Spectroscopy of jet-cooled constrained tryptophan derivatives
- 1 May 1990
- proceedings article
- Published by SPIE-Intl Soc Optical Eng
- p. 820-829
- https://doi.org/10.1117/12.17739
Abstract
We have studied tryptophan derivatives in which rotations about the Cα-Cβ and Cβ-Cγ bonds are restricted by incorporating the a-amino group into a six-membered ring. Samples were volatilized into He flows and cooled via supersonic gas expansions. Both bare molecules and molecules complexed with polar solvent adducts have been studied via laser induced fluorescence spectra and fluorescence lifetime measurements. We compare jet cooled conformer and lifetime results with some in solution. Results obtained for bare molecule and solvent are compared with analogous data for conformationally unconstrained tryptophan derivatives studied earlier. The jet-cooled lifetime data provide indications of the presence of the 1La state.Keywords
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