Excited state spectroscopy of para di-substituted benzenes in a supersonic beam using resonant two photon ionization
✍ Scribed by R. Tembreull; T.M. Dunn; D.M. Lubman
- Publisher
- Elsevier Science
- Year
- 1986
- Tongue
- English
- Weight
- 643 KB
- Volume
- 42
- Category
- Article
- ISSN
- 1386-1425
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✦ Synopsis
Excited state vibronic spectra of paminophenol, p-cresol, pguoroaniline, p-fluorophenol, hydroquinone and p-toluidine have been obtained using resonant two photon ionization supersonic beam mass spectrometry. Despite marked similarities in the spectra, notable differences exist and different para polyatomic substituents in the same molecule show vibronie evidence of their real molecular symmetry of Csv. Expansion of the ring is also noted upon excitation in all cases. Further, it is now evident that the assigmnent of some vibronic bands historically interpreted as sequence structure must be reconsidered since molecules like hvdroouinone are mixtures of cis and trans and others have a vibronic structure arising from the polyatomic haturk of the substituents (c$ CH3).