Manganese complexes electrochemistry

The electrochemistry of oxo-bridged manganese complexes in aqueous solution is characterized by coupled electron and proton-transfer reactions. The cyclic voltammetric behavior of [Mn2 02(phen)4] + in aqueous pH 4.5 phosphate buffer is illustrated in Fig. 12 [97]. It is of interest to compare this result with that obtained for the same complex dissolved in CH3CN (Fig. 9). Two one-electron reactions are observed in each case. However, these correspond to Mn(IV,IV) Mn(IV,III) and Mn(IV,III) Mn(III,III) reductions in the nonaqueous solvent and to Mn(IV,III) Mn(III,III) and Mn(III,III) Mn(III,II) reductions in... 

Ruhlmann L, Zimmermann J, Fudickar W, Siggel U, Fuhrhop J-H (2001) Heterodimers and -trimers of meso-tetra-(isophtalicacid)-porphyrin octaanions with meso- and p-tetramethylpyridinium-porphyrin tetracations and their manganese complexes in water. Electrochemistry, spectroelectrochemistry and fluorescence quenching. J Electroanal Chem 503 1-14... 

Abstract This chapter discusses the electronic absorption spectra and electrochemistry of phthalocyanine complexes which are redshifted to 730nm and beyond. These are mainly manganese phthalocyanine derivatives and phthalocya-nines containing sulfur substituents. The chapter concentrates mainly on the work done during the last 10 years. There are 96 references quoted and three detailed tables on the electronic absorption spectra, redox potentials, and analytes that are electrocatalyzed using manganese and titanium phthalocyanine complexes. 

Ozoemena KI, Nyokong T (2006) Comparative electrochemistry and electrocatalytic activities of cobalt, iron and manganese phthalocyanine complexes axially co-ordinated to mercaptopyridine self-assembled monolayer at gold electrodes. Electrochim Acta 51(13) 2669-2677... 

In addition there has been a recent review of manganese porphyrin chemistry (19) as well as of the aqueous and chloro complexes of the porphyrin species (20). These discussions are complemented by a discussion of the electrochemistry of manganese porphyrin compounds (21). Related studies include the phthalocyanine complexes (22), the manganese (III)-hemoglobin structure (23), and the characterization of macrocyclic complexes of manganese (24, 25). Other relevant chemistry involves the Schiff-base complexes of Mn(III) (26, 27, 28). 

There have been numerous publications concerning electron transfer processes with the participation of macrobicyclic complexes. Moreover, cobalt(II) and cobalt(III) complexes have received the most attention, presumably due to their availability. Several papers deal with electrochemistry of chromium, ruthenium, rhodium, manganese, nickel, iron, and copper complexes. 

Z. Gaillon, N. Sajot, F. Bedioui, J. Devynck, and KJ. Balkus, Jr, Electrochemistry of Zeolite Encapsulated Complexes. Part 3. Characterization of Iron and Manganese SALEN Entrapped in Y Faujasite Type Zeolite. J. Electroanal. Chem., 1993, 345, 157-167. 

R 102 M.R. Bermejo, A.M. Garda-Deibe, A.M. Gonzalez, O.L. Hoyos, M. Maneiro and M. Rey, The Diversity Observed in Manganese(III)- Schiff Base Complexes Models for a Variety of Biological Systems , p. 61 R 103 L.M. Mink and R.K. Boggess, Platinum(II) and Platinum(IV) Tetra-phenylporphyrin Complexes Synthesis, Characterization, and Electrochemistry , p. 125... 

A wide variety of metals can be electrodeposited from room-temperature ionic liquids. The electrodeposition mechanisms of transition metals, lanthanides and Group 13 metals have been investigated as have cobalt,iron, manganese," tin," gold, " " silver, " palladium, " mercury, cerium, and lead, and the actinides. In addition, ionic liquids have been used extensively to study the electrochemistry and spectrochemistry of metal-chloride complexes. ... 

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