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Issue 32, 2013
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Confinement of a bioinspired nonheme Fe(II) complex in 2D hexagonal mesoporous silica with metal site isolation

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Abstract

A mixed amine pyridine polydentate FeII complex was covalently tethered in hexagonal mesoporous silica of the MCM-41 type. Metal site isolation was generated using adsorbed tetramethylammonium cations acting as a patterned silanol protecting mask and trimethylsilylazane as a capping agent. Then, the amine/pyridine ligand bearing a tethering triethoxysilane group was either grafted to such a pretreated silica surface prior to or after complexation to FeII. These two synthetic routes, denoted as two-step and one-step, respectively, were also applied to fumed silica for comparison, except that the silanol groups were capped after tethering the metal unit. The coordination of the targeted complex was monitored using UV-visible spectrophotometry and, according to XPS, the best control was achieved inside the channels of the mesoporous silica for the two-step route. For the solid prepared according to the one-step route, tethering of the complex occurred mainly at the entrance of the channel.

Graphical abstract: Confinement of a bioinspired nonheme Fe(ii) complex in 2D hexagonal mesoporous silica with metal site isolation

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Publication details

The article was received on 04 Mar 2013, accepted on 11 Jun 2013 and first published on 03 Jul 2013


Article type: Paper
DOI: 10.1039/C3DT50590A
Citation: Dalton Trans., 2013,42, 11607-11613
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    Confinement of a bioinspired nonheme Fe(II) complex in 2D hexagonal mesoporous silica with metal site isolation

    V. Jollet, B. Albela, K. Sénéchal-David, P. Jégou, E. Kolodziej, J. Sainton, L. Bonneviot and F. Banse, Dalton Trans., 2013, 42, 11607
    DOI: 10.1039/C3DT50590A

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