Polycyclic aromatic hydrocarbons - Primitive pigment systems in the prebiotic environment
Polycyclic aromatic hydrocarbons - Primitive pigment systems in the prebiotic environment
- New search for: Deamer, D. W.
- New search for: Deamer, D. W.
The chemical evolution of meteoritic organics in the primitive earth is examined experimentally with attention given to the photochemical effects of hydrocarbon/water mixtures. Also addressed are the generation of amphiphilic products by photochemical reactions and the transduction of light energy into potentially useful forms. Polycyclic aromatic hydrocarbons (PAHs) absorb light and exist in carbonaceous chondrites; PAHs are therefore examined as primitive pigments by means of salt solutions with pyrene, fluoranthene, and pyrene derivatives with hexadecane. The hexadecane undergoes photochemical oxidation and yields long-chain amphiphiles with oxygen supplied by water, and acid pH shifts also occur. PAHs are also tested in lipid bilayer membranes to examine light-energy transduction. Protons are found to accumulate within the membrane-bounded volume to form proton gradients, and this reaction is theorized to be a good model of primitive photochemical reactions that related to the transduction of light energy into useable forms.
Document information
Polycyclic aromatic hydrocarbons - Primitive pigment systems in the prebiotic environment
Advances in Space Research ; 12 , 4 19
1992-01-01
Miscellaneous
No indication
English
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