Publication Type Journal Article
Title Ribose-borate esters as potential components for prebiological evolution
Authors A. Franco José do Rosário Ascenso L. Ilharco H. P. Diogo Vânia André J A L Silva
Groups BioMol BIOIN
Journal JOURNAL OF MOLECULAR STRUCTURE
Year 2019
Month May
Volume 1184
Number
Pages 281-288
Abstract Ribose-borate esters or Borate-Bound Species (BBS) with ribose were studied in aqueous solution by NMR and infrared (ATR) spectroscopies, as well as by DSC, PXRD and infrared spectroscopy (DRIFT) after mixing D-ribose and borate by mechanochemical procedures. NMR titrations of solutions of D-ribose by borate and borate by D-ribose were carried out, followed by H-1 and B-11 NMR analysis, revealing that an excess of D-ribose (relative to borate) leads to the formation of diesters and monoesters; both types of esters are stable under the studied conditions. The occurrence of furanose and the number of chemical bonds to the boron atom were confirmed by infrared spectroscopy. Interaction of Na+ with BBS revealing an ionic character was clarified by Na-23 NMR spectroscopy. The samples obtained by mechanochemical procedures were amorphous, and with excess of borate present, increase their thermal stability at least up to 140 degrees C. These results expand the conditions of BBS as reagents in prebiotic reactions. Additionally, BBS exhibit uncommon chemical characteristics. (C) 2019 Elsevier B.V. All rights reserved.
DOI http://dx.doi.org/10.1016/j.molstruc.2019.02.031
ISBN
Publisher
Book Title
ISSN 0022-2860
EISSN 1872-8014
Conference Name
Bibtex ID ISI:000461047100031
Observations
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