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1,1-Diphenyl-2, 2-dicyanoethylene reacts with 10-methyl-9, 10-dihydroacridine in deaerated acetonitrile under irradiation with λ>320nm to give the coupling product 1, 1-diphenyl-1-(10′-methyl-9′-acridinyl)-2, 2-dicyanoethane, which has been characteriz