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Charge Transfer and Radical Ions in Photochemistry by Jochen Mattay is a Chemistry article available to read on EtoBox.

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Bimolecular photoreactions usually occur via several steps involving "complex-type'' intermediates (excimers or exciplexes). Although physical chemists have investigated them for nearly thirty years (Fiirster, Weller), and postulated their existence in numerous publications, it is only in the last decade that evidence for an exciplex intermediate in cycloadditions (Culdwell) has been obtained, thereby establishing the link between spectroscopy and synthetic photochemistry. Since then, many investigations have confirmed the role of exciplexes as intermediates in bimolecular photoreactions. The photochemically induced charge transfer from a donor to an acceptor substrate determines not only the bond strengths in the primary exciplex but also influences-via the charge-transfer nature of the complex-the structure of the exciplex and thereby the selectivity of subsequent reactions. Such chemical processes between the donor and the acceptor prevent the reverse transfer of electrons, which usually results in regeneration of the starting materials, thereby only causing the dissipation of energy and occasionally-under specific conditions-the generation of molecules of the starting material

Who reads Charge Transfer and Radical Ions in Photochemistry?

Author

Jochen Mattay

Published

1987

Language

EN

Field

Chemistry (Physical Sciences)