Comparison of through-space homonuclear correlations between quadrupolar nuclei in solids

Gómez, Jennifer S.; Trébosc, Julien; Duong, Nghia Tuan; Pourpoint, Frédérique; Lafon, Olivier; Amoureux, Jean‐Paul

doi:10.1016/j.jmr.2023.107388

Cited by 2 publications

(2 citation statements)

References 37 publications

(62 reference statements)

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“…This method applied to boron gives information on the presence of BO 3 in close vicinity to either BO 3 or BO 4 , and then on the possibility to have boron in the direct surrounding of a tetrahedral boron. From the SQ–DQ, the projection of the spectra (see Figure S3) on the direct dimension allows us to identify some BO 4 species present in the sample 90,96 . Indeed, on this projection, the peak centered near 0 ppm corresponds to the tetrahedral boron and can be fitted with Gaussian lines, which will reveal the position of each BO 4 environment (i.e., BO 4 [1B,3Si], BO 4 [2B,2Si]) but not the BO 4 (0B,4Si) as no boron‐to‐boron interaction is taking place in this case.…”

Section: Resultsmentioning

confidence: 99%

“…From the SQ-DQ, the projection of the spectra (see Figure S3) on the direct dimension allows us to identify some BO 4 species present in the sample. 90,96 Indeed, on this projection, the peak centered near 0 ppm corresponds to the tetrahedral boron and can be fitted with Gaussian lines, which will reveal the position of each BO 4 environment (i.e., BO 4 [1B,3Si], BO 4 [2B,2Si]) but not the BO 4 (0B,4Si) as no boron-to-boron interaction is taking place in this case. The SQ-DQ spectra for our samples and their projections used to prepare the following fit are available in Figures S3 and S4.…”

Section: Network Cation Local Environment Characterization Using Nmr ...mentioning

confidence: 99%

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The effect of iodine on the local environment of network‐forming elements in aluminoborosilicate glasses: An NMR study

Soudani,

Paris,

Morizet

2024

J Am Ceram Soc.

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Knowledge of the structural organization of nuclear waste glasses at the atomic scale is the basis for further studies of macroscopic properties (e.g., fracture toughness, chemical durability, and leaching rate). Recent studies have focused on the iodine dissolution mechanism in oxide‐based glasses synthesized under high‐pressure conditions, but there is still a lack of key information on the extent of the modifications caused by iodine entering the glass network. We therefore decided to conduct an in‐depth study by nuclear magnetic resonance on two series of aluminoborosilicate glasses synthetized under high pressure conditions and doped with either I2 or I2O5. The obtained 11B, 23Na, and 27Al nuclear magnetic resonance (NMR) spectra were fitted and correlated with the iodine content in order to find possible relationships with the local environment change for the probed cations. These data showed that iodine has no effect on the coordination of aluminum and very little effects on that of boron. In contrast, we found an expected relationship of the I content with the 23Na NMR parameters. In comparison with previous studies on the non‐bridging oxygen (NBO) distribution in aluminoborosilicate, we suggest that Na+ is mainly scavenged from silica tetrahedra with one or two NBO ( or ) as no boron planar triangles with one NBO are expected for such compositions. From those information, we establish a model for iodine dissolution in nuclear waste glass that is consistent with previous studies.

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Section: Resultsmentioning

confidence: 99%

Section: Network Cation Local Environment Characterization Using Nmr ...mentioning

confidence: 99%

The effect of iodine on the local environment of network‐forming elements in aluminoborosilicate glasses: An NMR study

Soudani,

Paris,

Morizet

2024

J Am Ceram Soc.

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show abstract

Influence of high-pressure on the short-range structure of Ca or Na aluminoborosilicate glasses from 11B and 27Al solid-state NMR

Soudani,

Paris,

Morizet

2024

Journal of Non-Crystalline Solids

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Comparison of through-space homonuclear correlations between quadrupolar nuclei in solids

Cited by 2 publications

References 37 publications

The effect of iodine on the local environment of network‐forming elements in aluminoborosilicate glasses: An NMR study

The effect of iodine on the local environment of network‐forming elements in aluminoborosilicate glasses: An NMR study

Influence of high-pressure on the short-range structure of Ca or Na aluminoborosilicate glasses from 11B and 27Al solid-state NMR

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