Optically Active Rare Earth Complex Having Circularly Polarized Luminescence

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The present invention relates to a new optically active rare earth complex (1) represented by a general formula (1); (in the formula, X1 and X2 each independently represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 4 carbon atoms or an alkoxyl group having 1 to 4 carbon atoms; Y1, Y2, Y3, and Y4, each independently represents a hydrogen atom, a halogen atom, or an alkyl group having 1 to 4 carbon atoms; R1 represents an alkyl group having 1 to 8 carbon atoms, a fluorine-substituted alkyl group having 1 to 8 carbon atoms, or a phenyl group : R2 is a group selected from the group consisting of (a) cyclopentadienyl groups, (b) phenyl groups, and (c) naphthyl groups).