Abstract
We have shown that ferrous ion at neutral pH photoreduces water to hydrogen with a high quantum yield on excitation with near-ultraviolet light. This simple system also efficiently reduces carbon dioxide (bicarbonate ions) to formaldehyde. Overall, these reactions offer a solution to a dilemma confronting the standard or Oparin-Urey model of the origin of life. If carbon dioxide was the main form of carbon on the primitive earth, the ferrous photoreaction would have provided the reduced carbon necessary to form amino acids and other biogenetic molecules. We believe this system may have been the progenitor to the biological photosynthetic systems.
Keywords: photochemistry, Archaen oceans, Banded Iron Formations, hydrogen, formaldehyde
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Selected References
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- Borowska Z. K., Mauzerall D. C. Efficient near ultraviolet light induced formation of hydrogen by ferrous hydroxide. Orig Life Evol Biosph. 1987;17:251–259. doi: 10.1007/BF02386465. [DOI] [PubMed] [Google Scholar]
- Makar A. B., Tephly T. R. Improved estimation of formate in body fluids and tissues. Clin Chem. 1982 Feb;28(2):385–385. [PubMed] [Google Scholar]
- Mercer-Smith J. A., Mauzerall D. C. Photochemistry of porphyrins: a model for the origin of photosynthesis. Photochem Photobiol. 1984 Mar;39(3):397–405. doi: 10.1111/j.1751-1097.1984.tb08197.x. [DOI] [PubMed] [Google Scholar]
- Stribling R., Miller S. L. Energy yields for hydrogen cyanide and formaldehyde syntheses: the HCN and amino acid concentrations in the primitive ocean. Orig Life Evol Biosph. 1987;17(3-4):261–273. doi: 10.1007/BF02386466. [DOI] [PubMed] [Google Scholar]
- Walker J. C. Carbon dioxide on the early earth. Orig Life Evol Biosph. 1985;16:117–127. doi: 10.1007/BF01809466. [DOI] [PubMed] [Google Scholar]