Methine and azamethine dyes based on naphthoquinones in nonlinear optics

US5756753A · kind A · utility

Assignee

• BASF SE

Inventors

• Stefan Beckmann · Mannheim, DE
• Karl-Heinz Etzbach · Bischofswerda, DE
• Rudiger Sens · Ludwigshafen, DE

Key dates

• Filing date: Dec 24, 1996
• Grant date: May 26, 1998
• Expiry date: Dec 24, 2016

Classification

• Technology area (CPC G): Physics
• CPC primary: G02F1/3617
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Naphthalene derivatives of the formula ##STR1## where the rings A and B may be benzofused, PA1 X is nitrogen or a radical of the formula CH or CH.dbd.CH--CH, PA1 Z is a heterocyclic radical or additionally, when x is CH.dbd.CH--CH, a 5- or 6-membered aromatic carbocyclic radical, and PA1 R.sup.1, R.sup.2 and R.sup.3 are hydrogen, C.sub.1 -C.sub.4 -alkyl or C.sub.5 -C.sub.7 -cycloalkyl, are useful in nonlinear optics.