Electronic Spectra of Radical Ions

Rao, C. N. R.; Kalyanaraman, V.; George, M. V.

doi:10.1080/05704927008081690

Cited by 24 publications

(10 citation statements)

References 181 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The spectra obtained for the negative ions of benzene, toluene, and p-xylene by dissolution of alkali metals in organic systems show essentially the same absorption maxima as the corresponding radical cations which should be expected for a one electron deficient original compound. 22 Furthermore the absorption energies of the toluene radical cation from the photodissociation spectra are 3.0 and 4.7 eV23 compared to our values 2.9 and 4.35 eV in the aqueous phase. Thus our assignment of the species to the radical cation seems justified.…”

Section: Resultssupporting

confidence: 53%

Conversion of hydroxycyclohexadienyl radicals of methylated benzenes to cation radicals in acid media

Sehested¹,

Holcman²,

Hart³

1977

J. Phys. Chem.

View full text Add to dashboard Cite

Publication costs assisted by Ris4 National Laboratory Formation of radical cations from the OH adducts of methylated benzenes in acidic aqueous solutions is demonstrated. The radical cation is formed as an intermediate species in the water elimination reaction in which the OH adduct is transformed into the corresponding methylbenzyl radical. The radical cations are also produced in neutral aqueous solution by reacting SOf radical ions with the methylated benzenes. The cations have two absorption bands, an UV band, 280-300 nm, and a visible band, 430-470 nm, with extinction coefficient of about 6500 and 2000 NT1 cnf1, respectively. The formation of the radical cations from the OH adducts depends on the hydrogen ion concentration, feoH adduct+H+ = (1.5 ± 0.5) X 109 M"1 s_1. The radical cations decay in acid solution exclusively into the corresponding methylbenzyl radicals.

show abstract

Section: Resultssupporting

confidence: 53%

Conversion of hydroxycyclohexadienyl radicals of methylated benzenes to cation radicals in acid media

Sehested¹,

Holcman²,

Hart³

1977

J. Phys. Chem.

View full text Add to dashboard Cite

show abstract

“…Oxyanions Analogous photoejections can be sometimes observed in the alkali metal salts of phenols and carboxylic acids. For example, triplet phenoxides and naphthoxides162 (reaction 18) emit + e", Na+ (18) spectroscopically detectable electrons upon photolysis and, in some cases, give reaction products derived from the oxidized radical. If the phenoxide photolysis is conducted in the presence of borohydride, the phenoxyl radical formed by electron ejection can be captured,163 initiating a sequence in which reduction ultimately results, as in eq 19. Photolysis of carboxylate anions may also proceed by initial photoejection.…”

Section: B Electron Photodetachment Spectroscopy136mentioning

confidence: 99%

The photoexcited states of organic anions

Fox¹

1979

Chem. Rev.

View full text Add to dashboard Cite

Contents I. Introduction 253 II. Spectroscopy of Alkali Metal Salts of Organic Anions 254 A. Absorption Spectra 254 1. Radical Anions 254 2. Carbanions (Closed-Shell Anions) 256 3. Oxyanions 257 B. Emission Spectra 258 1. Emission from Oxyanion Excited States 258 2. Quenching by Inorganic Anions 258 3. The Forster Cycle 258 4. Emission from Carbanion Excited States 258 III. Photochemical Reactions of Alkali-Metal Salts of Organic Anions 259 A. Electron Ejection 259 1. Gas-Phase Experiments 259 2. Solution-Phase Experiments 260 B. Altered Excited-State Reactivity 262 C. Isomerizations 263 1. Geometric (Cis-Trans) Isomerizations 263 2. Pericyclic Reactions 263 D. Intermolecular Bond-Forming Reactions

show abstract

“…Several reviews on various aspects of radical ions including ESR studies have appeared in recent literature (67, 133, 164, 242); electronic spectra of radical ions has been reviewed only recently by Rao et al (212). Many of the radical ions are relatively stable in their ground states in solution phase and can be readily examined by spectroscopic methods.…”

Section: ιπ Radical Ions and Ion Pairsmentioning

confidence: 99%