Mathematics – Logic
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011iaus..280p.397m&link_type=abstract
The Molecular Universe, Posters from the proceedings of the 280th Symposium of the International Astronomical Union held in Tole
Mathematics
Logic
Scientific paper
Microwave spectroscopy, considered the most definitive gas phase structural probe, can distinguish between different conformational structures since they have unique spectroscopic constants and give separate rotational spectra. However it has been limited to molecular specimens having an appreciable vapor pressure. In general, molecules of biological importance have low vapor pressures and tend to undergo degradation upon heating. The combination of laser ablation with Fourier transform microwave spectroscopy in supersonic jets (LA-MB-FTMW) which overcomes the problems of thermal decomposition has rendered accessible the gas phase structural studies of these molecules. To date different α-, β- and γ-amino acids have been studied using this technique. Even in conformationally challenging systems the preferred conformations can be identified by rotational spectroscopy, as has been illustrated with the assignment of seven low-energy conformers in serine and threonine, six in cysteine and aspartic acid , and nine in γ-amino butyric (gaba). This technique has been successfully applied to the study of monosaccarides. Three conformers of the prototypes α-D-glucose and β-D-glucose have been characterized for the first time in the gas phase. After the first experimental observation of the monohydrated cluster of glycine, complexes between amino acids and nitrogen bases with water have also been investigated to obtain information on the changes induced in the conformational or tautomeric preferences by the addition of solvent molecules. The information given here is relevant for the unambiguous identification of these amino acids and sugars in the interstellar medium.
Alonso Jose L.
Blanco Susana
Cabezas C.
Lopez José C.
Mata S.
No associations
LandOfFree
Amino Acids and Sugars in the Gas Phase: Microwave Data for Astrochemistry does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Amino Acids and Sugars in the Gas Phase: Microwave Data for Astrochemistry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Amino Acids and Sugars in the Gas Phase: Microwave Data for Astrochemistry will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-931552