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    Université de Fribourg

    Photophysical and redox properties of dinuclear ru and os polypyridyl complexes with incorporated photostable spiropyran bridge

    Jukes, Ron T. F. ; Bozic, Biljana ; Belser, Peter ; Cola, Luisa De ; Hartl, František

    In: Inorganic Chemistry, 2009, vol. 48, no. 4, p. 1711–1721

    Aimed at creating a true photoswitchable energy transfer system, four dinuclear complexes containing ruthenium(II) and osmium(II) metal centers bridged by spiropyran-type linkers were designed and investigated. The bridge in its closed spiropyran form was shown to be a good insulator for energy transfer between the Ru-bpy donor and the Os-bpy acceptor (bpy = 2,2′-bipyridine). On the basis of...

    Université de Fribourg

    Photochemical, photophysical and redox properties of novel fulgimide derivatives with attached 2,2′-bipyridine (bpy) and [M(bpy)₃]²⁺ (M = Ru and Os) moieties

    Jukes, Ron T. F. ; Kühni, Joël ; Salluce, Nunzio ; Belser, Peter ; Cola, Luisa De ; Hartl, František

    In: Dalton Transactions, 2009, p. 3993-4002

    Fulgimides monosubstituted with [M(bpy)₃]²⁺ (M = Ru, Os; bpy = 2,2′-bipyridine) chromophore units and with a single bpy group were synthesized and investigated as components of conceivable dinuclear photochromic switches of luminescence. The E-, Z- and closed-ring (C) photoisomer forms of the bpy-bound fulgimide were successfully separated by semi-preparative HPLC. The same...

    Université de Fribourg

    Synthesis, photophysical, photochemical, and redox properties of nitrospiropyrans substituted with Ru or Os tris(bipyridine) complexes

    Jukes, Ron T. F. ; Bozic, Biljana ; Hartl, František ; Belser, Peter ; De Cola, Luisa

    In: Inorganic Chemistry, 2006, vol. 45, no. 20, p. 8326 -8341

    Photochromic nitrospiropyrans substituted with 2,2'-bipyridine (bpy), [Ru(bpy)₃]²⁺, and [Os(bpy)₃]²⁺ groups were synthesized, and their photophysical, photochemical, and redox properties investigated. Substitution of the spiropyran with the metal complex moiety results in strongly decreased efficiency of the ring-opening process as a result of energy transfer from the excited spiropyran...