Photolysis of γ-azidobutyrophenone derivatives yields 1,4 ketyl biradicals via intramolecular H-atom abstraction. The 1,4 ketyl biradicals expel a nitrogen molecule to form 1,5 ketyl iminyl biradicals, which decay by ring closure to form a new carbon−nitrogen bond. The 1,5 ketyl iminyl biradicals were characterized with transient spectroscopy. In argon/nitrogen-saturated solutions, the biradicals have
γ-
叠氮基丁
二苯甲酮衍
生物的光解作用通过分子内H原子抽象产生1,4酮基双自由基。1,4酮基双自由基将一个氮分子排出,形成1,5酮基亚
氨基双自由基,通过闭环衰变形成新的碳-氮键。1,5酮基亚
氨基双自由基用瞬态光谱法表征。在
氩气/氮气饱和溶液中,双自由基的最大波长为λmax≈300 nm,τ= 15μs。DFT-TD计算用于支持所提出的形成1,5酮基亚
氨基基团的机理。