Conjugated polymers having spiro centers and their use as electroluminescence materials

US5621131A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Willi Kreuder · Mainz, DE
• Donald Lupo · Frankfurt am Main, DE
• Josef Salbeck · Kelkheim, DE
• Hermann Schenk · Hofheim, DE
• Thomas Stehlin · Kriftel, DE

Key dates

• Filing date: Oct 12, 1995
• Grant date: Apr 15, 1997
• Expiry date: Oct 12, 2015

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K85/649
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Conjugated polymers comprising recurring units of the formula (I), ##STR1## A, B, C, D are identical or different and are each from one to fifteen identical or different arylene and/or heteroarylene and/or vinylene groups which, like the spirobifluorene skeleton itself, may be unsubstituted or substituted; PA1 S are identical or different substituents; PA1 m, n are 0 or 1. The polymers of the invention having the formula (I) are suitable as electroluminescence materials and have, in particular, a high color purity of the emission.