Organometallic electronic

This review has demonstrated that a wide variety of organic and organometallic electron donors and a smaller number of electron acceptors can function as coinitiators for the photo-induced polymerization of monomers using photoreducible or photooxidizable dyes as absorbers of incident light. These compositions can be used for a number of applications in the printing, graphics arts, and electronics industries where sensitivity to visible wavelengths is necessary. 

Major reviews of organometallic electron transfer reactivity, including main group metal examples, have appeared in the form of Kochi s book [10] and... 

Table 3. Free energy change, AG°ct, and rate constants, of photoinduced electron transfer from group 14 organometallic electron donors to C, observed rate constants, obs, triplet quenching rate constants, kq, and limiting quantum yields, Oco, in the photoaddition of the donors to in benzonitrile at 298 K [212].

Kochi s book from 1978 [la] helped to establish electron-transfer and radical reactions as a crucial part of mainstream organometallic chemistry. The importance of such reactions is evident from Astruc s book [lb], still the most comprehensive and authoritative book in the area, and from several reviews and review collections [2] on aspects of organometallic electron-transfer reactivity. This chapter will be fully devoted to the use of electrochemical techniques to obtain bond-energy data for organometallic complexes, a topic that has not been previously reviewed. Aspects of the energetics of redox-induced structural changes and isomerizations, a thoroughly pursued topic, has been reviewed [2o] and will not be included here. 

For this discussion, our goal is (1) to describe the properties of typical organometallic compounds relevant to both EDA complex formation and electron transfer, (2) to discuss the electronic and structural charges attendant upon complex formation, and (3) to consider the consequences of the photoinduced electron transfer from the donor to the acceptor by irradiation of the CT band of the EDA complex according to Scheme II. Sensitized organometallic electron-transfer [25] and EDA complexation among inorganic coordination complexes [26] have been previously reviewed and will not be discussed. +... 

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