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>Direct absorption spectra of higher excited states of jethyphen;cooled monosubstituted benzenes: Phenylacetylene, styrene, benzaldehyde, and acetophenone
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Direct absorption spectra of higher excited states of jethyphen;cooled monosubstituted benzenes: Phenylacetylene, styrene, benzaldehyde, and acetophenone
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机译：Direct absorption spectra of higher excited states of jethyphen;cooled monosubstituted benzenes: Phenylacetylene, styrene, benzaldehyde, and acetophenone
The second pgr;rarr;pgr;ast; absorption bands of phenylacetylene, styrene, benzaldehyde, and acetophenone cooled in supersonic molecular jets are investigated by direct ultraviolet absorption spectroscopy. New vibronic structure is observed and vibrational assignments are discussed. The most prominent vibronic bands arise from motions centered in the substituent and from substituenthyphen;sensitive benzene modes. This contrasts with the spectra of the first pgr;rarr;pgr;ast; transitions of these molecules, which exhibit structure involving ringhyphen;localized motions primarily. The spectra presented here demonstrate the utility of the direct absorption technique in the investigation of higher electronic transitions of jethyphen;cooled molecules.
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