Synthesis and photoluminescent properties of some novel fluorene derivatives

摘要

Two novel fluorene compounds 9,9-bis[4'-(9"-carbazovinylene)-phenyl]fluorene (F-CZV) 4 and 9,9-bis{4'-[2"-phenyl-5"-(3"'-(methacrylamido)phenyl)]-l ",3",4"-oxadiazolylphenyl}fluorene (F-MAOP) 6 were synthesized by the Heck reaction.The structures were characterized by MS,~1H NMR,IR and UV-vis spectroscopy and the photoluminescent (PL) properties were investigated in ethyl acetate by UV-vis absorption and emission spectra.The spectroscopic properties of the two dyes were also analyzed in other solvents.By comparison with 9,9-bis(4'-iodophenyl)fluorene,the absorption and emission spectra of the two dyes showed a shift to higher wavelengths and displayed high fluorescence quantum yields (0.7-0.8),which can make these dyes very useful as new fluorescent probes.