ESR studies of the thietane and thiirane radical cations in freon matrixes. Evidence for ethylene molecule extrusion from a .sigma.* thiirane dimer radical cation [C2H4S-SC2H4.bul.+]

1987 ◽  
Vol 109 (22) ◽  
pp. 6778-6788 ◽  
Author(s):  
Xue Zhi Qin ◽  
Qing Cheng Meng ◽  
Ffrancon Williams
Keyword(s):  
Radical Cation ◽  
Radical Cations ◽  
Ethylene Molecule ◽  
Dimer Radical Cation

scholarly journals Electromers of the benzene dimer radical cation

2015 ◽  
Vol 17 (16) ◽  
pp. 10624-10629 ◽  
Author(s):  
Anna Błoch-Mechkour ◽  
Thomas Bally
Keyword(s):  
Radical Cation ◽  
Radical Cations ◽  
Potential Surfaces ◽  
Benzene Dimer ◽  
Dimer Radical Cation

The benzene dimer cation, which is prorotypical for dimer radical cations, has been re-investigated computationally. Thereby it was found that it exists in the form of two distinct, but energetically very close-lying “electromers” which both reside on very flat potential surfaces.

scholarly journals Triplet 1-Nitronaphthalene and Competitive Energy and Electron Transfer Reactions With Trans-Stilbene

1999 ◽  
Vol 19 (1-4) ◽  
pp. 397-401
Author(s):  
T. Fournier ◽  
G. D. Scholes ◽  
I. R. Gould ◽  
S. M. Tavender ◽  
D. Phillips ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Radical Cation ◽  
Transient Absorption ◽  
Radical Cations ◽  
Time Resolved ◽  
Polar Solution ◽  
Trans Stilbene ◽  
Energy And Electron Transfer ◽  
High Concentrations ◽  
Dimer Radical Cation

A time resolved resonance Raman (TR3) study of 1-nitronaphthalene (1NN) first triplet excited state in various solvents is combined with ab initio calculations to determine the nature and the geometry of this state in environments of different polarity. A transient absorption and TR3 study of the reactions of triplet 1NN with trans-stilbene (tS) in solution in both non-polar and polar solvents is reported. In polar solution, 31NN acts as an electron acceptor whereas in non-polar solution only energy transfer to tS is observed. Moreover, at high concentrations of tS, the radical cation tS+ reacts with ground-state tS to form a dimer radical cation (tS2)+. Differences between the Raman spectra of the monomeric and the dimeric radical cations are reported in the 1500–1650 cm-1 region. The switch from energy to electron transfer when going from nonpolar to polar solutions is discussed in terms of the Marcus-Hush theory of electron transfer.

Electron n-doping of a highly electron-deficient chlorinated benzodifurandione-based oligophenylene vinylene polymer using benzyl viologen radical cations

2021 ◽  
Author(s):  
Teck Lip Dexter Tam ◽  
Albertus Denny Handoko ◽  
Ting Ting Lin ◽  
Jianwei Xu
Keyword(s):  
Radical Cation ◽  
Radical Cations ◽  
Benzyl Viologen ◽  
Electron Doping ◽  
N Doping ◽  
Polyphenylene Vinylene

Successful electron-doping of highly electron-deficient chlorinated benzodifurandione-based polyphenylene vinylene using viologen radical cation.

Radical cation formation during the adsorption of polycyclic aromatic hydrocarbons on platinum oxide

1973 ◽  
Vol 26 (1) ◽  
pp. 221 ◽  
Author(s):  
JL Garnett ◽  
KJ Nicol ◽  
A Rainis
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Radical Cation ◽  
Aromatic Hydrocarbons ◽  
Hyperfine Splitting ◽  
Radical Cations ◽  
Platinum Oxide ◽  
Adsorbed Species ◽  
Experimental Conditions ◽  
Polycyclic Aromatic

Experimental conditions are reported for resolving the hyperfine splitting of e.p.r. spectra obtained from the interaction of polycyclic aromatic hydrocarbons with platinum oxide. By contrast with earlier interpretations where only a singlet was obtained even with perylene, the present results indicate that the adsorbed species are radical cations.

Radikalionen, 61 [1, 2]Dialkylamino-substituierte Acetylene und Allene:Ionisation, Oxidation und AlCl3-katalysierte Wasserstoffübertragung / Radical Ions, 61 [1, 2]Dialkylamino-substituted Acetylenes and Allenes:Ionisation, Oxidation and AlCl3-Catalyzed Hydrogen Transfer

1984 ◽  
Vol 39 (6) ◽  
pp. 763-770 ◽  
Author(s):  
Hans Bock ◽  
Wolfgang Kaim ◽  
Mitsuo Kira ◽  
Louis Réné ◽  
Heinz-Günther Viehe
Keyword(s):  
Radical Cation ◽  
Hydrogen Transfer ◽  
Radical Cations ◽  
Esr Spectra ◽  
Ionization Potentials ◽  
Radical Ions ◽  
Substituted Acetylenes

AbstractThe photoelectron (PE) spectra of bis(dialkylamino) acetylenes R2N-C≡C-NR2 and of tetrakis(dialkylamino) allenes (R2N)2C=C=C(NR2)2 with R = CH3, C2H5 exhibit characteristic ionization patterns which are assigned to π radical cation states of the two molecular halves twisted against each other. The low first ionization potentials between 7.0 eV and 7.7 eV stimu­lated attempts to oxidize using AlCl3 in H2CCl2 or D2CCl2. The hyperfine structured ESR spectra observed can be unequivocally assigned to the ethylene radical cations R2N-HC=CH -NR2˙⊕ which are formed from the obviously non-persistent species R2N-C≡C-NR2˙⊕ via a hydrogen transfer. During the oxidation of the dialkylamino-substituted allenes no paramagnetic intermedi­ates could be detected, presumably due to a rapid dimerisation of the allene radical cation (R2N)2C=C=C(NR2)2˙⊕.

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