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      Handedness Inversion of Chiral Amphiphilic Molecular Assemblies Evidenced by Supramolecular Chiral Imprinting in Mesoporous Silica Assemblies

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      Chemistry - A European Journal
      Wiley-Blackwell

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          Supramolecular nanotube architectures based on amphiphilic molecules.

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            Synthesis and characterization of chiral mesoporous silica.

            Chirality is widely expressed in organic materials, perhaps most notably in biological molecules such as DNA, and in proteins, owing to the homochirality of their components (d-sugars and l-amino acids). But the occurrence of large-scale chiral pores in inorganic materials is rare. Although some progress has been made in strategies to synthesize helical and chiral zeolite-like materials, the synthesis of enantiomerically pure mesoporous materials is a challenge that remains unsolved. Here we report the surfactant-templated synthesis of ordered chiral mesoporous silica, together with a general approach for the structural analysis of chiral mesoporous crystals by electron microscopy. The material that we have synthesized has a twisted hexagonal rod-like morphology, with diameter 130-180 nm and length 1-6 micro m. Transmission electron microscopy combined with computer simulations confirm the presence of hexagonally ordered chiral channels of 2.2 nm diameter winding around the central axis of the rods. Our findings could lead to new uses for mesoporous silica and other chiral pore materials in, for example, catalysis and separation media, where both shape selectivity and enantioselectivity can be applied to the manufacturing of enantiomerically pure chemicals and pharmaceuticals.
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              Organic Templates for the Generation of Inorganic Materials

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                Author and article information

                Journal
                Chemistry - A European Journal
                Chem. Eur. J.
                Wiley-Blackwell
                09476539
                February 27 2012
                February 27 2012
                : 18
                : 9
                : 2559-2564
                Article
                10.1002/chem.201102146
                22266981
                e0a25599-5745-4baf-95e9-a640e80e0e75
                © 2012

                http://doi.wiley.com/10.1002/tdm_license_1.1

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