High Pressure Effects on Fluorescence-Quenching of Coumarin 343 Adsorbed on TiO2 Nanocrystallites in Methanol and in <i>N,N</i>-Dimethylformamide

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  • Masamitsu Matsumoto
    Graduate School of Material and Life Sciences, Osaka University
  • Kei Murakoshi
    Graduate School of Material and Life Sciences, Osaka University
  • Yuji Wada
    Graduate School of Material and Life Sciences, Osaka University
  • Shozo Yanagida
    Graduate School of Material and Life Sciences, Osaka University

抄録

<jats:title>Abstract</jats:title> <jats:p>The effect of high pressures up to 400 Mpa on the emission quenching of Coumarin 343 (C343) adsorbed on TiO2 nanocrystallites in methanol (MeOH) and N,N-dimethylformamide (DMF) solution was investigated. In MeOH, the quenching efficiency decreased as the pressure increased. This decrease was explained by the decrease of the adsorption strength of C343 onto TiO2 nanocrystallites. On the contrary, the efficiency in DMF increased with increase of pressure in spite of decrease of adsorption strength of C343 onto TiO2 under the high pressure condition, indicating enhancement in the electron transfer efficiency. The results imply that the high pressure technique can control the efficiency of photo-induced electron transfer systems.</jats:p>

収録刊行物

  • Chemistry Letters

    Chemistry Letters 29 (8), 938-939, 2000-08-01

    Oxford University Press (OUP)

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