NDLI: Photocatalysis and the origin of life: Synthesis of nucleoside bases from formamide on TiO2(001) single surfaces

Content Provider	PubMed Central
Author	Senanayake, S. D. Idriss, H.
Copyright Year	2006
Abstract	We report the conversion of a large fraction of formamide (NH2CHO) to high-molecular-weight compounds attributed to nucleoside bases on the surface of a TiO2 (001) single crystal in ultra-high vacuum conditions. If true, we present previously unreported evidence for making biologically relevant molecules from a C1 compound on any single crystal surface in high vacuum and in dry conditions. An UV light of 3.2 eV was necessary to make the reaction. This UV light excites the semiconductor surface but not directly the adsorbed formamide molecules or the reaction products. There thus is no need to use high energy in the form of photons or electrical discharge to make the carbon–carbon and carbon–nitrogen bonds necessary for life. Consequently, the reaction products may accumulate with time and may not be subject to decomposition by the excitation source. The formation of these molecules, by surface reaction of formamide, is proof that some minerals in the form of oxide semiconductors are active materials for making high-molecular-weight organic molecules that may have acted as precursors for biological compounds required for life in the universe.
Related Links	http://dx.doi.org/10.1073/pnas.0505768103
Starting Page	1194
File Format	PDF
ISSN	10916490
e-ISSN	10916490
Journal	Proceedings of the National Academy of Sciences of the United States of America
Issue Number	5
Volume Number	103
Language	English
Publisher	National Academy of Sciences
Publisher Date	2006-01-31
Access Restriction	Open
Rights Holder	National Academy of Sciences
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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