Direct Observation of Singlet Phenylnitrene and Measurement of Its Rate of Rearrangement
作者:Nina P. Gritsan、Tetsuro Yuzawa、Matthew S. Platz
DOI:10.1021/ja963753n
日期:1997.5.1
decay of this species, at ambient temperature, isfaster than the time resolution of the spectrometer (1 -2 ns).At lower temperatures (<280 K) the formation of the transientremains “instantaneous”, but its decay can be resolved. At lowtemperatures the decay of the 350 nm absorbing transient isaccompanied by the formation of ketenimine 3 which absorbsbroadly above 300 nm
我们发现重排的障碍比之前推断的要大,因为 ISC 比最初预期的要慢得多。在戊烷中通过激光闪光光解 (LFP, Nd-YAG, 150 ps, 266 nm, 10 mJ) 研究了叠氮化苯 1。在室温下观察到 350 nm 处的瞬态吸收。该物质的形成和衰变在环境温度下比光谱仪的时间分辨率 (1 -2 ns) 快。在较低温度 (<280 K) 下,瞬变的形成仍然是“瞬时”的,但它的衰变可以解决。在低温下,350 nm 吸收瞬变的衰减伴随着酮烯亚胺 3 的形成,后者在 300 nm 以上广泛吸收