Steinrücken, Elisa ; Wissel, Till ; Brodrecht, Martin ; Breitzke, Hergen ; Regentin, Julia ; Buntkowsky, Gerd ; Vogel, Michael (2021)
²H NMR study on temperature-dependent water dynamics in amino-acid functionalized silica nanopores.
In: The Journal of Chemical Physics, 154 (11)
doi: 10.1063/5.0044141
Article, Bibliographie
This is the latest version of this item.
Abstract
We prepare various amino-acid functionalized silica pores with diameters of ∼6 nm and study the temperature-dependent reorientation dynamics of water in these confinements. Specifically, we link basic Lys, neutral Ala, and acidic Glu to the inner surfaces and combine 2H nuclear magnetic resonance spin–lattice relaxation and line shape analyses to disentangle the rotational motions of the surfaces groups and the crystalline and liquid water fractions coexisting below partial freezing. Unlike the crystalline phase, the liquid phase shows reorientation dynamics, which strongly depends on the chemistry of the inner surfaces. The water reorientation is slowest for the Lys functionalization, followed by Ala and Glu and, finally, the native silica pores. In total, the rotational correlation times of water at the different surfaces vary by about two orders of magnitude, where this span is largely independent of the temperature in the range ∼200–250 K.
| Item Type: | Article |
|---|---|
| Erschienen: | 2021 |
| Creators: | Steinrücken, Elisa ; Wissel, Till ; Brodrecht, Martin ; Breitzke, Hergen ; Regentin, Julia ; Buntkowsky, Gerd ; Vogel, Michael |
| Type of entry: | Bibliographie |
| Title: | ²H NMR study on temperature-dependent water dynamics in amino-acid functionalized silica nanopores |
| Language: | English |
| Date: | 15 March 2021 |
| Publisher: | AIP Publishing |
| Journal or Publication Title: | The Journal of Chemical Physics |
| Volume of the journal: | 154 |
| Issue Number: | 11 |
| DOI: | 10.1063/5.0044141 |
| Corresponding Links: | |
| Abstract: | We prepare various amino-acid functionalized silica pores with diameters of ∼6 nm and study the temperature-dependent reorientation dynamics of water in these confinements. Specifically, we link basic Lys, neutral Ala, and acidic Glu to the inner surfaces and combine 2H nuclear magnetic resonance spin–lattice relaxation and line shape analyses to disentangle the rotational motions of the surfaces groups and the crystalline and liquid water fractions coexisting below partial freezing. Unlike the crystalline phase, the liquid phase shows reorientation dynamics, which strongly depends on the chemistry of the inner surfaces. The water reorientation is slowest for the Lys functionalization, followed by Ala and Glu and, finally, the native silica pores. In total, the rotational correlation times of water at the different surfaces vary by about two orders of magnitude, where this span is largely independent of the temperature in the range ∼200–250 K. |
| Identification Number: | Artikel-ID: 114702 |
| Divisions: | 05 Department of Physics 05 Department of Physics > Institute for Condensed Matter Physics 05 Department of Physics > Institute for Condensed Matter Physics > Molecular dynamics of condensed matter 07 Department of Chemistry 07 Department of Chemistry > Eduard Zintl-Institut 07 Department of Chemistry > Eduard Zintl-Institut > Physical Chemistry |
| Date Deposited: | 09 May 2022 08:58 |
| Last Modified: | 01 Aug 2024 08:29 |
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| Suche nach Titel in: | TUfind oder in Google |
Available Versions of this Item
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²H NMR study on temperature-dependent water dynamics in amino-acid functionalized silica nanopores. (deposited 13 Jul 2023 12:42)
- ²H NMR study on temperature-dependent water dynamics in amino-acid functionalized silica nanopores. (deposited 09 May 2022 08:58) [Currently Displayed]
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