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The Electronic Spectroscopy of Tyrosine and Phenylalanine Analogs in a Supersonic Jet: Basic Analogs

✍ Scribed by S.J. Martinez; J.C. Alfano; D.H. Levy

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 473 KB
Volume: 158
Category: Article
ISSN: 0022-2852
DOI: 10.1006/jmsp.1993.1056

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✦ Synopsis

The spectroscopy of the basic analogs of phenylalanine and tyrosine has been studied in the gas phase in a supersonic jet using laser-induced fluorescence. There are six tyramine conformers. four phenethylamine conformers, and seven 4-methoxyphenethylamine conformers. Molecular mechanics calculations are used to deduce the most reasonable structures for these conformers. Dispersed emission spectra reveal that the major vibrational activity occurring in these molecules originates from the ring vibrational modes of their respective chromophores. The conformer fluorescence lifetimes of the three molecules were measured. All conformers of a given molecule have the same lifetime. © 1993 Academic Press. Inc.

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