对甲氧基苯甲腈的单色共振双光子电离光谱

发布时间：2018-05-26 08:20

本文选题：对甲氧基苯甲腈 + 共振多光子电离　；参考：《物理学报》2017年09期

【摘要】：对甲氧基苯甲腈是一种重要的化学化工原料,本文采用超声分子束技术和共振多光子电离方法获得了对甲氧基苯甲腈的单色共振双光子电离光谱,基态S0到电子激发态S1的0←0跃迁被确定为(35549±2)cm~(-1),结合含时密度泛函理论计算结果对观察到的光谱进行了振动模式标识和描述.实验发现呼吸振动模非常易于激活,其基频和二次泛频光谱很强,三次泛频也可明确标识,观察到大量呼吸振动与其他正则模的结合振动,这是对甲氧基苯甲腈不同于常见的多原子分子的一个重要特性.这些结果为研究对甲氧基苯甲腈的里德堡态、动力学和零动能光谱等提供了重要的参考数据.
[Abstract]:P-methoxybenzonitrile is an important chemical and chemical raw material. The monochromatic resonance two-photon ionization spectra of p-methoxy benzonitrile have been obtained by means of ultrasonic molecular beam technique and resonance multiphoton ionization method. The 0 ~ 0 transition from ground state S _ 0 to electron excited state S _ 1 is determined to be 35549 卤2? cm ~ (-1) ~ (-1). The observed spectra are characterized and described by means of time-dependent density functional theory (TDFT). The experimental results show that the respiratory vibration modes are very easy to activate, the fundamental frequency and the secondary flooding spectrum are very strong, the third frequency can also be clearly identified, and a large number of respiratory vibration combined with other regular modes are observed. This is an important characteristic of p-methoxybenzonitrile that is different from common polyatomic molecules. These results provide important reference data for the study of the Rydberg state, kinetics and zero kinetic energy spectra of p-methoxybenzonitrile.
【作者单位】：量子光学与光量子器件国家重点实验室山西大学激光光谱研究所;山西大学物理电子工程学院;
【基金】：国家重点基础研究发展计划(批准号:2012CB921603) 国家自然科学基金(批准号:61378039,61575115,11434007) 长江学者和创新团队发展计划(批准号:IRT13076) 量子光学与光量子器件国家重点实验室建设(批准号:2015012001-20)资助的课题~~
【分类号】：TQ246.7;O657.3

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