New polyazaporphine chemistry for the origin of life.
Orig Life Evol Biosph
; 28(1): 27-45, 1998 Feb.
Article
in En
| MEDLINE
| ID: mdl-11536854
Molecular orbital spectral predictions suggest that 2,5,7,10,12,15,17,20-octaaza-21H, 23H-porphine has a visible spectral range closely matching that of chlorophyll-a. Since the octaazaporphine is, in its core, a simple derivative of an (HCN)12 oligomer, this fact, together with its spectral properties, would suggest that it occupies a high rank as a primordial porphinic solar energy transducer for photochemistry essential to life's formation. The demonstration that the mass 324 hexahydrooctaazaporphine is formed in protic media by the cyclotetramerization of imidazol-4-aminohydroxonium ion or the derived nitrenium ion, and that a mass 318 species consonant with that of the Huckel aromatic octaazaporphine is observed in the course of these studies, strongly supports the proposed octaazaporphine synthesis in a prebiotic hydrocyanic acid milieu.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Porphyrins
/
Sunlight
/
Hydrogen Cyanide
/
Origin of Life
/
Nitroimidazoles
Language:
En
Journal:
Orig Life Evol Biosph
Journal subject:
BIOLOGIA
/
BIOLOGIA MOLECULAR
Year:
1998
Document type:
Article
Affiliation country:
United States
Country of publication:
Netherlands