Optical information recording medium
View Patent ↗An optical information recording medium containing a substrate having provided thereon a recording layer capable of recording information by laser beam irradiation, wherein the recording layer contains a dye represented by the following general formula (I): wherein R 1 , R 2 , R 3 and R 4 each independently represents a hydrogen atom or a substituent group; R 5 and R 6 each independently represents a hydrogen atom or a substituent group; and B represents a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group, which are derivable from a diazonium salt.
1. An optical information recording medium comprising a substrate having provided thereon a recording layer capable of recording information by laser beam irradiation, wherein the recording layer contains, as a major component, a non-metal azo dye represented by the following general formula (I):
wherein R 1 , R 2 , R 3 and R 4 each independently represents a hydrogen atom or a substituent group; R 5 and R 6 each independently represents a hydrogen atom or a substituent group; and B represents a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group, which are derivable from a diazonium salt,
wherein the optical information recording medium has an improved recording and reproducing property with a laser beam having a wavelength ranging from 390 to 415 nm, and
wherein a surface of said substrate to which said recording layer is provided has pregrooves.
2. The optical information recording medium according to claim 1 , wherein R 1 , R 2 , R 3 and R 4 in general formula (I) each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group; R 5 and R 6 each independently represents a hydrogen atom or a substituent group; and B represents a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group, which are derivable from a diazonium salt.
3. The optical information recording medium according to claim 1 ,wherein the refractive index (n) of the recording layer is 2.0<n<2.7, and the linear attenuation coefficient (k) thereof is 0.03<k<0.10.
4. The optical information recording medium according to claim 1 ,wherein the dye represented by general formula (I) is represented by the following general formula (II):
wherein R 1 , R 2 and R 3 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group; R 5 and R 6 each independently represents a hydrogen atom or a substituent group; and B′ represents a group having a structure selected from the following formulas (a)-1, (a)-2 and (b) to (1):
wherein R 11 , R 12 , R 13 , R 14 , R 15 , R 61 , R 62 , R 63 , R 64 , R 65 , R 66 , R 71 and R 72 each independently represents a hydrogen atom or a substituent group.
5. The optical information recording medium according to claim 1 , wherein either of R 3 and R 4 is a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms or a substituted or unsubstituted aryl group having 6 to 20 carbon atoms, and the other is a hydrogen atom.
6. The optical information recording medium according to claim 1 , wherein R 5 is a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms or a substituted or unsubstituted aryl group having 6 to 20 carbon atoms.
7. The optical information recording medium according to claim 1 , wherein R 6 is a hydrogen atom, an unsubstituted alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted alkoxycarbonyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aminocarbonyl group having 3 to 20 carbon atoms, a carboxyl group or a cyano group.
8. An optical information recording medium comprising a substrate having provided thereon a recording layer capable of recording information by laser beam irradiation, wherein the recording layer contains a non-metal azo dye represented by the following general formula (I):
wherein R 1 , R 2 , R 3 and R 4 each independently represents a hydrogen atom or a substituent group; R 5 represents an unsubstituted alkyl group having 1 to 6 carbon atoms; R 6 represents a hydrogen atom or a substituent group; and B represents a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group, which are derivable from a diazonium salt,
wherein the optical information recording medium has an improved recording and reproducing property with a laser beam having a wavelength ranging from 390 to 415 nm, and
wherein a surface of said substrate to which said recording layer is provided has pregrooves.