| 复合物p—C6H4F2...NH3（ND3）外部振动的共振双光子电离光谱 |
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| 引用本文： | 胡义华,杨新.复合物p—C6H4F2...NH3（ND3）外部振动的共振双光子电离光谱[J].量子电子学报,2000,17(2):161-167. |
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| 作者姓名： | 胡义华 杨新 |
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| 作者单位： | 胡义华（广东工业大学数理系广州 510090）;刘美希（广东工业大学数理系广州 510090）;周金运（广东工业大学数理系广州 510090）;王小涓（广东工业大学数理系广州 510090）;陈丽（广东工业大学数理系广州 510090）;杨新（香港科技大学化学系香港九龙清水湾）;杨世和（香港科技大学化学系香港九龙清水湾） |
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| 摘 要： | 利用共振光电离技术和飞行时间质谱技术，观察到了复合物ｐ－Ｃ６Ｈ４Ｆ２．．．ＮＨ３（ＮＤ３）的共振双光子电离光谱。光谱分析表明，复合物分子间的伸 振动频率为８６．４ｃｍ＾－１；由复合物光解离机理以及伸缩模的失谐参数与键有的关系。获得了复合物电子激发态Ｓ１和基态Ｓ０的键能信息。Ａｂｉｎｉｔｉｏ计算表明，ｐ－Ｃ６Ｈ４Ｆ２．．．ＮＨ３（ＮＤ）复合物的几何结构是：ＮＨ３分子中的Ｎ原子位于垂直ｐ－Ｃ６Ｈ４Ｆ２
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| 关 键 词： | 共振 多光子电离光谱 分子间振动 复合物 |
| 收稿时间： | 1999/4/21 |
| 修稿时间： | 1999年4月21日 |
Resonant Two-photon
Ionization Spectra of the Intermolecular Vibrations in p-C6H4F2 |
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| Hu Yihua.Resonant Two-photon
Ionization Spectra of the Intermolecular Vibrations in p-C6H4F2[J].Chinese Journal of Quantum Electronics,2000,17(2):161-167. |
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| Authors: | Hu Yihua |
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| Abstract: | We have studied theresonant two-photon ionizaition (R2PI) spectra of van der Waals complexes p-C6H4F2NH3...(ND3)through the S1←S0 transition withmass selectivity. Spectal analysis shows that the stretching frequencies of the complexesis about 86cm-1. From the photodissociation energy, we estimated the bond energy of the complexp-C6H4F2…NH3 in the S1 and S0 states. Abinitio calculation for p-C6/H4/F2/…NH3/ gives the following geometry: the N atom of NH3is located on the symmetry axis (Z-axis) and 0.353～nm above the benzene ring;the C3 axis of NH3is at an angle of 52.5° with the Z-axis of p-C6H4F2 withone of the hydrogen atoms pointing towards the benzene ring;the rotation of NH3around the Z-axis is nearly free. The calculataed bond dissociation energy and theprediction of internal rotation are consistent with our experimental results. |
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| Keywords: | resonant two-photon ionizaition spectra intermolecularvibrations vander Waals bond energy |
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