CHARACTERIZATION, BY HIGH RESOLUTION MALDI/FTICR MASS SPECTROMETRY, OF TARA (Caesalpinia Spinosa) HYDROLYSABLE TANNINS

  • Juan Z. Dávalos Autor
  • Violeta L. Romero Autor
  • Juan I. Sánchez Autor
  • Ana Valderrama-Negrón Autor
DOI: https://doi.org/10.37761/rsqp.v83i1.107
Keywords: Caesalpinia spinosa, commercial tara powder, hydrolysable tannins, MALDI/ FT-ICR, DFT/M05-2X theory, polygalloyquinic acids, gallic depsides

Abstract

We have studied and characterized the structure of hydrolysable tannins of commercial powder tara, performed by means ultra-high-resolution mass spectrometry (MALDI/FT-ICR) without using separation techniques. Our experimental results, supported by computational calculations at DFT/ M05-2X level of theory, show that the identified species are basically oligomeric structures of polygalloyquinic acids, of the (C7H4O4)n(C7H12O6) type, composed by a chain of polygallic esters (depside) linked, via ester bond, to one quinic acid.

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Author Biographies

Juan Z. Dávalos, Autor

Institute of Chemistry-Physics "Rocasolano", CSIC, Serrano 119, 28006, Madrid, Spain.

Violeta L. Romero, Autor

Faculty of Industrial and Systems Engineering, Universidad Nacional Federico Villarreal, Av. Colonial 450,
Lima 01, Peru.

Juan I. Sánchez, Autor

Faculty of Chemical Engineering, National University of Engineering, Av. Túpac Amaru s / n, Lima 01, Peru.

Ana Valderrama-Negrón, Autor

Faculty of Science, National University of Engineering, Av. Túpac Amaru s / n, Lima 01, Peru.

Published
2017-03-31
Issue
Vol. 83 No. 1 (2017): Journal of Sociedad Química del Perú
Section
Artículos

Copyright (c) 2017 Sociedad Química del Perú

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