光解
天顶
量子产额
分析化学(期刊)
硝酸盐
衰减系数
化学
化学发光
太阳天顶角
材料科学
光化学
光学
物理
物理化学
大气科学
环境化学
荧光
有机化学
作者
Winston T. Luke,Russell R. Dickerson
标识
DOI:10.1029/gl015i011p01181
摘要
We report the direct measurement of the photolysis rate coefficient of ethyl nitrate to NO 2 and the ethoxy radical: using a luminol chemiluminescence NO 2 detector. The photolysis of ethyl nitrate is slow: at a temperature of 288 K and a zenith angle of 60°, j 1 = 0.45 × 10 −6 s −1 . At a zenith angle of 0°, j 1 is estimated to be ca. 1.1 × 10 −6 s −1 . This implies a photolytic lifetime of about one month in the planetary boundary layer. The photolysis frequency is very temperature dependent, and approximately doubles between 279 and 299 K. Observed photolysis rate coefficients agree, within experimental uncertainty, with coefficients calculated using recently measured absorption cross‐sections and an assumed quantum yield of unity.
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