@article{67325,
  abstract     = {{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.}},
  author       = {{Zhao, Yanjing and Weinberger, Christian and Tiemann, Michael and Schmidt, Claudia}},
  issn         = {{2629-2742}},
  journal      = {{Analysis & Sensing}},
  number       = {{5}},
  publisher    = {{Wiley}},
  title        = {{{NMR Investigation of Water in Mesoporous Silica Materials With Different Surfaces}}},
  doi          = {{10.1002/anse.70109}},
  volume       = {{6}},
  year         = {{2026}},
}