Cited by 303Advanced NMR Techniques and ApplicationsNMR spectroscopy and applicationsMesoporous Materials and Catalysis

The Fumed Silica Surface: A Study by NMR

Liu, Changhua C., Maciel, Gary E.·1996·Journal of the American Chemical Society

Abstract

High-resolution solid-state NMR techniques were used to investigate the surface structure of Cab-O-Sil fumed silica. 1 H NMR results obtained from CRAMPS, MAS-only and relaxation studies reveal the existence of both hydrogen-bonded silanols and isolated silanols on the Cab-O-Sil surface. A systematic dehydration study of fumed silica was carried out, with results on the quantity of each type of silanol on the surface at various dehydration stages. 29 Si CP-MAS experiments, including CP spin dynamics studies and various other relaxation studies, were employed to probe hydrogen bonding and the local structural environments of various hydroxyl groups of silica surfaces. 29 Si CP-MAS experiments on water-treated and deuterium-exchanged Cab-O-Sil indicate the existence of interparticle silanols and internal silanols in fumed silica. 1 H and 29 Si NMR show that for fumed silica both isolated and hydrogen-bonded silanols are present on the surface of an untreated sample, in contrast to the case of silica gel, where all silanols of an untreated sample are hydrogen bonded.

Integrity signals

Registry

Crossref · 10.1021/ja954120w

Cites

69 of 69 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Cites

Flagged first, then by citations

Research works printed but not linked: 24

  1. Lygin V. I., 1988, Russ. J. Phys. Chem., 62, 1084
  2. Pavlov V., 1975, Teor. Eksp. Khim., 11, 415
  3. Davydov V. Y., 1963, Russ. J. Phys. Chem., 37, 1404
  4. Davydov V. Y., 1964, Russ. J. Phys. Chem., 38, 1108
  5. Davydov V. Y., 1974, Russian J. Phys. Chem., 48, 1342
  6. Lippmaa A. E. T., 1981, Dokl. Phys. Chem., 259, 639
  7. Nandi A. K., 1992, Indian J. Phys., 66, 281
  8. Chuiko A. A., 1990, Dokl. Akad. Nauk SSSR, 315, 152
  9. Gorlov Y. I., 1984, Teor. Eksp. Khim., 20, 754
  10. Gorlov Y. I., 1980, Teor. Eksp. Khim., 16, 405
  11. Gorlov Y. I., 1980, Teor. Eksp. Khim., 16, 333
  12. Gorlov Y. I., 1980, Teor. Eksp. Khim., 16, 202
  13. Gorlov Y. I., 1979, Teor. Eksp. Khim., 15, 446
  14. Parfitt, G. D.; Sing, K. S. W.CharacterizationofPowderSurfaces; Academic Press:  New York, 1976; p 403.
  15. Gay J. D., 1984, J. Magn. Reson., 58, 413
  16. Liu, C. C. Solid-State1H and29Si NMR Studies on Cab-O-Sil Silicas Ph.D. Dissertation, Colorado State University, 1995.
  17. Liu C. C., 1996, Anal. Chem., 68, 1407
  18. Zhdanov S. P., 1957, Zh. Fiz. Khim., 31, 2213
  19. Morrow B. A., 1991, J. Langmuir, 7, 1695, 10.1021/la00056a022 · DOI
  20. Mehring, M.NMR,BasicPrinciplesandProgress; Springer Verlag:  Berlin Heidelberg, New York, 1976; p 138.
  21. Slichter, C. P.PrinciplesofMagneticReconance, 3rd ed.; Springer-Verlag:  New York, 1989; p 79.
  22. Parfitt, G. D.; Sing, K. S. W.CharacterizationofPowderSurfacesAcademic Press:  London, New York, San Francisco, 1976; pp 353−420.
  23. Brunner E., 1990, J. Magn. Reson., 90, 90
  24. Wells, F. A.StructuralInorganicChemistry5th ed.; Claredon Press:  Oxford, UK, 1984; p 1000.

Cited by

Sorted by citations

Authors
Liu, C. C., & Maciel, G. E.
Affiliations
Colorado State University (US)
Venue
Journal of the American Chemical Society
Published
1996-01-01
Volume
118
Issue
21
Pages
5103-5119
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W2021813021
Cited by
303
References
69
Citations by year
2026: 6 · 2025: 9 · 2024: 13 · 2023: 13 · 2022: 17 · 2021: 20 · 2020: 9 · 2019: 10 · 2018: 8 · 2017: 9 · 2016: 17 · 2015: 8 · 2014: 8 · 2013: 15 · 2012: 16
FWCI
3.89
Type
journal article
Language
en
Open access
closed
Locations
Journal of the American Chemical Society (publishedVersion)
Topics
  • Physical Sciences › Chemistry › Spectroscopy › Advanced NMR Techniques and Applications
  • Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › NMR spectroscopy and applications
  • Physical Sciences › Materials Science › Materials Chemistry › Mesoporous Materials and Catalysis
Keywords
fumed silica, Cab-O-Sil, silanols, hydrogen bonding, dehydration, silica gel, 1H NMR, spin dynamics, hydroxyl groups

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review