MATERIAL FOR ORGANIC ELECTROLUMINESCENT DEVICE AND ORGANIC ELECTROLUMINESCENT DEVICE
申请人:Morishita Hironobu
公开号:US20070160871A1
公开(公告)日:2007-07-12
A material for an organic electroluminescent device represented by the following formula (I):
wherein X
1
and X
2
are independently one of specific divalent groups; Y
1
to Y
4
are independently a carbon atom or a nitrogen atom; R
1
to R
4
are independently a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group, a halogen atom, a fluoroalkyl group, or a cyano group; and R
1
and R
2
, and R
3
and R
4
may be bonded together to form a ring, respectively.
PREPARATION AND PROPERTIES OF TETRACYANOQUINODIMETHANS FUSED WITH PYRAZINE UNITS
The title compounds were prepared by a TiCl4-catalyzed condensation reaction of corresponding quinones with malononitrile. The data of the cyclic voltammogram show that the anion radicals of dipyrazino-TCNQ derivatives are thermodynamically stable. The anion radical salts were isolated.
The radicaltrianion of title compound as well as its radical anion was formed by electrolytic reduction of its neutral precursor in acetonitrile at room temperature and characterized by their ESR and calculated spin density distributions.