Conjugated polymers having spiro centers and their use as electroluminescence materials
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United States of America Patent
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Apr 15, 1997
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Oct 12, 1995
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Oct 14, 1994
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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; S are identical or different substituents; 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.
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