• preparation of amine-immobilized solid base catalysts by plasma polymerization of 1,2-diaminocyclohexane

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 898
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     thin films were deposited onto silica–alumina powders by plasma polymerization of 1,2-diaminocyclohexane to prepare amine-immobilized solid base catalysts. the existence of amine moieties in the films was confirmed by solid-state 13c nmr, ft/ir, and xps analyses. the silica–alumina powders deposited with the films showed strong base catalytic activity when evaluated based on the adsorption/desorption pattern of acidic gases (no2 and co2) and the conversion of benzaldehyde in knoevenagel condensation reaction between benzaldehyde and ethylcynoacetate. adsorbed acidic gases still remained even at 400 °c due to strong chemisorptions. when the plasma polymerization was carried out by a two-step process, the conversion was as high as 91.2% and adhesion of the films could be improved. the conversion was 82.0% even after the repeated use for 3 times when the films were deposited by the two-step process.

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