Photoinduced Electron Tunneling Reactions in Chemistry and Biology Review
Source | Photoinduced Electron Transfer IV Compilation, Springer. Berlin, Heidelberg.1992. 250 c. ISBN 978-3-540-55117-1. |
||||
---|---|---|---|---|---|
Journal |
Topics in Current Chemistry
ISSN: 0340-1022 , E-ISSN: 1436-5049 |
||||
Output data | Year: 1992, Volume: 163, Pages: 1-94 Pages count : 94 DOI: 10.1007/3-540-55117-4_4 | ||||
Tags | PHOTOSYNTHETIC REACTION CENTER; CHARGE RECOMBINATION KINETICS; PORPHYRIN-QUINONE MOLECULES; SUBSTITUTED CYTOCHROME-CREACTION CENTER PROTEIN; DONOR-ACCEPTOR SYSTEMS; BLUE COPPER PROTEINS; PYROMELLITIMIDE-BRIDGED PORPHYRINS; RHODOPSEUDOMONAS-SPHAEROIDES R-26; BACTERIAL REACTION CENTERS | ||||
Authors |
|
||||
Affiliations |
|
Abstract:
A comprehensive review is given of the works on electron tunneling at large distances in photoinduced electron transfer reactions. Evidence is presented showing that electron tunneling reactions are rather widely spread in photochemistry and photobiology. The ability to participate in such reactions is inherent in both excited and ground states of various organic and inorganic molecules and radical ions, transition metal complexes and clusters, prophyrins, redox sites of proteins, etc.
The regularities of photoinduced electron tunneling are discussed in detail. The most outstanding feature of electron tunneling is demonstrated to be its ability to provide the occurrence of both primary and secondary reactions of PET between remote electron donor and electron acceptor sites, at distances sometimes as great as several tens of angstroms. It is shown to be responsible also for rather unusual kinetic regularities of certain PET reactions. Electron tunneling can also provide a new type of photoinduced electron transfer reactions, i.e. PET stimulated by illumination into the tunnel electron transfer band.
The rate of the tunnel PET reactions increases strongly when mediator centres are placed in the space between the donor and the acceptor. This effect is the more pronounced the smaller the gap is between the energy of the tunneling electron and the energy levels of the mediator.
The ability of electron tunneling to provide PET at large distances is shown to open up unique opportunities in organizing photochemical conversions on the molecular level. These opportunities are widely used in photobiology as well as in photochemistry of: 1) specially designed organic molecules containing photochemically active electron donor and acceptor sites which are oriented in a certain fashion and linked together by one or several molecular bridges, and 2) photochemically active organized molecular assemblies such as molecular multilayers, micelles, vesicles, etc.
Cite:
Zamaraev K.I.
, Khairutdinov R.F.
Photoinduced Electron Tunneling Reactions in Chemistry and Biology
In compilation Photoinduced Electron Transfer IV. – Springer., 1992. – C.1-94. – ISBN 978-3-540-55117-1. DOI: 10.1007/3-540-55117-4_4 WOS РИНЦ
Photoinduced Electron Tunneling Reactions in Chemistry and Biology
In compilation Photoinduced Electron Transfer IV. – Springer., 1992. – C.1-94. – ISBN 978-3-540-55117-1. DOI: 10.1007/3-540-55117-4_4 WOS РИНЦ
Dates:
Published online: | May 27, 2005 |
Identifiers:
Web of science | WOS:A1992JQ97100001 |
Elibrary | 29830519 |
Chemical Abstracts | 1993:80215 |
Chemical Abstracts (print) | 118:80215 |
OpenAlex | W120918028 |