VUV response of prebiotic and biotic molecules

Details VUV response of prebiotic and biotic molecules VUV response of prebiotic and biotic molecules

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.496..133s&link_type=abstract

In: Exo-/astro-biology. Proceedings of the First European Workshop, 21 - 23 May 2001, ESRIN, Frascati, Italy. Eds.: P. Ehrenfreu

Biology

1

Exobiology, Organic Molecules

Scientific paper

The VUV photophysics of the prebiotic molecules HCOOH, CH3CN, CH3COOH, HCOOCH3, CH3CHO as well as biotic entities such as simple amino acids and nuclei acid bases are studied in the 6-25 eV photon energy range in the gas phase. We use synchrotron radiation as a light source as well as various experimental techniques, such as photoabsorption spectroscopy, photoionisation mass spectrometry, photofragment fluorescence spectroscopy and photoelectron spectroscopy, to get new insight into photophysical processes occurring in this energy region. We report previously unknown photoionisation and fragmentation appearance energies for five amino acids and three nucleic acid bases. These data indicate that the amino acids are less photostable than the nucleic acid bases under VUV irradiation in the gas phase.

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