Quantification of the Number of Silanol Groups in Silicalite and Mesoporous MCM-41: Use of Ft-Raman Spectroscopy

Autor:	Patrick J. Barrie, Lynn F. Gladden, Sunil Ashtekar, Jeremy J. Hastings
Rok vydání:	2000
Předmět:	Infrared Inorganic chemistry Atomic and Molecular Physics and Optics Analytical Chemistry chemistry.chemical_compound Silanol Adsorption MCM-41 chemistry Pyridine Polymer chemistry Molecule Porosity Mesoporous material Spectroscopy
Zdroj:	Spectroscopy Letters. 33:569-584
ISSN:	1532-2289 0038-7010
Popis:	Infrared and FT-Raman spectra have been obtained on pyridine adsorbed within two siliceous materials, silicalite and MCM-41. Both spectroscopic techniques detect the presence of weak physisorbed pyridine and stronger hydrogen-bonded pyridine. In particular, the FT-Raman spectra are well resolved and can be used to measure the number of pyridine molecules that interact with hydroxyl groups. for silicalite, it is found that an average of one pyridine molecule per unit cell interacts with hydroxyl groups. the number of hydroxyl groups present at the surface of porous silica materials can also be obtained using this approach. for siliceous MCM-41, it is found that the hydroxyl group concentration is about 3 mmol/g of dry solid.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ef9e4460fc3b3c8dd148ed5f45870c51 https://doi.org/10.1080/00387010009350140 Zobrazit plný text záznamu