Mechanistic studies of the selective reduction of ruthenium(III) containing trinuclear oxo complexes by l-ascorbic acid in aqueous solution

Investigation of a novel trinuclear μ-oxo ruthenium complex as a potential nitric oxide releaser for biological purposes

“…Besides that, the final spectrum does not match the profile observed either for the species described by Dasgupta et al [49], or for the reducted nitrosilated analog [Ru 3 -O(CH 3 COO) 6 (4-pic) 2 NO] 0 , generated electrochemically [10]. In our case, despite the fact that the spectra changes very little, one can observe the onset of an absorption in between 800 and 1000 nm, characteristic of solvated species [Ru 3 O(CH 3 COO) 6 (L) 2 S] 0 .…”

“…Recently it was reported the reactivity of the analog [Ru 3 O(CH 3 COO) 6 (H 2 O) 3 ] + with ascorbic acid at pH 3.8 (acetate buffer) [49]. The authors have shown that the first reaction step occurs with the selective reduction of one Ru(III) ion concomitantly with the cleavage of one acetate bridge.…”

Kinetics and Mechanism of the Reduction of mer‐Tris‐picolinatoruthenium(III) by L‐Ascorbic Acid

“…[9][10][11] It has been shown that mineral uptake by tissues is far better when the metal is in the form of a picolinato complex. Although the kinetics of analogous systems with some Ru III complexes have been examined in several laboratories, [14][15][16][17][18][19][20] the high electron-transfer rates and/or high reactivity of the ruthenium species in ligand displacement reactions have imposed severe limitations on the reaction conditions used. [10][11][12][13] The aim of this project was to gain further insight into the mechanism of the Ru III Ǟ Ru II transformation and to quantitatively compare the reactivity of the protolytic forms of l-ascorbic acid towards mer-[Ru(pic) 3 ].…”

Synthesis, X-ray Crystallographic, Electrochemical, and Spectroscopic Studies of Bis-(1,10-phenanthroline)(2,2′-bipyridine)cobalt(III) Hexafluorophosphate

“…Such studies include electron transfer reactions with biological reductants such as Lascorbic acid [1,9], application as electron mediators for water splitting [10], reactions in photoelectrochemical cells [11], radiolytic studies [12][13][14][15][16], and dichroism studies [17]. For many years, our research group and collaborators have been interested in studying the electron transfer reactions between small biological molecules and transition metal complexes [18][19][20][21][22][23][24][25][26][27], homogeneous catalysts [28] as well as developing electro-and photo-catalysts for the hydrogen production [29]. Some cobalt-containing complexes [6,7,12,16,30] (see Fig.…”