Resonance enhanced multiphoton ionization spectroscopy and theoretical calculations of cis and trans p-methoxystyrene rotamers
The structures and vibrations of p-methoxystyrene in the first electronically excited state (S 1) were studied by mass analyzed resonance-enhanced two photon ionization (R2PI) spectroscopy and theoretical calculations. The ab initio and the density functional theory (DFT) calculations reveal that tw...
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Published in | Journal of molecular structure Vol. 918; no. 1; pp. 154 - 159 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
29.01.2009
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Subjects | |
Online Access | Get full text |
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Summary: | The structures and vibrations of
p-methoxystyrene in the first electronically excited state (S
1) were studied by mass analyzed resonance-enhanced two photon ionization (R2PI) spectroscopy and theoretical calculations. The ab initio and the density functional theory (DFT) calculations reveal that two rotamers,
cis and
trans, are stable in both the ground S
0 state and the excited S
1 state, and their optimized molecular geometries are achieved. The band origins of the S
1
←
S
0 electronic transition of
cis and
trans p-methoxystyrene are measured to be 33242 and 33324
cm
−1, respectively. Assignment of the observed spectral bands of the two rotamers in the excited S
1 state was made mainly based on the ab initio calculations and the conformity with the available data in the literature. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0022-2860 1872-8014 |
DOI: | 10.1016/j.molstruc.2008.07.032 |