Uranyl Ion-Sensitized Isomerization of the Stilbenes in Solution

スポンサーリンク

概要

• 論文の詳細を見る

• By selective excitation of the uranyl ion with light of λ≥365 nm, a deoxygenated acetone solution containing <I>cis</I>- or <I>trans</I>-stilbene and the uranyl ion finally reaches a photostationary state, whose isomer ratio, (<I>t</I>⁄<I>c</I>)<SUB>pss</SUB>, varies from 1 to 3 depending on the concentrations of the uranyl ion and the stilbenes. A close correlation is found between the features in the sensitized isomerization and the phosphorescence quenching of the sensitizer. Comparison with the results of halogen radical induced isomerization suggests that catalytic isomerization by free radicals is not an important process. A triplet-triplet energy transfer mechanism is proposed, which is supported by the oxygen effect and considerations on the lowest excited state of the uranyl ion, <I>i.e.</I>, its long lifetime and triplet energy level higher than that of the stilbenes.

• 公益社団法人 日本化学会の論文

著者

• Kishimoto Tsuneo

  Department of Industrial Chemistry, Faculty of Engineering, Shizuoka University

関連論文

• Photoreactions of flavanones.
• Uranyl Ion-Sensitized Isomerization of the Stilbenes in Solution

スポンサーリンク