Water-Tolerant, Highly Active Solid Acid Catalysts Composed of the Keggin-Type Polyoxometalate H3PW12O40 Immobilized in Hydrophobic Nanospaces of Organomodified Mesoporous Silica

Authors

  • Kei Inumaru Prof. Dr.,

    1. Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1, Kagamiyama, Higashi-Hiroshima 739-8527, Japan, Fax: (+81) 82-424-5494
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  • Toru Ishihara,

    1. Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1, Kagamiyama, Higashi-Hiroshima 739-8527, Japan, Fax: (+81) 82-424-5494
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  • Yuichi Kamiya Prof. Dr.,

    1. Graduate School of Environmental Earth Science, Hokkaido University, North 10 West 5, Sapporo 060-0810, Japan
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  • Toshio Okuhara Prof. Dr.,

    1. Graduate School of Environmental Earth Science, Hokkaido University, North 10 West 5, Sapporo 060-0810, Japan
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  • Shoji Yamanaka Prof. Dr.

    1. Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1, Kagamiyama, Higashi-Hiroshima 739-8527, Japan, Fax: (+81) 82-424-5494
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  • This work was partly supported by a CREST project from the Japan Science and Technology Agency (JST), by Grant-in-Aid on Priority Areas (417) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT), and by Grant-in-Aid for Scientific Research (S, B) and for Creative Scientific Research from the Japan Society for the Promotion of Science (JSPS).

Abstract

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High activity in tight spaces: Polyoxometalate H3PW12O40 surrounded by hydrophobic alkyl groups in the channels of mesoporous silica (see picture) showed exceptionally high catalytic activity for ester hydrolysis in water. The nanostructure based on mesoporous silica allows the aqueous reaction mixture to easily reach the active sites, despite their being surrounded by hydrophobic moieties.

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