Combination of Gas Chromatography with Fluorescence and Phosphorescence in Analysis of Petroleum Fractions

Drushel, Harry V.; Sommers, A. L.

doi:10.1021/ac60233a005

Cited by 38 publications

(11 citation statements)

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“…The lifetime of 3Th is in reasonable agreement with the value of 58 ms in ethanol-ether-isopentane at -196 °C, measured by phosphorescence techniques. 12 Local heating due to the intense flash may be responsible for slightly smaller lifetimes observed here. The fact that 3TMTh has a shorter lifetime than 3Th is consistent with its more complex structure.…”

Section: Resultsmentioning

confidence: 70%

2,3,7,8-Tetramethoxythianthrene. A novel ground state triplet dication, the neutral photogenerated triplet, and the radical cation

Goldberg¹,

Crowe²,

Wilson³

et al. 1976

J. Phys. Chem.

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25) That the type 2 transition (see Figure 4) for QNO•is divided into the 2.17and 1.90-eV bands (see Table I) and mixes greatly with the 7 -9 transition (type A) should be noted. ( 26) It Is noted that the orbital energy change of MO 10 and 11 (see Figure 4) of ANO•by introducing the N atom at the 8 position (see Table I) is quite small, since the symmetry of these orbitals is a2, having the nodal plane through the C2 axis, so that the atomic orbital coefficient at the atoms along the C2 axis is zero. We can find the same relation as the above in anthracene and naphthalene, too. The atomic orbital coefficients at the 1 and 8 positions of the anthracene anion radical and at the 1, 4, 6, and 9 positions of the naphthalene anion radical are zero for the lowest vacant MO and the next higher MO of the former, and almost are zero for the lowest vacant MO of the latter. The orbital energies of these MO's are therefore insensitive to the replacement of the carbon atoms by nitrogen. (27) In the case of pyrazine di-W-oxide this fact was confirmed by analysis of photoelectron spectra.24 (28) (a) J.

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Section: Resultsmentioning

confidence: 70%

2,3,7,8-Tetramethoxythianthrene. A novel ground state triplet dication, the neutral photogenerated triplet, and the radical cation

Goldberg¹,

Crowe²,

Wilson³

et al. 1976

J. Phys. Chem.

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“…Although the emitting species were not identified they were probably more complex than pyridine or quinoline. Pyrrolo rings fused to these basic nitrogen compounds could increase the wavelength of emission to 400 µ as in the azaindoles (5).…”

Section: Methodsmentioning

confidence: 99%

“…Since the introduction of the electron capture detector by Lovelock and Zlatkis (6), its possibilities have been used (1,4,5) in spite of the lack of reliable response and difficulty in avoiding unknown interferences.…”

Section: Summary Of Electronic Spectral Datamentioning

confidence: 99%

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Isolation and Identification of Nitrogen Compounds in Petroleum.

Drushel¹,

Sommers²

1966

Anal. Chem.

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“…The most important step of the analytical procedure is a preliminary concentration of the polycyclic aromatic hydrocarbons with subsequent separation of the concentrate for the final identification (8,9). Fluorescence and phosphorescence spectrophotometry (10)(11)(12)(13)(14) represents an optimum method for identifying these compounds.…”

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confidence: 99%