单光子LIF方法研究亚硝基苯266nm光解动力学  

Photodissociation Dynamics of Nitrosobenzene by Means of LIF

作　　者：孙巨龙[1] 李亚民[1] 陈茂笃[1] 韩克利[1] 李学初[1] 何国钟[1] 楼南泉[1] 

机构地区：[1]中国科学院大连化学物理研究所

出　　处：《Chinese Journal of Chemical Physics》2001年第2期129-134,共6页化学物理学报（英文）

基　　金：国家自然科学基金!资助项目 (2 99530 0 1)&&

摘　　要：用 2 6 6nm激光解离亚硝基苯 (C6 H5NO)产生光解碎片NO ,并利用单光子激光诱导荧光(LIF)技术 (X2 Πν″ =0→A2 Σ+ ν′ =0 )测得初生态光解产物NO的振转光谱。根据计算所得的模拟光谱对光解碎片NO(X ,ν″ =0 )的转动量子数J″进行了归属 ,得到量子数最大到J″ =50 .5的各转动能级的相对布居 ,这表明光解碎片NO具有较高的转动激发。提出了C6 H5NO在 2 6 6nm下可能的光解机理。The photodissociation of nitrosobenzene (C 6H 5NO) at 266nm has been studied by monitoring the nascent NO product using a one-photon laser-induced fluorescence (LIF) technique.The NO (X 2Π ν″=0→ A 2Σ + ν′=0) ro-vibrational spectrum was obtained. The J' quantum numbers of NO (X, ν″=0) populated in the dissociation process have been assigned by comparing the experimental spectrum with the simulated spectrum. The rotational distributions with quantum numbers up to J″ =50.5 were obtained. This means that the NO (X) fragments produced in the dissociation process are of highly rotational excitation. The probable photolysis mechanism is proposed for the photodissociation of C 6H 5NO at 266nm.

关 键 词：亚硝基苯 单光子激光诱导荧光光谱 光解动力学 一氧化氮 振转光谱 

分 类 号：O644.19[理学—物理化学]