[reaction: see text]. Photolysis of 3-(hydroxymethyl)benzophenone (1) in aqueous solution (pH < 3) results in clean formation of 3-formylbenzhydrol (2) at dilute (<10(-4) M) conditions. Evidence suggests that the highly efficient (Phi approximately 0.6) reaction involves a unimolecular mechanism and an overall formal intramolecular photoredox process, which requires electronic communication between
[反应:请参见文字]。3-(羟甲基)
二苯甲酮(1)在
水溶液(pH <3)中的光解作用导致在稀(<10(-4)M)条件下干净地形成3-甲酰基苯甲醇(2)。有证据表明,高效的(Phi约为0.6)反应涉及单分子机理和整个分子内光氧化还原过程,这需要苯环的1,3-位之间进行电子通讯,这是光化学元效应的空前例子。在有机溶剂中未观察到光氧化还原反应,在有机溶剂中仅观察到
二苯甲酮部分的光还原。