影像科学与光化学 ›› 1989, Vol. 7 ›› Issue (2): 13-20.DOI: 10.7517/j.issn.1674-0475.1989.02.13

• 研究论文 • 上一篇    下一篇

香豆素酮类化合物的瞬态研究——Ⅰ.瞬态吸收光谱及其归属等的研究

吴世康1, 张建科1, J. P. Fouassier2, D. Burr2   

  1. 1. 中国科学院感光化学研究所, 北京 100012;
    2. 阿尔萨斯大学牟罗兹化学学校普通光化学实验室, 牟罗兹, 法国
  • 收稿日期:1987-11-27 修回日期:1988-04-11 出版日期:1989-05-20 发布日期:1989-05-20
  • 基金资助:
    国家自然科学基金

A TRANSIENT STUDY ON THE KETOCOUMARIN DERIVATIVES Ⅰ. THE TRANSIENT ABSORPTION SPECTRUM AND ITS ASSIGNMENT

WU SHI-KANG1, ZHANG JIAN-KE1, J. P. FOUASSIER2, D. BURR2   

  1. 1. Institute of Photographic Chemistry, Academia Sinica, Beijeijing 100012, P. R. China;
    2. Lab. de Photochimie Generale, Ecale de Chimie de Mulhouse, Mulhouse, prance
  • Received:1987-11-27 Revised:1988-04-11 Online:1989-05-20 Published:1989-05-20

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N2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εT、T-T湮灭常数κTT以及它们的三重态量子产率ΦT

关键词: 香豆素酮, 瞬态研究, 激光闪光光解, T-T湮没, 光引发剂, 光敏化剂

Abstract: 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.

Key words: ketocoumarin, transient state study, laser flash photolysis T-T annihilation, Photoinitiator, photosensitizer