Silicon naphthalocyanines with unsaturated ligands and optical recording medium

US5047312A · kind A · utility

Assignee

• BASF SE

Inventors

• Bernhard Albert · Monsheim, DE
• Peter Neumann · Wiesloch, DE
• Sibylle Brosius · Ludwigshafen, DE

Key dates

• Filing date: Aug 22, 1989
• Grant date: Sep 10, 1991
• Expiry date: Aug 22, 2009

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/146
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

An optical recording medium contains silicon naphthalocyanines of the formula ##STR1## where Nc is the radical of a naphthalocyanine system which may be substituted by alkyl, alkoxy, aryl or aralkyl, and PA0 R.sup.1 and R.sup.2 are each independently of the other a radical of the formula (O).sub.n R.sup.3, where n is 0 or 1 and R.sup.3 is an unsubstituted radical, or ##STR2## where R.sup.3 is as defined above and R.sup.4 and R.sup.5 are each independently of the other alkyl, alkoxy or (O).sub.n R.sup.3 or R.sup.1 is alkyl.