Heteropoly acids (HPA) have been immobilised inside the channels of Si-MCM-41 mesoporous molecular sieve by means of chemical bonding with amine groups introduced into the system during a previous aminosilylation procedure, which resulted in the strong anchoring of heteropoly anions and prevented the HPA leaching when applied as a catalyst in polar solvent media.
Immobilisation of heteropoly anions in Si-MCM-41 channels by means of chemical bonding to aminosilane groups
W. Kaleta and K. Nowińska, Chem. Commun., 2001, 535 DOI: 10.1039/B007111K
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