Flow Rate and Fluence Rate Dependences of the Triplet-State Lifetime of Talaporfin Sodium Photochemical Reaction in Flowing Solution
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概要
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The flow rate and fluence rate dependences of the triplet-state lifetime ($\tau_{\text{T}}$) and singlet oxygen (1O2) luminescence intensity of a Talaporfin sodium (mono-l-aspartyl chlorin e6, Laserphyrin\textregistered) photochemical reaction in a flowing solution were studied. The oxygen consumption rate constant ($k$) did not proportionally increase as the fluence rate increased. The relationship between the static oxygen concentration in the flowing solution and $\tau_{\text{T}}$ was estimated. $\tau_{\text{T}}$ at the fluence rate of $0.8\times 10^{4}$ W/m2 was 16% longer than that at $0.2\times 10^{4}$ W/m2 at the same oxygen concentration. The $\tau_{\text{T}}$ increase at the high-fluence rate is attributed to local and temporal oxygen depletion. The local and temporal oxygen depletion might cause the fluence-rate dependence nonproportionality of the measured $k$.
- 2007-03-15
著者
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Arai Tsunenori
School Of Fundamental Science And Technology Graduate School Of Science And Technology Keio Universi
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Hakomori Shiho
School Of Fundamental Science And Technology Graduate School Of Science And Technology Keio Universi
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Ohmori Sayaka
School Of Fundamental Science And Technology Graduate School Of Science And Technology Keio Universi
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Arai Tsunenori
School of Fundamental Science and Technology, Graduate School of Science and Technology, Keio University, Yokohama 223-8522, Japan
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Ohmori Sayaka
School of Fundamental Science and Technology, Graduate School of Science and Technology, Keio University, Yokohama 223-8522, Japan
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Hakomori Shiho
School of Fundamental Science and Technology, Graduate School of Science and Technology, Keio University, Yokohama 223-8522, Japan
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- Flow Rate and Fluence Rate Dependences of the Triplet-State Lifetime of Talaporfin Sodium Photochemical Reaction in Flowing Solution