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Spin diffusion transfer difference (SDTD) NMR : An advanced method for the characterisation of water structuration within particle networks

Gabrielli, Valeria ; Kuraite, Agne ; da Silva, Marcelo Alves ; Edler, Karen J. LU orcid ; Angulo, Jesús ; Nepravishta, Ridvan ; Muñoz–García, Juan C. and Khimyak, Yaroslav Z. (2021) In Journal of Colloid and Interface Science 594. p.217-227
Abstract

Hypothesis: The classical STD NMR protocol to monitor solvent interactions in gels is strongly dependent on gelator and solvent concentrations and does not report on the degree of structuration of the solvent at the particle/solvent interface. We hypothesised that, for suspensions of large gelator particles, solvent structuration could be characterised by STD NMR when taking into account the particle-to-solvent 1H–1H spin diffusion transfer using the 1D diffusion equation.

Experiments: We have carried out a systematic study on effect of gelator and solvent concentrations, and gelator surface charge, affecting the behaviour of the classical STD NMR build-up curves. To do so, we have characterised solvent... (More)

Hypothesis: The classical STD NMR protocol to monitor solvent interactions in gels is strongly dependent on gelator and solvent concentrations and does not report on the degree of structuration of the solvent at the particle/solvent interface. We hypothesised that, for suspensions of large gelator particles, solvent structuration could be characterised by STD NMR when taking into account the particle-to-solvent 1H–1H spin diffusion transfer using the 1D diffusion equation.

Experiments: We have carried out a systematic study on effect of gelator and solvent concentrations, and gelator surface charge, affecting the behaviour of the classical STD NMR build-up curves. To do so, we have characterised solvent interactions in dispersions of starch and cellulose-like particles prepared in deuterated water and alcohol/D2O mixtures.

Findings: The Spin Diffusion Transfer Difference (SDTD) NMR protocol is independent of the gelator and solvent concentrations, hence allowing the estimation of the degree of solvent structuration within different particle networks. In addition, the simulation of SDTD build-up curves using the general one–dimensional diffusion equation allows the determination of minimum distances (r) and spin diffusion rates (D) at the particle/solvent interface. This novel NMR protocol can be readily extended to characterise the solvent(s) organisation in any type of colloidal systems constituted by large particles.

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author
; ; ; ; ; ; and
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Hydrogel, Saturation transfer difference NMR, Solvation properties, Spin diffusion
in
Journal of Colloid and Interface Science
volume
594
pages
11 pages
publisher
Academic Press
external identifiers
  • pmid:33756365
  • scopus:85102862121
ISSN
0021-9797
DOI
10.1016/j.jcis.2021.02.094
language
English
LU publication?
no
additional info
Publisher Copyright: © 2021
id
5b9bfbb9-46b6-415b-9fee-d0e74cbfe074
date added to LUP
2022-07-12 15:40:10
date last changed
2025-06-11 22:41:55
@article{5b9bfbb9-46b6-415b-9fee-d0e74cbfe074,
  abstract     = {{<p>Hypothesis: The classical STD NMR protocol to monitor solvent interactions in gels is strongly dependent on gelator and solvent concentrations and does not report on the degree of structuration of the solvent at the particle/solvent interface. We hypothesised that, for suspensions of large gelator particles, solvent structuration could be characterised by STD NMR when taking into account the particle-to-solvent <sup>1</sup>H–<sup>1</sup>H spin diffusion transfer using the 1D diffusion equation. <br/></p><p>Experiments: We have carried out a systematic study on effect of gelator and solvent concentrations, and gelator surface charge, affecting the behaviour of the classical STD NMR build-up curves. To do so, we have characterised solvent interactions in dispersions of starch and cellulose-like particles prepared in deuterated water and alcohol/D<sub>2</sub>O mixtures. <br/></p><p>Findings: The Spin Diffusion Transfer Difference (SDTD) NMR protocol is independent of the gelator and solvent concentrations, hence allowing the estimation of the degree of solvent structuration within different particle networks. In addition, the simulation of SDTD build-up curves using the general one–dimensional diffusion equation allows the determination of minimum distances (r) and spin diffusion rates (D) at the particle/solvent interface. This novel NMR protocol can be readily extended to characterise the solvent(s) organisation in any type of colloidal systems constituted by large particles.</p>}},
  author       = {{Gabrielli, Valeria and Kuraite, Agne and da Silva, Marcelo Alves and Edler, Karen J. and Angulo, Jesús and Nepravishta, Ridvan and Muñoz–García, Juan C. and Khimyak, Yaroslav Z.}},
  issn         = {{0021-9797}},
  keywords     = {{Hydrogel; Saturation transfer difference NMR; Solvation properties; Spin diffusion}},
  language     = {{eng}},
  month        = {{07}},
  pages        = {{217--227}},
  publisher    = {{Academic Press}},
  series       = {{Journal of Colloid and Interface Science}},
  title        = {{Spin diffusion transfer difference (SDTD) NMR : An advanced method for the characterisation of water structuration within particle networks}},
  url          = {{http://dx.doi.org/10.1016/j.jcis.2021.02.094}},
  doi          = {{10.1016/j.jcis.2021.02.094}},
  volume       = {{594}},
  year         = {{2021}},
}