Abstract
The π → π* transitions of coumarins in the ultraviolet region have been described on the basis of fluorescence polarization, dichroic spectra, and SCF MO CI results. The two lowest π → π* transitions in coumarin, 4-hydroxy-coumarin, and psoralen were found to be polarized nearly parallel to each other, probably along the long molecular axis. The two lowest π → π* transition moments in 8-methoxypsoralen were found to be oriented with a substantial angle between them, in contrast to the case of coumarin and psoralen. It was not possible to identify any n → π* bands as they are probably obscured by the strong π → π* bands.
| Original language | English |
|---|---|
| Pages (from-to) | 144-157 |
| Number of pages | 14 |
| Journal | Journal of Molecular Spectroscopy |
| Volume | 40 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1971 |
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ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Spectroscopy
- Atomic and Molecular Physics, and Optics
Cite this
Ultraviolet spectra of coumarins and psoralens. / Moore, Thomas A; Harter, Marian L.; Song, Pill Soon.
In: Journal of Molecular Spectroscopy, Vol. 40, No. 1, 1971, p. 144-157.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Ultraviolet spectra of coumarins and psoralens
AU - Moore, Thomas A
AU - Harter, Marian L.
AU - Song, Pill Soon
PY - 1971
Y1 - 1971
N2 - The π → π* transitions of coumarins in the ultraviolet region have been described on the basis of fluorescence polarization, dichroic spectra, and SCF MO CI results. The two lowest π → π* transitions in coumarin, 4-hydroxy-coumarin, and psoralen were found to be polarized nearly parallel to each other, probably along the long molecular axis. The two lowest π → π* transition moments in 8-methoxypsoralen were found to be oriented with a substantial angle between them, in contrast to the case of coumarin and psoralen. It was not possible to identify any n → π* bands as they are probably obscured by the strong π → π* bands.
AB - The π → π* transitions of coumarins in the ultraviolet region have been described on the basis of fluorescence polarization, dichroic spectra, and SCF MO CI results. The two lowest π → π* transitions in coumarin, 4-hydroxy-coumarin, and psoralen were found to be polarized nearly parallel to each other, probably along the long molecular axis. The two lowest π → π* transition moments in 8-methoxypsoralen were found to be oriented with a substantial angle between them, in contrast to the case of coumarin and psoralen. It was not possible to identify any n → π* bands as they are probably obscured by the strong π → π* bands.
UR - http://www.scopus.com/inward/record.url?scp=0000926480&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0000926480&partnerID=8YFLogxK
U2 - 10.1016/0022-2852(71)90016-6
DO - 10.1016/0022-2852(71)90016-6
M3 - Article
VL - 40
SP - 144
EP - 157
JO - Journal of Molecular Spectroscopy
JF - Journal of Molecular Spectroscopy
SN - 0022-2852
IS - 1
ER -