Homolytic cleavage of C–Si bond of p-trimethylsilylmethylacetophenone upon stepwise two-photon excitation using two-color two-laser flash photolysis
作者:Xichen Cai、Masanori Sakamoto、Michihiro Hara、Susumu Inomata、Minoru Yamaji、Sachiko Tojo、Kiyohiko Kawai、Masayuki Endo、Mamoru Fujitsuka、Tetsuro Majima
DOI:10.1016/j.cplett.2005.03.127
日期:2005.5
occurred in a higher triplet excited state (Tn), giving mainly p-acetylbenzyl radical with the transient absorption in the region of 295–360 nm, with a quantum yield of 0.046 ± 0.008 using the two-color two-laser photolysis techniques. In contrast, the C–Si bond cleavage of p-trimethylsilylmethylbenzophenone(2) was absent in the Tn state whose energy is larger than the C–Si bond cleavage energy. The results
对-三甲基甲硅烷基甲基苯乙酮(1)的C-Si键裂解发生在更高的三重激发态(T n),主要产生对乙酰基苄基,其瞬态吸收在295-360 nm范围内,量子产率为0.046± 0.008使用两色两激光光解技术。与此相反,的C-Si键裂解p -trimethylsilylmethylbenzophenone(2)是在T缺席Ñ状态其能量比C-Si键裂解的能量大。结果可T形电位表面之间解释键裂交叉的存在Ñ状态和C-Si键的用于离解状态1,但不是2。