English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
Add to Basket
  DetailsSummary

Released
Journal Article

Comparative study of the strongest solid Lewis acids known: ACF and HS-AlF3

MPS-Authors
/persons/resource/persons21766

Kröhnert,  Jutta
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons22181

Trunschke,  Annette
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Calvo, B., Marshall, C. P., Krahl, T., Kröhnert, J., Trunschke, A., Scholz, G., et al. (2018). Comparative study of the strongest solid Lewis acids known: ACF and HS-AlF3. Dalton Transactions. doi:10.1039/C8DT03279C.


Cite as: https://hdl.handle.net/21.11116/0000-0002-8083-8
Abstract
Aluminium chlorofluoride (ACF) and high-surface aluminium fluoride (HS-AlF3) were analyzed by a set of characterization methods to assess their acidic properties: NH3-TPD, CO adsorption followed by DRIFTS, CD3CN-PAS-FTIR and MAS NMR spectroscopy after 15N-pyridine adsorption. Both catalysts contain very strong and medium-strong Lewis acid sites as confirmed by CO adsorption, in which small differences arise from the morphological properties of each catalyst, with ACF being microporous and HS-AlF3 mesoporous. Shifts of the CO vibration band of up to 77 cm−1 were observed, which account for very strong Lewis acid sites. In addition, very strong Lewis acid sites could be identified by CD3CN-PAS for both catalysts, exhibiting a shift of 95 cm−1 from free nitrile, the highest ever reported for a solid Lewis acid.