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Issue 2, 2011
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New mesostructured organosilica with chiral sugar derived structures: nice host for gold nanoparticles stabilisation

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Abstract

In this paper we describe the synthesis of functionalised mesoporous organosilicas containing a mannitol derivative in the framework. For this purpose, a bis-silylated precursor 3,4-Di-O-[3-(triethoxysilylpropyl)carbamate]-1,2:5,6-di-O-isopropylidene-D-mannitol was prepared by coupling of 1,2:5,6-di-O-isopropylidene-D-mannitol with 3-(triethoxysilylpropyl)isocyanate. The framework-functionalised materials were obtained in one step by the “direct synthesis” method which consists of a co-hydrolysis and polycondensation of a bis-silylated mannitol precursor with tetraethylorthosilicate (TEOS) in the presence of a non-ionic triblock co-polymer (P123) as structure-directing agent. Interestingly, deprotection of the 1,2,5,6 OH functional groups occurred during the material synthesis. The obtained solids were characterized by 13C and 29Si CP-MAS NMR, N2adsorption-desorption, powder X-ray diffraction, TEM and elemental analysis. We have shown that, the OH functional groups, which are released during the synthesis of the mesoporous silica, can be used for chelation of ions and stabilisation of nanoparticles. The subsequent growth of gold (0) nanoparticles in the wall has been investigated and evidenced.

Graphical abstract: New mesostructured organosilica with chiral sugar derived structures: nice host for gold nanoparticles stabilisation

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Publication details

The article was received on 03 Sep 2010, accepted on 14 Oct 2010 and first published on 25 Nov 2010


Article type: Paper
DOI: 10.1039/C0DT01162B
Citation: Dalton Trans., 2011,40, 446-451
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    New mesostructured organosilica with chiral sugar derived structures: nice host for gold nanoparticles stabilisation

    D. Hérault, G. Cerveau, R. J. P. Corriu and A. Mehdi, Dalton Trans., 2011, 40, 446
    DOI: 10.1039/C0DT01162B

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