Synthesis, Characterization, and Electrochemical Study of Tetradentate Ruthenium-Schiff Base Complexes: Dioxygen Activation with a Cytochrome P450 Model Using 1- or 2-Methylimidazole as Axial Bases
Table 4
Electrochemical characteristics of the Ru(III)-complexes 1, 2, and 3 in presence of 1- and 2-methylimidazole under N2 then under O2 atmosphere.
Complex
(mV)a
(mV)
(μA)
(μA)
b
Electrochemical characteristics of the Ru(III)-complexes
With 1-methylimidazole
1
580 (622)
70 (70)
6.4 (10.0)
— (1.2)
0.75
1.75
2
520 (565)
75 (75)
5.6 (11.6)
— (2.0)
0.82
2.42
3
500 (507)
65 (65)
8.8 (14.8)
— (2.0)
0.86
1.90
With 2-methylimidazole
1
580 (622)
70 (70)
6.6 (16.6)
— (0.0)
0.80
2.51
2
520 (565)
70 (70)
6.4 (20.9)
— (0.0)
0.82
3.26
3
500 (507)
75 (75)
9.6 (32.5)
— (0.0)
0.88
2.45
; values obtained under nitrogen. ; values given between brackets are obtained under oxygen.