Jump to main content
Jump to site search

Issue 16, 2017
Previous Article Next Article

The elusive silica/water interface: isolated silanols under water as revealed by vibrational sum frequency spectroscopy

Author affiliations

Abstract

It has been long recognized that the surface chemistry of silica, and in particular the type and relative amount of surface bound silanol groups, plays a critical role in many of the properties associated with the material, where a typical example is the discrepant adsorption behavior observed depending on the pretreatment history of the surface. However, in spite of its importance, the direct probing of specific surface silanol groups under water has been hampered by instrumental limitations. Here we make use of vibrational sum frequency spectroscopy (VSFS) to first, identify under water the OH stretch of isolated surface silanols, and second, explore its acid/base behavior and dependence on the surface pretreatment method. The properties of other types of silanol groups (i.e. hydrogen bonded/geminal) are also inferred from the data. The ability to directly probe these functional groups under water represents a crucial step to further improving our understanding of this widely used mineral oxide.

Graphical abstract: The elusive silica/water interface: isolated silanols under water as revealed by vibrational sum frequency spectroscopy

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 08 Mar 2017, accepted on 24 Mar 2017 and first published on 24 Mar 2017


Article type: Paper
DOI: 10.1039/C7CP01507K
Citation: Phys. Chem. Chem. Phys., 2017,19, 10343-10349
  • Open access: Creative Commons BY license
  •   Request permissions

    The elusive silica/water interface: isolated silanols under water as revealed by vibrational sum frequency spectroscopy

    L. Dalstein, E. Potapova and E. Tyrode, Phys. Chem. Chem. Phys., 2017, 19, 10343
    DOI: 10.1039/C7CP01507K

    This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material.

    Reproduced material should be attributed as follows:

    • For reproduction of material from NJC:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
    • For reproduction of material from PCCP:
      [Original citation] - Published by the PCCP Owner Societies.
    • For reproduction of material from PPS:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
    • For reproduction of material from all other RSC journals:
      [Original citation] - Published by The Royal Society of Chemistry.

    Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Search articles by author