Study of the reaction between ammonium thiocyanate and Fe (II) or Fe (III) using infrared spectroscopy: an experiment of prebiotic chemistry.

Study of the reaction between ammonium thiocyanate and Fe (II) or Fe (III) using infrared spectroscopy: an experiment of prebiotic chemistry.

Authors

  • Henrique de Santana Universidade Estadual de Londrina
  • Kelli Esteves Vieira Universidade Estadual de Londrina
  • Cássia Thaïs Bussamra Vieira Zaia Universidade Estadual de Londrina
  • Dimas Augusto Morozin Zaia Universidade Estadual de Londrina

DOI:

https://doi.org/10.5433/1679-0375.2010v31n1p15

Keywords:

Prebiotic chemistry, Ammonium thiocyanate, Iron, Guanidine,

Abstract

The prebiotic chemistry studies the reactions that could be played an important role on origins of life on Earth. However, these reactions should be carried out under conditions that existed on the prebiotic Earth. The laboratory experiments of heating substances in solid state could be corresponding to the following prebiotic environments: cooling lava from volcanoes on the ground and impact of meteorites or comets on the earth. The present study examined the reaction in solid state between ammonium thiocyanate and Fe (II) or Fe (III). The samples were heated at 220 ºC in several different times (6 hours, 24 hours, 7 days). The most important finding of this work is that a reaction of oxidation-reduction is occurring between Fe (II) and ammonium thiocyanate, the infrared spectrum of the reaction product ammonium thiocyanate/Fe (II) showed a band that it is characteristic of ferricyanate. The infrared spectra also showed bands that they are characteristics of guanidine thiocyanate. Thus, the heating of ammonium thiocyanate with Fe (II) in solid state is synthesizing guanidine thiocyanate and at the same time oxidizing Fe (II) to Fe (III). The product of reaction between Fe (III) and ammonium thiocyanate is guanidine thiocyanate. Fe (II) and Fe (III) are reacting with ammonium thiocyanate in different way.

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Author Biographies

Henrique de Santana, Universidade Estadual de Londrina

Prof. Associado C - Departamento de Química

Kelli Esteves Vieira, Universidade Estadual de Londrina

Departamento de Química

Cássia Thaïs Bussamra Vieira Zaia, Universidade Estadual de Londrina

Departamento de Ciências Fisiológicas

Dimas Augusto Morozin Zaia, Universidade Estadual de Londrina

Prof. Associado C - Departamento de Química

Published

2010-07-15

How to Cite

de Santana, H., Vieira, K. E., Zaia, C. T. B. V., & Zaia, D. A. M. (2010). Study of the reaction between ammonium thiocyanate and Fe (II) or Fe (III) using infrared spectroscopy: an experiment of prebiotic chemistry. Semina: Ciências Exatas E Tecnológicas, 31(1), 15–21. https://doi.org/10.5433/1679-0375.2010v31n1p15

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