first band is assigned to phenyldiazomethane, and the second is assigned to singlet phenylcarbene. This assignment is consistent with DFT calculations. Diazo band integration reveals that photoisomerization from diazirine to diazo occurs within a few picoseconds of the laser pulse. The majority of carbene produced is also formed instantaneously.
苯基
二氮嗪的超快激光闪光光解 (lambda(ex) = 270 nm) 在 2040 和 1582 cm(-1) 处产生瞬态红外吸收。第一个谱带归属于苯基
重氮甲烷,第二个谱带归属于单线态苯基卡宾。此分配与 DFT 计算一致。重氮带积分表明从重氮到重氮的光异构化发生在激光脉冲的几皮秒内。产生的大部分卡宾也是瞬间形成的。