Authors
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Vyalikh, A. ; Wang, De-Yi ; Wagenknecht, U. ; Heinrich, G. ; Scheler, U.
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Title
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Molecular dynamics in aluminum layered double hydroxides as studied by 1H T1p NMR measurements
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Date
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07.06.2011
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Number
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27163
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Abstract
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Proton dynamics in pristine and organically-modified layered double hydroxide has been studied by 1H T1?. Inverse Laplace transform with spectral resolution results in a correlation of T1? and chemical shift.<br /><br />In LDH two contributions are resolved. They are assigned to the metal hydroxides, forming the LDH sheets (48 ms), and mobile interlayer water (2 ms). Apparent T1? values of OH-protons in surfactant-modified LDH are different in dodecylbenzenesulfonate- (SDBS) and sodium octasulfonate- (C8) modified LDH. This difference is explained by the presence of water in LDHSDBS. The effects of spin diffusion have been studied by performing 2D 1H RFDR in the LDHSDBS.<br /><br />* Combination of proton relaxation time measurements with chemical shift resolution permits assignment to structural motifs. <br />* Inverse Laplace transform is applied for data analysis. <br />* A significant difference of the mobility between water and OH groups is found. · Mobility varies with the cation distribution.
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Publisher
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Chemical Physics Letters
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Wikidata
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Citation
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Chemical Physics Letters 509 (2011) 138-142
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DOI
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https://doi.org/10.1016/j.cplett.2011.04.078
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Tags
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