Photoreduction Mechanism of Nitrobenzene Derivatives by Using Methyl Viologen as a Mediator

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Bibliographic Information

Other Title
  • メチルビオロゲンを電子伝達体としたニトロベンゼン誘導体の光還元反応機構

Description

Photoreduction mechanism of nitrobenzene derivatives is investigated by using [Ru(bpy)3]2+-EDTA photoinduced electron transfer system and MV2+ as an electron mediator. Characterization of photoreduction products were carried out by the aid of 19F-NMRspectroscopy and p-F-PhNO2 as a substrate. Photoreduction of p-F-PhNO2 proceeded through three intermediate products (1-3) to result p-F-PhNH2 and at 200min irradiation, unidentified product 4 as final products in 57% and 17%, respectively. The photoreduction first afforded 1 with maximum yield of 52% after 80 min irradiation and decayed by further irradiation. The formation of intermediate product 2 was observed with the accumulation of 1 and gave a maximum rate at the maximum concentration of 1. 2 exhibited a maximum yield of 50% after 200 min irradiation and decrease thereafter, followed by the appearance of 2. Thus, the photoreduction is supposed to undergo successive reduction of p-F-PhNO2 -> 1 -> 2 -> p-F-PhNH2.

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Details 詳細情報について

  • CRID
    1390001205554833280
  • NII Article ID
    130004645262
  • DOI
    10.11494/kisoyuki.2008.0.153.0
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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