摘要
本文应用气相色谱、富里叶红外光谱和紫外-可见光谱等技术研究了253.7mm紫外光照射下CF_3Br-O-2体系中的光化学反应过程,实验结果表明,当作为自由基捕捉剂的O_2足量时,CF_3Br的光解离呈一级反应,其反应速率常数为2.67×10^(-5)s^(-1),CF_3Br的表现量子产额近似为1,主要的反应产物是CF_2O,Br_2和F_2,在此基础上讨论了CF_3Br光氧化反应的机理。
GC．FTIR and UV－Visible spectroscopy have been applied to the studyofphoto－chemlstry In the CF_3Br^(－（）)_2 system at 253． 7urn． With a sufficiency of oxygen——the effi-cient scavenger of CF_3,the photo-dissociation of CF_3br is afirst-order reaction while the corresponding rate constant being 2.67*10-5s-1,and the major products are CF2O,Br2and F2.The apparent quantum yield of CF3Br has been measured in this work,its value being around 1.The photo-oxidation mechanism of CF3Br has also been discussed on the basis of the experimental results.
出处
《环境化学》
CAS
CSCD
北大核心
1998年第6期517-522,共6页
Environmental Chemistry
基金
国家自然科学基金资助项目:基金项目批准号:29477265
