Photochemical mer -> fac one-way isomerization of phosphorescent material. Studies by timeresolved spectroscopy for Tris[2-(4',6'-difluorophenyl)pyridine]iridium(III) in solution

Karatsu T; Nakamura T; Yagai S; Kitamura A; Yamaguchi K; Matsushima Y; Iwata T; Hori Y; Hagiwara T

Chemistry Letters, Vol.32, No.10, 886-887, 2003

DOI10.1246/cl.2003.886 Export Citation

Photochemical mer -> fac one-way isomerization of phosphorescent material. Studies by timeresolved spectroscopy for Tris[2-(4',6'-difluorophenyl)pyridine]iridium(III) in solution

Karatsu T, Nakamura T, Yagai S, Kitamura A, Yamaguchi K, Matsushima Y, Iwata T, Hori Y, Hagiwara T

Photochemical characterization is reported for the mer-stereoisomer of fac-tris[2-(4',6'-difluorophenyl)pyridine]iridium(III) (2), which has attracted attention as a electrophosphorescent material. The mer-2 has a much smaller emission-quantum yield and a shorter emission lifetime than those of the fac-isomer. The relation of the photophysical properties of mer-2 and one-way photoisomerization to fac-2 is discussed.