By Richard C. Alkire, Charles W. Tobias
This sequence, previously edited via Heinz Gerischer and Charls V. Tobias, now edited through Richard C. Alkire and Dieter M. Kolb, has been warmly welcomed by way of scientists world-wide that's mirrored within the stories of the former volumes: 'This is a necessary booklet for researchers in electrochemistry; it covers parts of either basic and useful significance, with reports of top of the range. the cloth is particularly good offered and the alternative of subject matters displays a balanced editorial coverage that's welcomed.' The Analyst
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3 Ruthenium(I1) Chelates In view of the results discussed above it becomes clear that the formation of the lowest excited states (namely triplets) prevails in most organic ECL systems. The overall electron transfer rate seems to be determined mostly by this particular channel. Therefore one may expect that ECL system in which the lowest excited state 45 Marcus Theory in the Description of Electrochemiluminescence Phenomena N 2,2'-bipyridine 4,7-diphenyl- N "0 2,2'-bipyrazine 2,2'-biisoquinoline 2,2'-biquinoline bPZ biq bqu 1,lo-phenanthroline bPY dPh Fig.
116,117]), may be indispensable. , ). g.. correlation of the emission maxima with the oxidation potentials of the donor or with the reduction potentials of the acceptors [ 1191). , [ 1201). 1 Aromatic Hydrocarbons Aromatic hydrocarbons, with the reaction scheme as described above, play the same key role in ECL studies as in organic electrochemistry and organic UV-VIS spectroscopy. 5,6,11,12-Tetraphenyltetracene(rubrene) and 9,lO-diphenylanthracene (DPA) are the most notable examples (Fig.
The most important question is whether the experimentally obtained results can be interpreted quantitatively in the terms of the Marcus theory. Unfortunately, only some of the parameters (Gibbs energies) in the expression for the electron transfer rate constant may be evaluated straightforwardly from pertinent electrochemical and spectroscopic data. Appropriate values of the other terms are not directly available, but some conclusion can be drawn by taking into account the literature data for other similar systems.
Advances in electrochemical science and engineering by Richard C. Alkire, Charles W. Tobias