Title :

Probing the aluminum complexation by Siberian riverine organic matter using solid-state DNP-NMR

Author(s) :

Pourpoint, Frederique [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Templier, Joëlle [Auteur]
Anquetil, Christelle [Auteur]
Vezin, Herve [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Trebosc, Julien [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Trivelli, Xavier [Auteur]
Unité de Glycobiologie Structurale et Fonctionnelle (UGSF) - UMR 8576
Unité de Glycobiologie Structurale et Fonctionnelle - UMR 8576 [UGSF]
Chabaux, François [Auteur]
Pokrovsky, Oleg S. [Auteur]
Prokushkin, Anatoly S. [Auteur]
Amoureux, Jean-Paul [Auteur]
Lafon, Olivier [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Derenne, Sylvie [Auteur]

Journal title :

Chemical Geology

Volume number :

452

Pages :

8-Jan

Publication date :

2017-03-05

HAL domain(s) :

Chimie/Chimie inorganique

English abstract : [en]

In a Siberian river, the concentrations of chemical species vary with the hydrological regime. Dissolved Organic Matter (DOM) and aluminum ions show a parallel trend in the course of the hydrological year. However, the ...
Show more >In a Siberian river, the concentrations of chemical species vary with the hydrological regime. Dissolved Organic Matter (DOM) and aluminum ions show a parallel trend in the course of the hydrological year. However, the speciation of aluminum in this natural environment remains an open question. We propose here a combination of spectroscopic techniques to investigate the proximity between the aluminum atoms and DOM. First, one-dimensional (1D) solid-state Nuclear Magnetic Resonance (NMR), Electron Paramagnetic Resonance (EPR) and 1D and 2D solution NMR spectra were acquired, providing a clear overview of the DOM composition. Second, the sensitivity enhancement yielded by Dynamic Nuclear Polarization enabled the NMR detection of proximities between the 27Al and 13C nuclei. Hence, we show that 8.3 ± 1.3% of the carboxylate groups observed by NMR are connected to the Al3 + ions in the DOM sample. We here demonstrate for the first time how advanced solid-state NMR methods can provide key information about the localization of aluminum in such complex natural materials.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

ENSCL
Université de Lille
CNRS
Centrale Lille
Univ. Artois

Collections :

• Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Research team(s) :

RMN et matériaux inorganiques (RM2I)

Submission date :

2019-09-25T14:06:24Z
2021-06-25T07:56:57Z