article published yes Yanjing Zhao author Christian Weinberger author 11848 Michael Tiemann author 235470000-0003-1711-2722 Claudia Schmidt author 4660000-0003-3179-9997 35 department 2 department 307 department The influence of the hydrophilicity of mesoporous silica on wetting with water was investigated by comparing a standard hydrophilic MCM-41 and a partially hydrophobicized material obtained by trimethylsilylation of MCM-41. The materials were characterized using X-ray diffraction, N2 physisorption, thermogravimetric analysis, infrared spectroscopy, as well as 29Si and 13C solid-state nuclear magnetic resonance spectroscopy. Trimethylsilylation leads to a reduction of the pore diameter (determined using density functional theory) from 3.8 to 3.6 nm. Using proton solid-state nuclear magnetic resonance (NMR) under magic-angle spinning, it was found that the filling of these narrow pores with increasing amounts of water follows an axial mode, independent of surface hydrophilicity. The axial model of pore-filling is supported by the coexistence of two characteristic 1H NMR water signals, one from physisorbed water molecules, which can exchange protons with silanol groups, and one from bulk-like water in completely filled pores, where water molecules are in exchange between sites at the pore wall and sites closer to the center of the pore. Wiley2026 eng 2629-2742 2629-274210.1002/anse.70109 65 Zhao, Y., Weinberger, C., Tiemann, M., &#38; Schmidt, C. (2026). NMR Investigation of Water in Mesoporous Silica Materials With Different Surfaces. <i>Analysis &#38; Sensing</i>, <i>6</i>(5), Article e70109. <a href="https://doi.org/10.1002/anse.70109">https://doi.org/10.1002/anse.70109</a> Y. Zhao, C. Weinberger, M. Tiemann, and C. Schmidt, “NMR Investigation of Water in Mesoporous Silica Materials With Different Surfaces,” <i>Analysis &#38; Sensing</i>, vol. 6, no. 5, Art. no. e70109, 2026, doi: <a href="https://doi.org/10.1002/anse.70109">10.1002/anse.70109</a>. Zhao, Yanjing, Christian Weinberger, Michael Tiemann, and Claudia Schmidt. “NMR Investigation of Water in Mesoporous Silica Materials With Different Surfaces.” <i>Analysis &#38; Sensing</i> 6, no. 5 (2026). <a href="https://doi.org/10.1002/anse.70109">https://doi.org/10.1002/anse.70109</a>. Y. Zhao, C. Weinberger, M. Tiemann, C. Schmidt, Analysis &#38; Sensing 6 (2026). Zhao, Yanjing, et al. “NMR Investigation of Water in Mesoporous Silica Materials With Different Surfaces.” <i>Analysis &#38; Sensing</i>, vol. 6, no. 5, e70109, Wiley, 2026, doi:<a href="https://doi.org/10.1002/anse.70109">10.1002/anse.70109</a>. Zhao Y, Weinberger C, Tiemann M, Schmidt C. NMR Investigation of Water in Mesoporous Silica Materials With Different Surfaces. <i>Analysis &#38; Sensing</i>. 2026;6(5). doi:<a href="https://doi.org/10.1002/anse.70109">10.1002/anse.70109</a> @article{Zhao_Weinberger_Tiemann_Schmidt_2026, title={NMR Investigation of Water in Mesoporous Silica Materials With Different Surfaces}, volume={6}, DOI={<a href="https://doi.org/10.1002/anse.70109">10.1002/anse.70109</a>}, number={5e70109}, journal={Analysis &#38; Sensing}, publisher={Wiley}, author={Zhao, Yanjing and Weinberger, Christian and Tiemann, Michael and Schmidt, Claudia}, year={2026} } 673252026-10-01T14:13:13Z2026-10-01T14:17:52Z