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Differentiation of Rubidiated Methyl-d-Glycoside Stereoisomers by Infrared Multiple-Photon Dissociation Spectroscopy in the O–H and C–H Stretching Regions.
- Source :
-
Journal of Physical Chemistry B . Oct2015, Vol. 119 Issue 41, p12970-12981. 12p. - Publication Year :
- 2015
-
Abstract
- Four isomeric sugar methylglycosides (α- and β-d-gluco- and galactopyranosides) were evaluated as rubidium cation coordination adducts in the gas phase using variable-wavelength multiple-photon dissociation in the range from 2750 to 3750 cm–1. The adducts dissociated following photon absorption to yield neutral sugars and the rubidium cation, resulting in infrared “action” spectra. Well-resolved hydroxyl stretching bands clearly differentiate stereoisomers that vary solely in their asymmetry at single carbons. Density functional theory calculations of the lowest-energy gas-phase complexes indicate that rubidium coordinates with lone pairs of oxygen atoms as either bi- or tridentate complexes and that more than one positional coordination isomer could adequately account for most of the O–H stretch frequencies observed for each methylglycoside. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 15206106
- Volume :
- 119
- Issue :
- 41
- Database :
- Academic Search Index
- Journal :
- Journal of Physical Chemistry B
- Publication Type :
- Academic Journal
- Accession number :
- 110443422
- Full Text :
- https://doi.org/10.1021/acs.jpcb.5b06563