- 學位論文
腔體震盪光譜法於二碘甲烷的光分解研究
Photodissociation of diiodomethane by using cavity ring down spectroscopy
並列摘要
Cavity ring-down spectroscopy (CRDS) is a relatively new and quite sensitive technique for the measurement of gas phase. It holds the potential for simple, direct and sensitive measurement of the concentrations of a variety of trace gases in the atmosphere. In this thesis, We used CRDS to detect I2 produced from photodissociation of CH2I2. We can confirm this primary dissociation channel by energy dependence and pressure dependence experiments. The vibrational population ratio was found to be v0:v1:v2=1:0.65±0.1:0.3±0.05 .The quantum yield for the I2 elimination reaction is determined to be 0.004±0.002. We propose I2 elimination may process through the electronic ground state by internal conversion. This hypothesis is supported by the result of temperature dependence experiment. Moreover, the results agree with a given theoretical calculation.
參考文獻
延伸閱讀
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