芳砜在微环境中的光化学反应

Photochemkal Reaction of Arylmethyl Sulphone in Microemulsions

本文研究了十二烷基磺酸钠-正戊醇-水三组分体系相图,并用小角度X衍射仪确定了相图中液晶区域为层状.在不同微环境(W/O型微乳液、液晶、O/W型微乳液)中,研究了对甲基苄基苄基砜(ASO_2B)的光化学反应影响.结果发现微环境对反应产物分布(笼效应)有很大影响外加磁场明显降低笼效应.证实了芳砜的光化学反应经历自由基中间体,并且反应的激发态为三重态.

The photochemical reactions of benzyl p-methylbenzyl sulfone (ASO2B) in sodium dodecylsulfonate (As)-pentanol-H2O microemulsions and lyotripic liquid crystals have been studied. The effects of microenviroments provided by microemulsion and lyotripic liquid crystal on product distribution have been investigated. While W/ O emulsion gave a cage effect analogoues to pentanol, the lyotripic liquid crystal and O / W emulsion provided supereages. This results were explained by consideration of the hydrophobic of the sulfone and the structure of the reaction media. Application of a weak external magnetic field to the photochemical reaction of ASO2B in O / W microemulsion leads to a decrease in cage effect, suggesting that the photochemical reaction proceeds via a triplet excited state.