水溶液中降冰片二烯衍生物敏化光异构化反应

Sensitized Photoisomerization of a Norbornadiene Derivative in Aqueous Solution

研究了水溶液中双环［２．２．１］－２，５－庚二烯－２，３－二羧酸在吖啶黄（ＡＹ）和吖啶橙（ＡＯ）的敏化作用下的光诱导价键异构化反应。量子效率分别为０．３３（ＡＹ）和０．３１（ＡＯ）．采用安全廉价的水为反应介质，通过荧光猝灭和热力学讨论提出了电子转移反应机理。

In an aqueous solution and under the sensitization of acridine yellow(AY) or acridine orange(AO), the photoisomerization of bicyclo [2. 2. 1 ] hepta-2, 5-diene-2, 3-dicarboxylic acid(N) was investigated. The quantum yields of sensitized photoisomerizations for AY and AO are 0. 33 and 0. 31, respectively. Since the reaction medium is water which is safe and inexpensive, the sensitizers can harvest sunlight effectively and the preparation of water-soluble norbornadiene derivative is very easy, this photo reaction system is promising for solar energy storage. A mechanism involving electron transfer was proposed from the analysis of fluorescence quenching and thermodynamic discussion.