High-Resolution, Rotationally Resolved Electronic Spectroscopy of the MgNC Radical.
High-Resolution, Rotationally Resolved Electronic Spectroscopy of the MgNC Radical.
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MgNC 自由基的高分辨率旋转分辨电子光谱。
DOI：
10.1006/jmsp.1998.7788
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发表时间：
1999
影响因子：
1.4
通讯作者：
Miller
中科院分区：
文献类型：
--
作者：
Wright;Miller
高分辨率，旋转分辨，激光诱导荧光（LIF）光谱的起源带，以及几个跃迁涉及振动激发水平的<$2Pi <-- &Xtilde2Sigma+电子跃迁的MgNC自由基，已被记录使用脉冲放大的Ti：蓝宝石环形激光器的输出。通过激光烧蚀镁棒和乙腈（CH 3CN）的光解，在超声速自由射流膨胀中产生MgNC自由基。转动分析得到的分子常数的研究振动跃迁的基态和激发态。与以前的微波研究的MgNC的Xtilde状态的无振动状态的分子常数是非常好的协议。由于MgNC的π电子态是线性2 Pi态，弯曲振动能级结构受到Renner-Teller和自旋轨道耦合的影响。建议振动分配所观察到的过渡，考虑到这些相互作用和旋转分析的帮助下，进行了讨论。版权所有1999年学术出版社。
High-resolution, rotationally resolved, laser-induced fluorescence (LIF) spectra for the origin band, as well as several transitions involving vibrationally excited levels of the Ã2Pi <-- &Xtilde2Sigma+ electronic transition of the MgNC radical, have been recorded using the output of a pulse-amplified Ti:Sapphire ring laser. The MgNC radical was generated in a supersonic free jet expansion by simultaneous laser ablation of a magnesium rod and photolysis of acetonitrile (CH3CN). Rotational analysis yielded molecular constants for both the ground and excited states of the studied vibronic transitions. The molecular constants for the vibrationless state of the &Xtilde state are in excellent agreement with previous microwave studies of MgNC. Since the à electronic state of MgNC is a linear 2Pi state, the bending vibronic level structure is subject to both Renner-Teller and spin-orbit coupling. Suggested vibronic assignments of the observed transitions, made considering both these interactions and with the aid of the rotational analysis, are discussed. Copyright 1999 Academic Press.