Ruthenium(II) Polypyridine Complexes and the Electron-Transfer Reactions of Metalloproteins

1997 ◽  
Vol 74 (6) ◽  
pp. 636 ◽  
Author(s):  
Bill Durham ◽  
Frank Millett
Keyword(s):  
Electron Transfer ◽  
Transfer Reactions ◽  
Electron Transfer Reactions ◽  
Polypyridine Complexes

Steric effects in the photoinduced electron transfer reactions of ruthenium(II)-polypyridine complexes with 2,6-disubstituted phenolate ions

2001 ◽  
Vol 3 (11) ◽  
pp. 2063-2069 ◽  
Author(s):  
Thangamuthu Rajendran ◽  
Pounraj Thanasekaran ◽  
Seenivasan Rajagopal ◽  
George Allen Gnanaraj ◽  
Chockalingam Srinivasan ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Transfer Reactions ◽  
Steric Effects ◽  
Electron Transfer Reactions ◽  
Polypyridine Complexes

Kinetics of electron-transfer reactions of the Co(bpyO2)32+/3+ couple in acetonitrile

1992 ◽  
Vol 70 (1) ◽  
pp. 39-45 ◽  
Author(s):  
Donal H. Macartney ◽  
Samuel Mak
Keyword(s):  
Electron Transfer ◽  
Exchange Rate ◽  
Rate Constants ◽  
Marcus Theory ◽  
Transfer Reactions ◽  
Electron Transfer Reactions ◽  
Cross Reactions ◽  
The Cross ◽  
Polypyridine Complexes ◽  
Kinetics Of

The kinetics of the outer-sphere electron transfer reactions of tris(1,1′-dioxo-2,2′-bipyridine)cobalt(II) and (III) with a series of nickel polyaza macrocycles, FeL3n+ and OsL32+ complexes (L is 2,2′-bipyridine or 1,10-phenanthroline, and substituted derivatives), and Rh2(O2CCH3)4(CH3CN)2+ have been investigated in acetonitrile at 25.0 °C. An application of the Marcus theory relationship to the cross-reaction rate constants yielded apparent Co(bpyO2)32+/3+ self-exchange rate constants of 102 M−1 s−1 from the nickel macrocycle cross-reactions and 10−1 M−1 s−1 from the cross-reactions with the metal polypyridine complexes. The latter cross-reactions are considered to be non-adiabatic due to a mismatch in the donor/acceptor orbital symmetries. The electron exchange rate constant is compared with the exchange rate constants for other Co(II)/Co(III) complex couples and M(bpyO2)32+/3+ couples of other first-row transition metals, and discussed in terms of inner-sphere and solvent reorganization barriers. Keywords: electron transfer, Marcus theory relationship, cobalt(II)/(III) couples, 1,1′-dioxo-2,2′-bipyridine.

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