Dipyrromethene-metal chelate compound and optical recording medium using thereof
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United States of America Patent
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Nov 12, 2002
Grant Date -
Apr 25, 2002
app pub date -
Feb 27, 2001
filing date -
Feb 28, 2000
priority date (Note) -
Expired
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Abstract
An optical recording medium comprising at least a recording layer and a reflecting layer on a substrate wherein the recording layer contains at least one dipyrromethene-metal chelate compound represented by general formula (1): ##STR1## wherein R.sup.1 to R.sup.6 independently represent hydrogen, halogen, nitro, cyano, hydroxyl, amino, carboxyl, sulfo, substituted or unsubstituted alkyl with up to 20 carbon atoms, alkoxy, alkylthio, aryloxy, arylthio, alkenyl, acyl, alkoxycarbonyl, carbamoyl, acylamino, aralkyl, aryl or heteroaryl; R.sup.7 represents halogen, aryl, heteroaryl, alkoxy, alkylthio, aryloxy or arylthio; A represents substituted or unsubstituted aromatic or heterocyclic ring with up to 20 carbon atoms; L.sup.1 represents substituted or unsubstituted bivalent residue forming a ring together with carbon atoms to which it attaches and optionally containing a hetero atom; and M.sup.1 represents transition metal element.
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