摘要
利用激光闪光光解设备研究了香豆素酮类化合物的瞬态光谱。通过对瞬态产物寿命的测定以及在N_2与空气中比较瞬态产物衰退曲线的特征可以认为,在瞬态光谱中以410nm为中心的吸收应归属于香豆素酮的三重态。工作中还测定了香豆素酮三重态的克分子吸收系数ε_T、T-T湮灭常数κ_(TT)以及它们的三重态量子产率Φ_T。
In this work, the transient spectra of ketocoumarin derivatives have been studied by laser flash photolysis method. It was confirmed that the absorption which is centered at 410 nm in transient spectrum is assigned to the triplet state of ketocoumarin by means of the life time measurement and the comparison of characteristics in the decay curve of transient species under different atmosphere. Meanwhile, the molar absorption coefficient of triplet state, the rate constant of T-T annihilation, and the triplet quantum yield of this compound were also determined.
出处
《感光科学与光化学》
CSCD
1989年第2期13-20,共8页
Photographic Science and Photochemistry
基金
国家自然科学基金
关键词
香豆素酮
瞬态
吸收光谱
衍生物
ketocoumarin, transient state study, laser flash photolysis T-T annihilation, Photoinitiator, photosensitizer
