 30 carbon atoms, a halogen atom, a hydroxyl group, a nitro group, a cyano group, or a heterocyclic group having 2 to 30 carbon atoms;
• s represents an integer from 0 to 4;
• each R15 is the same or different and represents an alkyl group having 1 to 8 carbon atoms which may optionally be interrupted by —O—, —CO—, —COO—, or —COO—, an aryl group having 6 to 30 carbon atoms, an arylalkyl group having 7 to 30 carbon atoms, a metallocenyl group having 10 to 30 carbon atoms, a halogen atom, a hydroxyl group, a nitro group, a cyano group, or a heterocyclic group having 2 to 30 carbon atoms;
• M represents a metal atom selected from the group consisting of the elements of the periodic table Groups 2, 8, 9, 10, 11, 12, and 13;
• M1/k represents a structure where k ligands that are the same coordinate to metal M ;
• k is an integer from 2 to 4;
• Anq− represents a q-valent anion ;
• q is 1 or 2;
• and
• p represents a coefficient to keep the charge neutral.

An optical recording material comprising a metal complex having a chalcone compound as a ligand, the metal complex being represented by general formula (VI):

• wherein
• n is 0 or 1;
• ring C represents a benzene or naphthalene ring;
• each R16 is the same or different and represents an alkyl group having 1 to 8 carbon atoms which may optionally be interrupted by —O—, —CO—, —OCO—, or —COO—, and aryl group having 6 to 30 carbon atoms, an arylalkyl group having 7 to 30 carbon atoms, a metallocenyl group having 10 to 30 carbon atoms, a halogen atom, a hydroxyl group, a nitro group, a cyano group, or a heterocyclic group having 2 to 30 carbon atoms ;
• t represents an integer from 0 to 6;
• Rd, Re, and Rf each independently represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, an aryl group having 6 to 30 carbon atoms, an arylalkyl group having 7 to 30 carbon atoms, a metallocenyl group having 10 to 30 carbon atoms, a halogen atom, a hydroxyl group, a nitro group, a cyano group, or a heterocyclic group having 2 to 30 carbon atoms;
• each of said alkyl group having 1 to 8 carbon atoms, said aryl group having 6 to 30 carbon atoms, said arylalkyl group having 7 to 30 carbon atoms, said metallocenyl group having 10 to 30 carbon atoms, and said heterocyclic group having 2 to 30 carbon atoms of R16, Rd, Re, and Rf optionally has a substituent;
• s represents an integer from 0 to 4;
• each R15 is the same or different and represents an alkyl group having 1 to 8 carbon atoms which may optionally be interrupted by —O—, —CO—, —OCO—, or —COO—, and aryl group having 6 to 30 carbon atoms, an arylalkyl group having 7 to 30 carbon atoms, a metallocenyl group having 10 to 30 carbon atoms, a halogen atom, a hydroxyl group, a nitro group, a cyano group, or a heterocyclic group having 2 to 30 carbon atoms;
• M represents a metal atom selected from the group consisting of the elements of the periodic table Groups 2, 8, 9, 10, 11, 12, and 13;
• M1/k represents a structure where k ligand that are the same coordinate to metal M;
• k is an integer from 2 to 4;
• Anq−represents a q-valent anion ;
• q is 1 or 2;
• and
• p represents a coefficient to keep the charge neutral.

An optical recording medium, comprising an optical recording layer disposed on a substrate, the optical recording layer formed of an optical recording material comprising a metal complex having a chalcone compound as a ligand, the chalcone compound being represented by general formula (I):

• wherein,
• ring A represents a 5- or 6-membered heterocyclic ring;
• ring B represents a 5- or 6-membered heterocyclic ring, an aromatic ring, or a metallocene structure;
• the 5- or 6-membered heterocyclic rings and aromatic rings may optionally be condensed with other heterocyclic and aromatic rings or may optionally be substituted;
• and
• n is 0 or 1.