Spiro compounds and their use as electroluminescence materials

Details Spiro compounds and their use as electroluminescence materials Spiro compounds and their use as electroluminescence materials

1995-04-05

1998-11-24

Tucker, Philip

Compositions

Light transmission modifying compositions

Modification caused by energy other than light

252500, 585 27, 313504, 544230, 546 15, 548136, 548143, 548147, 548216, 5482622, 5482672, 5483007, 548407, G02F 100, H01B 100, H01J 162

Patent

active

058402179

ABSTRACT:
Use of spiro compounds of the formula (I) ##STR1## where K.sup.1 and K.sup.2 are, independently of one another, conjugated systems, in electroluminescence devices.
Preferred compounds of the formula (I) are 9,9'-spirobifluorene derivatives of the formula (II) ##STR2## where the benzo groups can be substituted independently of one another. Compounds of the formula (I) have a good solubility in customary organic solvents, improved film-forming properties and a significantly reduced tendency to crystallize. The production of electroluminescence devices is thereby made easier and their service life is increased.

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Tour, J. et al., "Approaches to Orthogonally Fused Conducting Polymers for Molecular Electronics" J. Am. Chem. Soc. 1990, 112, 5662-5663.
Tour, J. et al., "Spiro-Fused Conducting Polymers for Molecular Electronics" J. Am. Chem. Soc. 1990, 408-409.

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