STUDIES ON PHOTOACTIVATED ELCTRON-TRANSPORT SYSTEMS. II. ELECTRON-TRANSFER QUENCHING OF PHOTOEXCITED RUTHENIUM(II) COMPLEXES BY VARIOUS BIPYRIDINIUM IONS

descriptionPublicationkeyboard_double_arrow_right Article 01 Sep 1978 English Publisher:Oxford University Press (OUP)Journal:Chemistry Letters, volume 7, pages 983-986 (issn: 0366-7022, eissn: 1348-0715,

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Authors: Keisuke Takuma; Yoshito Shuto; Taku Matsuo;

doi: 10.1246/cl.1978.983

STUDIES ON PHOTOACTIVATED ELCTRON-TRANSPORT SYSTEMS. II. ELECTRON-TRANSFER QUENCHING OF PHOTOEXCITED RUTHENIUM(II) COMPLEXES BY VARIOUS BIPYRIDINIUM IONS

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Abstract

Abstract Rate constants for quenching emission from photoexcited tris-(2,2′-bipyridine)- and tris(1,10-phenanthroline)Ru(II) complexes by bipyridinium ion vary with the redox potential of the quencher. Annihilation of the geminate ion pairs at the quenching step can be reduced by the addition of EDTA. The effect of EDTA increases with the concentration but quickly reaches asymptotic values as expected in the presence of an extremely fast geminate recombination of ion pairs in a cage.

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