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Open AccessArticle

Enhanced Resolution Analysis for Water Molecules in MCM-41 and SBA-15 in Low-Field T2 Relaxometric Spectra

Department of Fossil Fuels, AGH University of Science and Technology, A. Mickiewicza Av., 30-059 Cracow, Poland
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Academic Editor: Igor Serša
Molecules 2021, 26(8), 2133; https://doi.org/10.3390/molecules26082133
Received: 1 March 2021 / Revised: 28 March 2021 / Accepted: 6 April 2021 / Published: 8 April 2021
(This article belongs to the Special Issue Advances in NMR and MRI of Materials)
Mesoporous silica materials are the subjects for relaxometric NMR studies in which we obtain information on the properties of molecules in confined geometries. The signal analysis in such investigations is generally carried out with the help of the Inverse Laplace Transform (ILT), which is accompanied by a regularization procedure. The appropriate selection of the regularization method may positively affect the resolution of the spectrum and the essence of the final conclusions. In this work, we examined the MCM-41 and SBA-15 model systems in various saturation states, using L-Curve regularization for relaxation spectra based on our own version of the fast fast ILT implementation. In a single relaxometric spectrum, the water contributions from the internal volume in the pores and between the silica particles were identified, which allowed us to trace the dynamics of the corresponding drying trends during the removal of water from the sample as a function of total water saturation. View Full-Text
Keywords: low field NMR; Inverse Laplace Transform; L-Curve regularization; confined liquid; relaxometry; drying process low field NMR; Inverse Laplace Transform; L-Curve regularization; confined liquid; relaxometry; drying process
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MDPI and ACS Style

Stoch, G.; Krzyżak, A.T. Enhanced Resolution Analysis for Water Molecules in MCM-41 and SBA-15 in Low-Field T2 Relaxometric Spectra. Molecules 2021, 26, 2133. https://doi.org/10.3390/molecules26082133

AMA Style

Stoch G, Krzyżak AT. Enhanced Resolution Analysis for Water Molecules in MCM-41 and SBA-15 in Low-Field T2 Relaxometric Spectra. Molecules. 2021; 26(8):2133. https://doi.org/10.3390/molecules26082133

Chicago/Turabian Style

Stoch, Grzegorz; Krzyżak, Artur T. 2021. "Enhanced Resolution Analysis for Water Molecules in MCM-41 and SBA-15 in Low-Field T2 Relaxometric Spectra" Molecules 26, no. 8: 2133. https://doi.org/10.3390/molecules26082133

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