Absorption spectrum of triplet benzene

Abstract

The absorption spectrum of triplet benzene has been observed by flash photolysis studies of benzene in rigid hydrocarbon glasses at 77°K.

Spectrum and stability of oxygen iodide charge-transfer complex

“…The extra absorption spectra of oxygen iodide complex in chloroform are shown in Figure 9. Owing to the high solubility of oxygen in chloroform, the sensitivity of the Benesi-Hildebrand plot for the determination of the stability constant in high pressures (10) The oxygen concentrations in various salt solutions were calculated from the relation log Cc/C6 = ke[S], where Co and C8 are oxygen concentrations in pure solvent and salt solutions, respectively; [S] is the molar salt concentration, and fc8 is the salting-out constant which is 0.133 M-1 for aqueous KI solutions and 0.10 M-1 for ethanolic Nal solutions at 24°.11 (11) A. Ben Naim, H. Levanon, and G. Navon, unpublished.…”

Effect of semi‐empirical parameters on the triplet energy levels and triplet–triplet transition in benzene

“…The first observed triplet-triplet band is reported [7] to be at 4.89 eV having E 2 1350. Oscillator strength of this band is not known; but from a knowledge of its emin and from the fact that this is a IT -+ IT* transition it appears that the band is a strong one.…”

“…We have deliberately omitted the singlet levels because these have already been treated exhaustively [6]. Another purpose of the present paper is to determine the oscillator strength of the reported triplettriplet bands [7,87 in this molecule.…”

Theoretical study of triplet-triplet absorption spectra of mono andp-di-substituted benzenes with electron-donating substituents

“…However, as far as benzene and its derivatives are concerned, only a few studies have been reported on T-T absorption so far. Godfrey and Porter [7] have recently successfully recorded the absorption spectrum of triplet benzene, in spite of experimental difficulties, which shows a T-T absorption band around 240 m/~ attributable to the strongly allowed 3Blu-+ 3Eg+ transition predicted from theory by Pariser [10]. Measurements of T-T absorption spectra for N,N,N',N'-tetramethyl-p-phenylenediamine (TMPD) [8] and N,N-dimethylaniline (DMA) [9] have very recently been carried out in the visible region with liquid-paraffin solutions by the spectroscopic flash technique in our laboratory.…”

“…Triplet-triplet (T-T) absorption spectra of a variety of aromatic compounds have been measured by the method of steady cross-illumination [1][2][3][4][5] and by the spectroscopic flash method [6][7][8][9]. However, as far as benzene and its derivatives are concerned, only a few studies have been reported on T-T absorption so far.…”