Dyer Joanne, Jockusch Steffen, Balsanek Vojtech, Sames Dalibor, Turro Nicholas J
Department of Chemistry, Columbia University, New York, New York 10027, USA.
J Org Chem. 2005 Mar 18;70(6):2143-7. doi: 10.1021/jo048053c.
[reaction: see text] Two-photon induced Wolff rearrangement of a terphenyl diazoketone 1 was achieved by using focused laser pulses of 532 nm from a Q-switched Nd:YAG laser. The nonfluorescent terphenyl diazoketone 1 was transformed into a fluorescent ester derivative 4, which can be detected in situ using the focused laser pulses at 532 nm. Laser power dependence studies show that the Wolff rearrangement is induced by two-photon absorption of the terphenyl diazoketone 1, but suggests that more than two photons of 532 nm are involved (a multiphoton process) in excitation of the ester derivative 4.
[反应：见正文] 通过使用调Q Nd:YAG激光器产生的532 nm聚焦激光脉冲，实现了三联苯重氮酮1的双光子诱导Wolff重排。非荧光三联苯重氮酮1转化为荧光酯衍生物4，该衍生物可使用532 nm聚焦激光脉冲原位检测。激光功率依赖性研究表明，Wolff重排是由三联苯重氮酮1的双光子吸收诱导的，但表明在酯衍生物4的激发过程中涉及超过两个532 nm的光子（多光子过程）。
