Optical information recording medium

An optical information recording medium comprising a transparent substrate and a recording layer formed thereon, wherein the recording layer contains an extended porphyrin compound represented by the following general formula (1):

• 5
• (wherein R1 to R15 are each independently hydrogen, a halogen, a hydroxyl group, a mercapto group, an amino group, a nitro group, a cyano group, a carboxyl group, a sulfonic acid group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted alkylthio group, a substituted or unsubstituted arylthio group, a substituted or unsubstituted alkylamino group, a substituted or unsubstituted arylamino group, a substituted or unsubstituted carboxylic acid ester group, a substituted or unsubstituted carboxylic acid amide group, a substituted or unsubstituted sulfonic acid ester group, a substituted or unsubstituted sulfonamide group, a substituted or unsubstituted carbonyl group, a substituted or unsubstituted silyl group or a substituted or unsubstituted siloxy group;
• n is an integer of 1 to 8;
• and metal atoms may coordinate to pyrrole nitrogen atoms of the porphyrin ring to form a complex).