Results 261 to 270 of about 17,253,335 (291)
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The triplet state of pyridoxal
Biochemical and Biophysical Research Communications, 1968Abstract The absorption spectra, as well as the relative distribution of the structures of pyridoxal in aqueous solution, have been investigated in several laboratories ( Williams and Neilands, 1954 ; Metzler and Snell, 1955 ; Anderson and Martell, 1964) .
J E, Wampler, J E, Churchich
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The Journal of Chemical Physics, 1967
Additional proof has been obtained for the fact that the triplet state in DNA and poly dAT resides at the thymine residue by comparing the intensities of the triplet ESR and phosphorescence signals from DNA's from various sources having different (A+T)/(G+C) ratios.
A A, Lamola +4 more
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Additional proof has been obtained for the fact that the triplet state in DNA and poly dAT resides at the thymine residue by comparing the intensities of the triplet ESR and phosphorescence signals from DNA's from various sources having different (A+T)/(G+C) ratios.
A A, Lamola +4 more
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Journal of Molecular Spectroscopy, 1992
Abstract Twenty bands of the a3Πr-X1Σ+ transition of AlBr have been rotationally analyzed involving v′ from 0 to 10 and v″ from 0 to 8. The Π1 component is perturbed in the v = 0 and 1 vibrational levels. A new system has been observed for the first time; it is formed of 26 bands and is interpreted as the b3Σ+-X1Σ+ transition.
BREDOHL, Harald +4 more
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Abstract Twenty bands of the a3Πr-X1Σ+ transition of AlBr have been rotationally analyzed involving v′ from 0 to 10 and v″ from 0 to 8. The Π1 component is perturbed in the v = 0 and 1 vibrational levels. A new system has been observed for the first time; it is formed of 26 bands and is interpreted as the b3Σ+-X1Σ+ transition.
BREDOHL, Harald +4 more
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The triplet state of chloranil
Journal of the Chemical Society D: Chemical Communications, 1969The 500 nm transient observed at very short times after laser flash photolysis (347 nm) of chloranil in outgassed ethanol is assigned to the triplet state of chloranil.
D. R. Kemp, George Porter
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The Journal of Chemical Physics, 1971
The phosphorescence spectra of benzaldehyde-h6, −1d1, −4d1, −3, 5d2 and −d6 have been studied optically in close packed matrices (acetophenone and methyl benzoate) and relaxed matrices (methylcyclohexane and perfluoro-n-hexane) at 4.2°K. All the spectra were sharp and could be analyzed vibrationally. In the close packed matrices, of the 11 possible out-
Motohiko Koyanagi, Lionel Goodman
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The phosphorescence spectra of benzaldehyde-h6, −1d1, −4d1, −3, 5d2 and −d6 have been studied optically in close packed matrices (acetophenone and methyl benzoate) and relaxed matrices (methylcyclohexane and perfluoro-n-hexane) at 4.2°K. All the spectra were sharp and could be analyzed vibrationally. In the close packed matrices, of the 11 possible out-
Motohiko Koyanagi, Lionel Goodman
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The Journal of Chemical Physics, 1963
The sensitization of biacetyl fluorescence and phosphorescence using benzene as donor has been studied at 25°C in aerated and de-aerated hexane solutions. Electronic energy transfer from the lowest excited singlet state of benzene to biacetyl producing either the first or second excited singlet state of biacetyl proceeds with a rate constant (3.3×1010 ...
Jean T. Dubois, Francis Wilkinson
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The sensitization of biacetyl fluorescence and phosphorescence using benzene as donor has been studied at 25°C in aerated and de-aerated hexane solutions. Electronic energy transfer from the lowest excited singlet state of benzene to biacetyl producing either the first or second excited singlet state of biacetyl proceeds with a rate constant (3.3×1010 ...
Jean T. Dubois, Francis Wilkinson
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Chemical Physics Letters, 1989
Abstract Emission of light between 320 and 400 nm, with its peak at 350 nm, has been observed when ammonia is excited at around 300 nm. The emission intensity has been found to increase at higher temperature. The temperature dependence of emission intensity indicates that the excited level is at about 37500 cm −1 above the ground state, presumably ...
Y. Kotagiri +3 more
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Abstract Emission of light between 320 and 400 nm, with its peak at 350 nm, has been observed when ammonia is excited at around 300 nm. The emission intensity has been found to increase at higher temperature. The temperature dependence of emission intensity indicates that the excited level is at about 37500 cm −1 above the ground state, presumably ...
Y. Kotagiri +3 more
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The triplet state of chlorophylls
Journal of the American Chemical Society, 1976The triplet state zero-field splittings and rates of intersystem crossing for the individual triplet spin sublevels in chlorophyll a, chlorophyll b, and zinc-substituted chlorophylls are presented. Whereas there are only small differences in zero-field splitting parameters among the chlorophylls, their kinetics show significant differences. The general
Clarke, R.H. +4 more
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