Radiative Charge Recombination and Electrochemiluminescence

Andersson, Ann-Margret; Schmehl, Russell H.

doi:10.1002/9783527618248.ch9

Cited by 8 publications

(5 citation statements)

References 100 publications

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“…Similar amounts of ECL papers could be also found from the Thomson ISI Web of Science as well as the Scopus database . A considerable number of reviews on a wide variety of ECL subjects also are available in the literature, ,– in addition to a very recently published comprehensive ECL monograph . In this first monograph, an overview and brief history of ECL, both experimental and theoretical aspects of ECL, and a review of the behavior of coreactants, organic molecules, and metal chelates, along with applications of ECL in immunoassay, flow injection, chromatography, capillary electrophoresis, and light production and display devices are thoroughly discussed.…”

Section: Introductionmentioning

confidence: 99%

Electrogenerated Chemiluminescence and Its Biorelated Applications

2008

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Wujian Miao received his undergraduate diploma in chemistry from Nantong University (Nantong, China) in 1982, his M.Sc. degree in analytical chemistry from Zhongshan University (Guangzhou, China, with Jinyuan Mo) in 1991, and his Ph.D. degree in electrochemistry from Monash University (Melbourne, Australia, with Alan M. Bond) in 2000. He then served as a Research Scientist in CSIRO (Melbourne, Australia), followed by a postdoctoral fellowship at the University of Texas at Austin with Allen J. Bard in 2001. Since 2004 he has served as an assistant professor of chemistry at the University of Southern Mississippi.

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Section: Introductionmentioning

confidence: 99%

Electrogenerated Chemiluminescence and Its Biorelated Applications

2008

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“…(4) Decay of excitons CM* through radiative and nonradiative pathways 21a (Chart ) where S(T) CM* is the light-emitting (non-emitting) singlet (triplet) excited state of the organic conjugated material. In Chart , n is equal to 4 if statistical formation of the different spin states of excitons is considered. 15a,57d Analogous equations can be written for the alternative dps sequence reduction−oxidation in which CM - is formed first, followed by CM + formation in the second potential step . For sake of simplicity in eqs 3−5 the exchange of charge-compensating ions C + and A - between LEM and the electrolyte during redox and recombination processes are not described.…”

Section: Phenomenology Of Light Emission In Lecs From Organic Moleculesmentioning

confidence: 99%

“…Emissive transitions can be produced by the excited conjugated organic molecule in either the neutral or (less common) the charged state. Electrochemically driven redox reactions generate chemiluminescence essentially through the occurrence of charge recombination which produces electronically excited systems capable of emitting light upon relaxation. , Such a phenomenology points out the paramount importance of the charge transport properties in light-emitting molecular materials in terms of mobility of both kinds of electronic charge carriers, i.e., holes and electrons (or negative and positive polarons), through the material since it is here considered ECL from conjugated molecules in a condensed phase. ,, Materials of potential interest for ECL generation must be then capable of being simultaneously both n-type and p-type conductors with electronic conductivity values not lower than, let us say, 0.1 S cm -1 , in order to be active materials for ECL.…”

Section: Introductionmentioning

confidence: 99%

Electrochemiluminescence from Organic Emitters

Dini

2005

Chem. Mater.

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Electrically induced light emission from conjugated organic molecules in a condensed phase has constituted one of the most investigated phenomena in the recent past for a variety of reasons. The considerable development achieved in this field has been mainly based on the search of new configurations for luminescent devices such as flexible large area light-emitting diodes, and in the synthesis of improved light-emitting organic materials. In the present review a particular aspect of electrically induced lightemission phenomena from organic materials is considered, namely, organic electrochemiluminescence, which is the phenomenon of light emission from excited organic molecules generated upon occurrence of electrochemically driven redox reactions. Such processes can produce luminescence in the visible range if the resulting oxidized/reduced forms of the conjugated organic molecules form excited species capable of emitting photons within the energy range 1.5-3.5 eV. Electrochemiluminescence from organic emitters in a condensed phase has led to the creation of devices such as light-emitting electrochemical cells, whose realization was decisive in the development of effective light-emitting devices. In the present review the description of the phenomena at the basis of organic electrochemiluminescence is given together with the description of materials and devices configurations for light-emitting electrochemical cells.

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“…Emission is expected from an electron transfer system when the energy difference between reactants and products, E e g 0 ′ 0 , is sufficiently greater than the nuclear reorganizational energy, λ r , , and such electron transfer emissions are well documented for molecules with organic or metal donors (D) and organic acceptors (A). − While such electron transfer emission spectra can provide unique information about the molecular and environmental parameters that govern electron-transfer rates in the Marcus inverted region, ,,,,, the related transition metal-to-transition metal electron transfer (MMCT) emission is extremely rare. , …”

Section: Introductionmentioning

confidence: 99%

Metal-to-Metal Electron-Transfer Emission in Cyanide-Bridged Chromium−Ruthenium Complexes: Effects of Configurational Mixing Between Ligand Field and Charge Transfer Excited States

et al. 2008

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Irradiations of the transition metal-to-transition metal charge transfer (MMCT) absorption bands of a series of cyanide-bridged chromium(III)-ruthenium(II) complexes at 77 K leads to near-infrared emission spectra of the corresponding chromium(II)-ruthenium(III) electron transfer excited states. The lifetimes of most of the MMCT excited states increase more than 10-fold when their am(m)ine ligands are perdueterated. These unique emissions have weak, low frequency vibronic sidebands that correspond to the small excited-state distortions in metal-ligand bonds that are characteristic of transition metal electron transfer involving only the non-bonding metal centered d-orbitals suggesting that the excited-state Cr(II) center has a triplet spin configuration. However, most of the electronically excited complexes probably have overall doublet spin multiplicity and exhibit an excitation energy dependent dual emission with the near in energy Cr(III)-centered and MMCT doublet excited states forming an unusual mixed valence pair.

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Radiative Charge Recombination and Electrochemiluminescence

Cited by 8 publications

References 100 publications

Electrogenerated Chemiluminescence and Its Biorelated Applications

Electrogenerated Chemiluminescence and Its Biorelated Applications

Electrochemiluminescence from Organic Emitters

Metal-to-Metal Electron-Transfer Emission in Cyanide-Bridged Chromium−Ruthenium Complexes: Effects of Configurational Mixing Between Ligand Field and Charge Transfer Excited States

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