Comparison of Singlet Oxygen Production Efficiency of C_<60> with Other Photosensitizers, Based on 1268nm Emission

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概要

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• Singlet oxygen generation from laser-excited C_<60> was measured directly by using a sensitive near-infrared emission spectrometer to monitor the O_2(^1Δ_g)→O_2(^3Σ_g^-) transition at 1268nm. The emission intensity was proportional to both the laser power and the concentration of C_<60>. When nitrogen gas was bubbled into the C_<60> solution, the spectrum disappeared. Dose-dependent quenching of singlet oxygen by β-carotene was observed by monitoring the 1268nm emission. Based on the quenching, the rate constant of the reaction of singlet oxygen with β-carotene was determined to be 1.5-2.3×10^<10>M^<-1>s^<-1>, which is consistent with the reported value (1.5-2.5×10^<10>M^<-1>s^<-1>). A comparison of the singlet oxygen-producing ability of C_<60> as a photosensitizer with those of rose bengal. eosin and methylene blue, revealed C_<60> to have considerably higher efficiency.

• 公益社団法人日本薬学会の論文
• 1994-11-15

著者

• 広部 雅昭

  Faculty of Pharmaceutical Sciences, University of Tokyo

• 荒金 久美

  コーセー研究所

• 荒金 久美

  Research Laboratory, KOSE Corporation

• 中隅 哲郎

  Institute de Pesouisas de Plantas Medicinais do Brazil

• 広部 雅昭

  Faculty Of Pharmaceutical Sciences University Of Tokyo

• 荒金 久美

  コーセー 研究本部

• 荒金 久美

  Research Laboratory Kose Corporation

• 中隅 哲郎

  Faculty of Pharmaceutical Sciences, University of Tokyo

• 笠 明美

  Research Laboratory, KOSE Corporation

• 増永 卓司

  Research Laboratory, KOSE Corporation

• 新本 浩一

  Research Laboratory, KOSE Corporation

• 益子 信郎

  Communications Research Laboratory

• 荒金 久美

  コーセー 開研

• 増永 卓司

  Research Laboratory Kose Corporation

• 新本 浩一

  Research Laboratory Kose Corporation

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