The Direct Detection of an Aryl Azide Excited State:An Uitrafast Study of the Photochemistry of para-and ortho-Biphenyl Azide

摘要

Photolysis of aryl diazo compounds and azides produces carfaenes and nitrenes,respectively,which have received extensive study by nanosecond(ns)time-resolved spectroscopy and other physical methods.The excited states of aryl diazo compounds have been recently detected by femtosecond spectroscopy.Herein,we report the first observation of aryl azide excited singlet states and the formation of the related singlet nitrenes.