物理化学学报 >> 1996, Vol. 12 >> Issue (01): 54-58.doi: 10.3866/PKU.WHXB19960112

研究简报 上一篇    下一篇

三苯基硫鎓盐衍生物激光闪光光解的研究

戴光松,吴世康,Schnabel W   

  1. 中国科学院感光化学研究所,北京 100101|Hahn-Meitner Institute Berlin GmbH,D-14109 Berlin,Germany
  • 收稿日期:1995-03-24 修回日期:1995-05-17 发布日期:1996-01-15
  • 通讯作者: 吴世康

Laser Flash Photolysis of Tri(4-tert-butoxycarbonyloxyphenyl) Sulphonium Salts

Dai Guang-Song,Wu Shi-Kang,Schnabel W   

  1. Institute of Photographic Chemistry,Academia Sinica,Beijing 100101|Hahn-Meitner Institute Berlin GmbH,D-14109 Berlin,Germany
  • Received:1995-03-24 Revised:1995-05-17 Published:1996-01-15
  • Contact: Wu Shi-Kang

关键词: 瞬态光谱, 光引发剂, 硫鎓盐

Abstract:

The photochemical and photophysical behaviors of tri(4-tert-butoxycarbonyl oxyphenyl) sulphonium salts have been investigated. In argon-satureted acetonitrile, the quantum yields of Bronsted acid formed during photolysis of these compounds was abount 0.5. In the transient absorption spectrum excited by 266nm in mathanol and dioxane an evident absorption peak at 360 nm decayed in accordance with pseudo-first-order reaction was observed. In the presence of poly-p-hydroxystyrene or diphenyl sulphide, the apparent second-order reaction decay rate constsnts were 107 and 108 L﹒mo-1﹒s-1, respectively. Results indicated that the transient absorption peak at 360nm was attributed to the diphenyl sulphide radical cations formed in photolysis of sulphonium salts, which were proposed by abstraction of hydrogen from solvent or polymer to yield the photonic acid and diphenyl sulphide as listed in eqns. (1) and (2). The influence of non-nuncleophilic anions of title compounds on their photochemical behavior was just less important.

Key words: Transient absorption spectra, Photoinitiator, Sulfonium salt