Acid-base and electrochemical properties of the MLCT excited states and one-electron-reduced forms of ruthenium(II) complexes containing 2-(2{prime}-pyridyl)pyrimidine and 2,2{prime}-bipyridine in aqueous solution
- Istituto di Fotochimica e Radiazioni d`Alta Energia del CNR, Bologna (Italy)
- Boston Univ., MA (United States); and others
The acid-base and electrochemical properties of the MLCT excited states and the one-electron-reduced forms of the three Ru(bpy){sub 3-p}(pypm){sub p}{sup 2+} complexes, where bpy = 2,2{prime}-bipyridine, pypm = 2-(2{prime}-pyridyl) pyrimidine, and p = 1-3, have been examined in aqueous solution; a determination has been made of the ground- and excited- state electrochemical potentials, the values of the pKa and deprotonation rate constants of the conjugate acids of the excited states and the one-electron-reduced complexes, and the kinetics of the second-order decays of the reduced species. Comparison is made with the behavior of the analogous 10 complexes of the form Ru(bpy){sub 3-m-z}(bpm){sub m}(bpz){sub z}{sup 2+}, where bpm = 2,2{prime}, bipyrimidine, bpz = 2,2{prime}-bipyrazine, m and z = 0-3, and m+z {le} 3, which have been studied in detail before. 25 refs., 7 figs., 3 tabs.
- DOE Contract Number:
- FG02-94ER14484
- OSTI ID:
- 563607
- Journal Information:
- Inorganic Chemistry, Journal Name: Inorganic Chemistry Journal Issue: 11 Vol. 36; ISSN 0020-1669; ISSN INOCAJ
- Country of Publication:
- United States
- Language:
- English
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