Solid adenine and seawater salts exposed to gamma radiation: An FT-IR and EPR spectroscopy analysis for prebiotic chemistry
João Paulo T. Baú,
Daniel F. Valezi,
Sául A. Villafañe-Barajas,
María Colín-García,
Alicia Negrón-Mendoza,
Eduardo Di Mauro,
Dimas A.M. Zaia
Affiliations
João Paulo T. Baú
Laboratório de Química Prebiótica, Departamento de Química-CCE, Universidade Estadual de Londrina, 86051-990, Londrina, PR, Brazil
Daniel F. Valezi
Laboratório de Ressonância Paramagnética Eletrônica (LARPE), Departamento de Física-CCE, Universidade Estadual de Londrina, 86051-990, Londrina, PR, Brazil
Sául A. Villafañe-Barajas
Instituto de Geología, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, Cd. Mx., Mexico
María Colín-García
Instituto de Geología, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, Cd. Mx., Mexico; Corresponding author.
Alicia Negrón-Mendoza
Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, Cd. Mx, Mexico
Eduardo Di Mauro
Laboratório de Ressonância Paramagnética Eletrônica (LARPE), Departamento de Física-CCE, Universidade Estadual de Londrina, 86051-990, Londrina, PR, Brazil
Dimas A.M. Zaia
Laboratório de Química Prebiótica, Departamento de Química-CCE, Universidade Estadual de Londrina, 86051-990, Londrina, PR, Brazil; Corresponding author.
Solids of adenine obtained from distilled water and seawater lyophilized solutions were γ irradiated at a 94.52 kGy dose. Results indicate that pure solid adenine had a low degradation rate, likewise the solid containing seawater salts. However, EPR spectroscopy analysis suggests a high interaction of the radiation with seawater salts, by radical formation in sulfate ions. These outcomes are of interest for prebiotic chemistry, since ions could have played important roles in chemical evolution. In addition, Martian soil is rich in sulphate salts, thus these salts could protected organic molecules being degraded by γ-radiation.
