作者:L.L. Costanzo、I. Fragala'、S. Giuffrida、G. Condorelli
DOI:10.1016/s0020-1693(00)87407-1
日期:1978.1
transfer was operating, suggesting that the 2′-acetonaphthone and complex triplet energies lies close to each other. With benzil as sensitizer the photoreactive state was not populated enough for the redox process to be observed. The overall results indicate that the photoreactive state is a charge transfer triplet state, whose population depends either on the intersystem crossing being faster than thermal
摘要研究了Co(dtp)3 [dtp-=(C 2 H 5 O)2 PS-2]在CH 2 Cl 2溶液中的光化学行为,它是沿所有吸收光谱辐射波长的函数。还研究了对三重态敏化剂能量的依赖性。Co(dtp)3→Co(dtp)2反应是通过在电荷转移或分子间配体光谱区域进行辐照而发生的,而配合物通过在配体场区域进行辐照而基本上是惰性的。通过增加照射波长,量子产率单调降低。用二环戊二烯基铁淬灭反应。二苯甲酮和2'-乙酰萘酮通过能量转移机制使氧化还原反应敏化。对于第一种敏化剂,发生了扩散控制的过程,因此,供体-受体三重态之间的能隙大于2.9 Kcal。第二个可能的可逆能量转移正在运行,这表明2'-乙酰萘酮和复杂的三重态能量彼此靠近。用苯甲醚作为敏化剂,其光反应性状态不足以观察到氧化还原过程。总体结果表明,光反应态是电荷转移三重态,其数量取决于系统间的交叉速度快于受激态的热平衡,或者取决于三重态能量energy59