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Issue 15, 2011
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Functionalization of MCM-41 and SBA-1 with titanium(IV) (silyl)amides

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The surface organometallic chemistry (SOMC) of Ti(NMe2)4 and Ti(NMe2)3[N(SiHMe2)2] on periodic mesoporous silica (PMS) materials MCM-41 and SBA-1 was examined. While the smaller titanium amide gave the highest titanium loadings (e.g., Ti(NMe2)4@MCM-41: 12.1 wt%), a ligand-promoted silylation reaction competes effectively with Ti–N bond protonolysis for the tailor-made complex Ti(NMe2)3[N(SiHMe2)2]. Pre-functionalized materials SiMePh2@PMS and [Mg{N(SiHMe2)2}2]2@SBA-1 were employed for further control of the titanium load. Amido ligand exchange with R-(+)-1,1′-bi-2-naphthol (R-H2BINOL) was observed only on channel-like material Ti(NMe2)4@MCM-41, whereas size-selective grafting seems to be prominent on cage-like Ti(NMe2)4@SBA-1. All materials were characterized by DRIFT spectroscopy, nitrogen physisorption and elemental analysis.

Graphical abstract: Functionalization of MCM-41 and SBA-1 with titanium(iv) (silyl)amides

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The article was received on 15 Dec 2010, accepted on 04 Feb 2011 and first published on 01 Mar 2011

Article type: Paper
DOI: 10.1039/C0JM04382F
Citation: J. Mater. Chem., 2011,21, 5620-5628
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    Functionalization of MCM-41 and SBA-1 with titanium(IV) (silyl)amides

    T. Deschner, B. Lønstad, M. Widenmeyer and R. Anwander, J. Mater. Chem., 2011, 21, 5620
    DOI: 10.1039/C0JM04382F

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