影像科学与光化学 ›› 1997, Vol. 15 ›› Issue (4): 351-356.DOI: 10.7517/j.issn.1674-0475.1997.04.351

• 研究简报 • 上一篇    下一篇

激光诱导荧光衰减探测光化学反应

王文科, 魏杰, 黄毓礼   

  1. 北京化工大学材料科学与工程学院, 北京100029
  • 收稿日期:1997-01-15 修回日期:1997-05-19 出版日期:1997-11-20 发布日期:1997-11-20
  • 通讯作者: 黄毓礼
  • 基金资助:
    国家教委博士基金资助项目(批准号:9401003)

LASER INDUCED FLUORESCENCE ATTENUATION PROBES THE KINETIC PROCESS OF PHOTOCHEMICAL REACTION

WANG Wenke, WEI Jie, HUANG Yuli   

  1. Beijing University of Chemical Technology, Institute of Materials Science and Engineering, Beijing 100029
  • Received:1997-01-15 Revised:1997-05-19 Online:1997-11-20 Published:1997-11-20

摘要: 激光荧光光谱为重要光谱分析手段之一,广泛用于物理、化学、生物学等研究领域。 但对于一些含有发色基团的大有机分子,由于分子振动自由度很大,振动能级连续分布, 其荧光谱成为宽展的光谱带,振动带结构不复存在,使荧光光谱难于用作样品的成份鉴定。对于溶液样品由于分子间的碰撞及长程力的作用,也可能造成荧光猝灭和分子间电 子能量转移,特别是对那些吸收光子后易发生光分解的物质,所产生的新分子或碎片往 往也有荧光特征,叠加在原有分子的荧光带上,使得所要检测的任何一种成份的荧光强 度对所有其它荧光猝灭物和敏化物的浓度及其荧光特征有很复杂的依赖关系,这就增加 了对实验所得到的荧光光谱解释的难度。

关键词: 激光诱导荧光光谱, 光化学反应

Abstract: The kinetic process of photochemical reaction of diazophthopuinon system was studied by laser induced fluorescence attenuation. The nonlinear relation between photodecomposion of the system and laser power was observed and investigated in detail at 457.9 nm laser line. It is found that the final product of the reaction mentioned above strongly fluoresces and that it peaks at 567.0 nm while the diazonaphthoquinon peaks at 589.3 nm.

Key words: laser induced fluorescence attenuation, photochemical reaction