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- W2061582840 abstract "The absorption and emission properties of (bpy)2Ru(bb)2+, Ru(bpy)2(bb)Re(CO)3py3+ and (bb)Re(CO)3py1+, where bpy is 2,2′-bipyridine, bb is 1,2-bis(4-methyl-2,2′-bipyridyl-4′-yl)ethane and py is pyridine, were studied in various solvents. Absorptions attributed to dπ(Ru) → π*(1)(bpy) were located between 400 and 500 nm, those attributed to dπ(Ru) → π*(2)(bpy) and dπ(Re) → π*(bb) were found between 300 and 400 nm, and those attributed to π → π* (intraligand) were observed between 200 and 300 nm. The absorption energy maxima of the dπ(Ru) → π*(1)(bpy) transition followed the optical dielectric constant of the solvent defined by the (1−Dop)/ (2Dop+1) relationship. In the heterometallic complex, absorption of light in the 300–400 nm region was partitioned between the ruthenium and rhenium centers. Emission in solution at roam temperature was observed from the ruthenium center upon excitation at either 436 or 355 nm. While emission was also observed from the rhenium center in (bb)Re(CO)3py1+ when excited at 355 nm, none was observed from the rhenium site of the mixed metal complex. The excitation energy absorbed by the rhenium center in this complex was transferred to the ruthenium center with greater than 80% efficiency. The energy transfer process was rapid as noted by the transient absorption spectrum of the heterometallic complex, which contained only the features related to the bpy− radical and the Ru(II) bleach. In addition, an inverse (1−Dop)/(2Dop+1) dependence on the emission energy maxima of (bb)Re(CO)3py1+ was observed." @default.
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- W2061582840 date "1993-11-01" @default.
- W2061582840 modified "2023-10-17" @default.
- W2061582840 title "Solvent dependent behavior of energy transfer in a mixed metal ruthenium(II)/rhenium(I) complex" @default.
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- W2061582840 doi "https://doi.org/10.1016/s0020-1693(00)83835-9" @default.
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