13 C and 27 Al NMR study of complexation between aluminium ion and simple dicarboxylic acids under an acidic condition: New peak assignments of 27 AL NMR spectra of mixed solutions of AL 3+ and simple dicarboxylic acids

Mayumi Etou, Tsutomu Kurisaki, Yoshihiro Okaue, Hisanobu Wakita, Takushi Yokoyama

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Due to a consideration of Al detoxicification by simple carboxylic acid, the interaction between aluminium ion (Al 3+ ) and three dicarboxylic acids (oxalic acid (OX), malonic acid (MA) and succinic acid (SU)) under an acidic condition was investigated using 13 C and 27 Al NMR techniques. Based on deconvolution of the 27 Al NMR spectra and quantitative 13 C NMR spectra, the structure of each complex was elucidated. Especially, we focused on the peak assignments of 27 Al NMR spectra by combining of the results of quantitative 13 C NMR spectra. In the OX system, the peak at 16 ppm in the 27 Al NMR spectrum originates from Al(OX) 3 3- and Al(OX) 2 - , and the ratio of each complex depends on the OX/Al molar ratio. In the MA system, the three complexes (Al(MA) 2 - , Al(MA) 3 3- and Al(MA) + ) are represented in the peak at 2 ppm in the 27 Al NMR spectrum. The assignment of peaks in the 27 Al NMR spectra in this study differs from those described in previous papers.

Original languageEnglish
Pages (from-to)843-848
Number of pages6
Journalanalytical sciences
Volume29
Issue number8
DOIs
Publication statusPublished - 2013

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry

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