J. CRUZ-CASTAÑEDA1, 2, A. L. MELÉNDEZ-LÓPEZ1, 2, S. RAMOS-BERNAL1
AND A. NEGRÓN-MENDOZA1*
1Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, UNAM. Cd. Universitaria, A. P. 70-543, 04510 México, D. F. México
2 Programa de Maestría y Doctorado en Ciencias Químicas, UNAM. Cd. Universitaria, A. P. 70-543, 04510 México, D. F. México
* Email: negron@nucleares.unam.mx
Abstract The stability and reactivity of organic molecules with biological and pre-biological significance in primitive conditions are of paramount importance in chemical evolution studies. Sugars are an essential component in biological systems for the different roles that they play in living beings. The objective of the present work is to study the gamma radiolysis of aqueous solutions of glycolaldehyde, the simplest sugar and aqueous suspensions of glycolaldehydeNa+ -montmorillonite and glycolaldehyde-Fe3+Montmorillonite. Our results indicate that the radiolysis of the aqueous solutions of glycolaldehyde (0.03M), oxygen free, mainly produce the linear dimer known as eritriol (122 g/mol) and a sugar-like compound with six carbon atoms (180 g/mol). The experiments with the clay suspensions show that clays can adsorb glycolaldehyde and protect it from gamma irradiation. Additionally, it was observed that depending on the cation present in the clay, the percentage and the product (monomer or cyclic dimer) adsorption was different. In the case of Fe3+ Montmorillonite, this clay catalyzed the decomposition of glycolaldehyde, forming small amounts nonidentified products. The analysis of these systems was performed by ATRFTIR, UV spectroscopy, liquid chromatography (UHPLC-UV), and HPLC coupled to a mass spectrometry.
DOI: https://doi.org/10.15415/jnp.2017.51013
LINK: http://dspace.chitkara.edu.in/jspui/bitstream/1/873/1/51013_JNP_Negrón-Mendoza.pdf
1Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, UNAM. Cd. Universitaria, A. P. 70-543, 04510 México, D. F. México
2 Programa de Maestría y Doctorado en Ciencias Químicas, UNAM. Cd. Universitaria, A. P. 70-543, 04510 México, D. F. México
* Email: negron@nucleares.unam.mx
Abstract The stability and reactivity of organic molecules with biological and pre-biological significance in primitive conditions are of paramount importance in chemical evolution studies. Sugars are an essential component in biological systems for the different roles that they play in living beings. The objective of the present work is to study the gamma radiolysis of aqueous solutions of glycolaldehyde, the simplest sugar and aqueous suspensions of glycolaldehydeNa+ -montmorillonite and glycolaldehyde-Fe3+Montmorillonite. Our results indicate that the radiolysis of the aqueous solutions of glycolaldehyde (0.03M), oxygen free, mainly produce the linear dimer known as eritriol (122 g/mol) and a sugar-like compound with six carbon atoms (180 g/mol). The experiments with the clay suspensions show that clays can adsorb glycolaldehyde and protect it from gamma irradiation. Additionally, it was observed that depending on the cation present in the clay, the percentage and the product (monomer or cyclic dimer) adsorption was different. In the case of Fe3+ Montmorillonite, this clay catalyzed the decomposition of glycolaldehyde, forming small amounts nonidentified products. The analysis of these systems was performed by ATRFTIR, UV spectroscopy, liquid chromatography (UHPLC-UV), and HPLC coupled to a mass spectrometry.
DOI: https://doi.org/10.15415/jnp.2017.51013
LINK: http://dspace.chitkara.edu.in/jspui/bitstream/1/873/1/51013_JNP_Negrón-Mendoza.pdf
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