Photoredox chemistry

Waite, T.D. (1986), "Photoredox Chemistry of Colloidal Metal Oxides", in J.A. Davis and K.F. Hayes, Eds., Geochemical Processes at Mineral Surfaces, Washington, ACS Symposium Ser. No. 323. 

WAITE Photoredox Chemistry of Colloidal Metal Oxides... 

A question of particular interest is whether or not the redox orbitals are essentially metal or ligand based and how this varies as one traverses the series. For example, [Ru(bipy)3]2+ (bipy = 2,2 -bipyridyl), a complex much studied for its photoredox chemistry, has been shown by electrochemical and spectroelectrochemical studies to undergo a series of reversible, ligand-localized electron-transfer reactions about the reversible metal-centred Ru VRu111 couple (reaction 2).9 10... 

See, for example, pp. 403-406 in E. M. Thurman, Organic Geochemistry of Natural Waters, Martinus Nijhoff, Dordrecht, The Netherlands, 1986, and T. D. Waite, Photoredox chemistry of colloidal metal oxides, Chap. 20 in Geochemical Processes at Mineral Surfaces, ed. by J. A. Davis and K. F. Hayes, American Chemical Society, Washington, DC, 1986. 

Horvath, O. Vogler, A. Photoredox chemistry of chloromercurate(II) complexes in acetonitrile. Inorg. Chem. 1993, 32, 5485-5489. 

The view that POMs might represent molecular versions of semiconductor metal oxide particles has been addressed repeatedly by several groups.301,389,394 While POMs and colloidal semiconductor metal oxide particles have some features in common, some features of the both the excited states and the reduced ground states resulting from photoredox chemistry of the two types of clusters are clearly distinct. 

Cu(II) chloride complexes at 308 nm in frozen ethanol produces transient complexes of Cu(l) with a matrix radical (CH,CHOH), and quantitative aspects of the photoredox chemistry of chloro and bromo complexes of Cu(II) have also been examined in fluid methemolic solution. The Cu(II) complexes [Cu(bpy)... 

Hou, Y., Wan, P., Formal Intramolecular Photoredox Chemistry of Anthraquinones in Aqueous Solution Photodeprotection for Alcohols, Aldehydes and Ketones, Photochem. Photobiol. Sci. 2008, 7, 588 596. 

Of course silica coatings, being dielectric, will not be useful direct participants in water photolysis-photoreduction. This fact is demonstrated by the data of Tada et al. (13), reproduced in Figure 3, in which silica coatings ca. 1 nm in thickness [deposited by the so-called liquid-phase deposition or LPD process (14)] inhibit the photoreduction of aqueous silver ions. Researchers of aqueous photoredox chemistry have, however,... 

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