| 摘要 |
A nitrogen-containing heterocyclic compound represented by the following formula (I) or (II):wherein X1 and X2 are the same or different, each representing a hydrogen atom, an alkyl group, or an electron attractive group and at least one of which being an electron attractive group; R1 and R2 are the same or different, each representing a hydrogen atom, an alkyl group, an aryl group, an aralkyl group, or an alkoxy group, and the ring Z represents a hydrocarbon ring which may have a substituent or a heterocycle which may have a substituent. The compound of the present invention is capable of emitting light or changing its color upon irradiation of light or under the action of an electric field.
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