Sugar synthesis from a gas-phase formose reaction |
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Authors: | Jalbout Abraham F Abrell Leif Adamowicz Ludwik Polt Robin Apponi A J Ziurys L M |
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Institution: | Instituto de Quimica, Universidad Nacional Autonoma de Mexico, Ciudad Universitaria, Mexico D.F. ajalbout@u.arizona.edu |
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Abstract: | Prebiotic possibilities for the synthesis of interstellar ribose through a protic variant of the formose reaction under gas-phase conditions were studied in the absence of any known catalyst. The ion-molecule reaction products, diose and triose, were sought by mass spectrometry, and relevant masses were observed. Ab initio calculations were used to evaluate protic formose mechanism possibilities. A bilateral theoretical and experimental effort yielded a physical model for glycoaldehyde generation whereby a hydronium cation can mediate formaldehyde dimerization followed by covalent bond formation leading to diose and water. These results advance the possibility that ion-molecule reactions between formaldehyde (CH(2)O) and H(3)O(+) lead to formose reaction products and inform us about potential sugar formation processes in interstellar space. |
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