Abstract
We have used 31P NMR (MAS) and IR spectroscopy and also chemical analysis to show that when Si- and Ti,Si-MCM-41 mesoporous molecular sieves are treated with phosphorus oxychloride, surface-anchored silicophosphate and titanophosphate compounds are formed of the type ≡(Si—O) x —{PO(OH)3−x } and ≡(Ti—O) x —{PO(OH)3−x } (x = 1, 2), and also compounds with the structure of titanium hydrophosphate and pyrophosphate.
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Kovalenko, A.S., Koval'chuk, T.V., Zaitsev, V.N. et al. Structural Features of Grafted Phosphates in Mesopores of Si-MCM-41 and Ti,Si-MCM-41 Molecular Sieves. Theoretical and Experimental Chemistry 39, 195–200 (2003). https://doi.org/10.1023/A:1024945426509
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DOI: https://doi.org/10.1023/A:1024945426509