Spectroscopic and chemical evidence for methylene singlet-triplet intersystem crossing in solution
作者:Nicholas J Turro、Yuan Cha
DOI:10.1016/s0040-4039(00)85419-2
日期:1986.1
Singlet-tripletintersystem crossing of methylene in perfluorohexane solution has been investigated by CIDNP. Evidence of this process is shown by the polarized absorption 1H-NMR signal of Cl3CCH2D, a triplet product, which is obtained upon direct irradiation of diazirine in perfluorohexane solution containing saturated deuteriochloroform. These results are confirmed by product analysis as a function
CIDNP研究了全氟己烷溶液中亚甲基的单重态-三重态系统间相交。Cl 3 C byCH 2 D的极化吸收1 H-NMR信号显示了该过程的证据,Cl 3 C = CH 2 D是三重态产物,是通过在含有饱和氘代氯仿的全氟己烷溶液中直接照射二嗪嗪而获得的。这些结果通过产物分析证实为全氟己烷稀释的函数。由数据将单线亚甲基到三线亚甲基的系统间交叉的速率常数评估为8×10 8 S -1。