Advances in Electrochemical Science and Engineering, Volume - download pdf or read online

By Richard C. Alkire, Charles W. Tobias

ISBN-10: 352729385X

ISBN-13: 9783527293858

ISBN-10: 3527616799

ISBN-13: 9783527616794

ISBN-10: 3527616888

ISBN-13: 9783527616886

This sequence, previously edited by way of Heinz Gerischer and Charls V. Tobias, now edited through Richard C. Alkire and Dieter M. Kolb, has been warmly welcomed via scientists world-wide that's mirrored within the experiences of the former volumes:

'This is an important ebook for researchers in electrochemistry; it covers parts of either primary and functional significance, with reports of top of the range. the fabric is particularly good provided and the alternative of subject matters displays a balanced editorial coverage that's welcomed.' The Analyst

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Extra resources for Advances in Electrochemical Science and Engineering, Volume 5

Example text

It has been shown that the primary excited singlet (with excitation localized on the acceptor or donor subunit) undergoes a solvent-assisted femto/picosecond relaxation to a polar charge-transfer state. The intramolecular charge transfer leads to a large Stokes shift in the fluorescent states. These states are very polar, strongly stabilized in polar solvent, and situated energetically lower than the locally excited singlets of both subunits A and D. Their depopulation is a superposition of the radiative and radiationless electron transfer in the inverted Marcus region.

5 1). In the intermediate cases (rate of triplet-triplet up-conversion comparable Marcus Theory in the Description of ElectrochemiluminescencePhenomena 31 with rate of separation), the final expression is more complicated: 1 exp (-A0/4RT) M 1 (1 - ksep/kupc) exp (-A0/4RT) (54) In the case of rubrene Eq. (54) allows for the quantitative analysis of the relation between T and q5ecl with more detailed discussion of the parameters A, and kupc. The experimental results of the ECL efficiency (at low temperatures, below Tmm)can be linearized in ln(q5ecl) vs.

In the case of a strongly exergonic electron transfer reaction, the formation of the ground state lies far into the inverted Marcus region. Therefore it may be relatively slow compared with the less exergonic formation of the excited states. The yield of production of the emissive state may be given by the ratio of the rate constants of formation of the excited-state and the ground-state products in the electron transfer reaction. This simplest route is the most important case, because the experimental values of the ECL efficiencies may be compared with those theoretically predicted.

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Advances in Electrochemical Science and Engineering, Volume 5 by Richard C. Alkire, Charles W. Tobias


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