Materials for light emitting devices and light emitting devices using the same
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United States of America Patent
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Sep 16, 2003
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N/A
app pub date -
Oct 27, 2000
filing date -
Oct 27, 1999
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Abstract
A compound represented by general formula (113): ##STR1## wherein R.sub.1 and R.sub.2 each represents a hydrogen atom, an aliphatic hydrocarbon group, an aryl group or a heterocylic group; Z.sub.1 represents an atomic group necessary to form a heterocycle; L represents a connecting group; and X represents O, S, Se, Te or N--R, wherein R represents a hydrogen atom, an aliphatic hydrocarbon group; an aryl group or a heterocyclic group.
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