Redox behavior

Guldi D M, Hungerbuhler H and Asmus K-D 1995 Unusual redox behavior of a water soluble malonio aoid derivative of Cgg evidenoe for possible oluster formation J. Phys. Chem. 99 13 487-93... 

The redox behavior of the SeSO -Zn-EDTA system has been discussed on the basis of Pourbaix and solubility diagrams [11], Different complexes and substrates have been employed in order to optimize the electrodeposited thin films. By the selenosulfate method it is generally possible to grow ZnSe with an almost stoichiometric composition however, issues of low faradaic efficiency as well as crystallinity and compactiveness of the product, remain to be solved. Interestingly, in most reports of photoelectrochemically characterized ZnSe electrodeposits, the semiconductor film was found to be p-type under all preparation conditions (ZnSe is normally n-type unless deliberately doped p-type). 

The redox behavior in the silver-selenium-water system at ambient and higher (85 °C) temperatures was studied by Petrov and Belen kii [163]. According to their voltammetry results, and the presented Pourbaix diagram (Fig. 3.9), the stability... 

Figure 1. The redox behavior of I,4-dlhydrobenzene at a deactivated versus various activated glassy carbon electrodes.

Barranco, E.M., Crespo, O., Gimeno, M.C., Jones, P.G., Laguna, A. and Villacampa, M.D. (1999) Synthesis, structure and redox behavior of gold and silver complexes with 3-ferrocenylpyridine. Journal of Organometallic Chemistry, 592(2), 258-264. 

Evans RW, Attard GA. 1993. The redox behavior of compressed bismuth overlayers irreversibly adsorbed on Pt(lll). J Electroanal Chem 345 337-350. 

Anderson RF (1987) Redox behavior of uranium in an anoxic marine basin. Uranium 3 145-164 Anderson RF, Fleisher MQ, LeHuray AP (1989) Concentration, oxidation state, and particulate flux of uranium in the Black Sea. Geochim Cosmochim Acta 53 2215-2224 Back W, Hanshaw BB, Pyler TE, Plummer LN, Weiede AE (1979) Geochemical significance of groundwater discharge in Caleta Xel Ha, Quintana Roo, Mexico. Water Res 15 1521-1535 Barnes CE, Cochran JK (1990) Uranium removal in oceanic sediments and the oceanic U balance. Earth. Planet. Sci. Lett 97 94-101... 

FIGURE 6.24 Redox behavior of the methano-dimer of a-tocopherol (bis(5-tocopheryl) methane, 28) temperature dependence of the oxidation with bromine. 

While tocopherylacetic aicd (51), the lower Crhomologue of 3-(5-tocopheryl)-propionic acid (50) showed a changed redox behavior (see Section 6.5.1), compound 50 displayed the usual redox behavior of tocopherol derivatives, that is, formation of both ortho- and para-quinoid oxidation intermediates and products depending on the respective reaction conditions. Evidently, the electronic substituent effects that... 

FIGURE 6.38 Redox behavior and thermal degradation of 5-tocopherylacetic acid (51), involving an o-QM formed by involvement of C-4 and 0-1. 

Redox behavior of anthraquinone is shown in Scheme 4. The quinone moiety may be reduced to the hydroquinone form and converted to a leuco salt under alkali conditions. In general, the leuco salt has a strong affinity for cellulose and is soluble in water. The hydroquinone form is insoluble in water and has low affinity to cellulose. The preferred dyeing procedure depends on the structure and properties of the vat dye. The variables that are used to control the process include, e.g., strength and amount of alkali, reduction temperature, and the presence of salts. During the process of reduction, some side reactions, such as overreduction, hydrolysis,... 

The redox behavior of aminonaphthoquinones has been investigated by Matsuoka and co-workers.11 Reduction of quinoxaline quinone (40) by sodium dithionite in aqueous sodium hydroxide gives the corresponding leuco dye (41) which absorbs at 445nm. Compound 40 shows quinone-... 

Fornasiero, P., Kaspar, J. and Graziani, M. (1997) Redox behavior of high surface area Rh-loaded Ce05Zr05O2 mixed oxide, J. Catal. 167, 576. 

Uenishi, M., Tanigushi, M., Tanaka, H. et al. (2005) Redox behavior of palladium at start-up in the perovskite-type LaFePdO automotive catalysts showing a self-regenerative function, Appl. Catal. B 57, 267. 

The redox behavior of Nr1 tetraazaannulene complexes can be tuned by the appropriate choice of substituents bound to the ligand scaffold.158 It is interesting to note that in a series of Jager-type Ni11 complexes, both the type (27) and type (28) systems give reversible oxidation, while (29) does not.159... 

Octaethylbilindione (H3OEB) is a convenient model for the bile pigment biliverdin IXa. Key redox states of this ligand as observed in its complexes are shown in Figure 14. The redox behavior of the palladium complex of octaethylbilindione was examined in order to determine the generality of the redox behavior of this group of transition metal complexes.202 A preliminary report on the novel tetrameric Pd4(OEB)2, which contains palladium) ) ions 7r-bonded to C=C bonds of the tetrapyrrole ligand, and of Pdn(OEB ) has appeared.203... 

To provide a model for nitrite reductases72 Karlin and co-workers characterized a nitrite-bound complex (226) (r = 0.05)214 In an endeavor to model nitrite reductase activity, Tanaka and co-workers prepared a few mononuclear complexes (227) (r = 0.74)215 (228) (r = 0.82),216 (229) (r = 0.97),217 (230) (r = 0.16),217 (231) (r = 0.07),217 and (232) (r = 0.43 and r = 0.53)217 and studied the electrochemical reduction of N02A As a part of their activity on modeling heme-copper terminal oxidases, Holm and co-workers prepared complex (233) (r = 0.96).218 Using a sterically hindered tris(pyridylmethyl)amine, Canary et al. prepared a complex (234) (r=1.00), studied its redox behavior, and discussed various factors that may contribute to the difference (higher potential for the new complex) in the redox potential of a Cu Cu1 couple between substituted and unsubstituted ligands.2 9... 

Macrocycles attached to redox responsive groups such as ferrocene (78) can give selective transition metal ion receptors. The X-ray structure reveals a five-coordinate zinc with distorted square-pyramidal geometry bound to the four macrocycle nitrogens and an iodide. In the solid state the two ferrocenyl groups are positioned on the same side of the ligand with distances to the metal center of 5.347(7) and 6.120(8) A and these distances can be related to the redox behavior.689... 

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