• selective oxidation of benzyl alcohol to benzaldehyde over co-metalloporphyrin supported on silica nanoparticles

    نویسندگان :
    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 1074
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     heterogenation of the metalloporhyrin ligand, [tetrakis(o-chlorophenyl)porphyrinato]co(ii) was effected by immobilizing the complex onto inorganic silica support to form spherical nanoparticles of rhac-copor. this insoluble mesoporous hybrid showed a high specific surface area of 114 m2 g−1 and a pore volume of 0.177 cm3 g−1. the prepared catalyst possessed a narrow pore size distribution centered at around 4.17 nm. the 13c mas nmr showed that rhac-copor had three chemical shifts at 12.60, 26.60 and 45.18 ppm consistent with the three carbon atoms of the propyl group and a series of chemical shifts in the range ofδ = 108–167 ppm consistent with the presence of the metalloporphyrin complex. elemental analysis showed the successful immobilization of metalloporphyrin complex onto functionalized rha silica support. rhac-copor appeared to be an active catalyst in the oxidation of benzyl alcohol, producing 97.1% conversion and 97.7% selectivity for benzaldehyde under an ambient temperature of 70 °c. rhac-copor could be regenerated and reused several times by washing with water, followed by drying at 100 °c.

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