实验研究了233～243 nm激光波长范围内甲胺分子的REMPI质谱特性,在λ=240 nm处,分析了质谱中M30、M28、M15三种离子信号强度随激光能量的变化关系.得到他们电离的光强指数.理论上分别用密度泛函量化计算方法分析了不同解离通道热焓的变化.实验分析与理论结果相对比,对这三种离子进行了归属.
参考文献
| [1] | Robin M B.High Excited States of Polyatomic Molecules[M].New York and London:Academic Press,209-229. |
| [2] | Waschewsky G C G,Kitchen D C,Browning P W,et al.Competing bond fission and molecular elimination channels in the photodissociation of CH《,3NH《,2 at 222 nm[J].J.Phys.Chem.,1995,99:2635-2645. |
| [3] | Baek S J,Kyo-Won C,Young S C,et al.Vibrational structures of predissociating methyl amines(CH《,3NH《,2 and CH《,3ND《,2) in A states:free internal rotation of CH《,3 with respect to NH《,2[J].J.Chem.Phys.,2002,117(22):10057-10060. |
| [4] | Baek S J,Kyo-Won C,Young S C,et al.Spectroscopy and dynamics of methyl amine.Ⅰ.Rotational and vibrational structures of CH《,3NH《,2 and CH《,3NH《,2 in A states[J].J.Chem.Phys.,2003,118(24):11026-11039. |
| [5] | Baek S J,Kyo-Won C,Young S C.Spectroscopy and dynamics of methyl amine.Ⅱ.Rotational and vibrational structures of CH《,3NH《,2 and CH《,3ND《,2 in cationic Do statesm[J].J.Chem.Phys.,2003,118(24):11040-11047. |
| [6] | Ochterski J W.Thermoehemistry in Gaussian[M].Gaussian,Inc.2000. |
| [7] | Zhang Xia,Kong Xianghe,Fan Xinyan,et al.Different influences of laser polarization on REMPI massspectroseopy of oxygen and acetone molecules[J].Journal of Atomic and Molecular Physics (原子分子物理学报),2005,22(3):566-572 (in Chinese). |
| [8] | Edward P,Gardner,James R M.Vacuum-ultraviolet photolysis of methylamine[J].J.Phys.Chem.,1982,86:2646-2651. |
| [9] | Zhang Shudong,Zhang Mingxia,et al.Analysis of the peak profile in time-of-flight mass spectrum[J].Chinese Journal of Quantum Electronics (量子电子学报).2007,24(4):438-442 (in Chinese). |
| [10] | Lin Xiaojun,Zhang Bing,Fang Li,et al.Study of the multiphoton ionization mass spectra of methylamine[J].Acta.Phys.Chem.(物理化学学报),1996,12(11):981-985 (in Chinese). |
| [11] | Foresman J B,Frisch A.Exploring Chemistry with Electronic Structure Method[M].Gaussian,Inc.,1-66. |
| [12] | Fang Li,Zhang Bing,Liu Xiaojun,et al.Wavelength dependence of resonance-enhanced multipoton ionization of methylamine[J].Acta Optica Sinica (光学学报),1997,17(12):1638-1641 (in Chinese). |
| [13] | Qiao Guang,Kong Xianghe,et al.The study of multiphoton ionization of methylamine at 355 am[J].Journal of Atomic and Molecular Physics (原子分子物理学报),2007,24(3):509-512 (in Chinese). |
| [14] | Kerkeni B,Clary D C.Quantum scattering study of the abstraction reaction of H atoms from CH《,3NH《,2[J].Chemical Physics Lett.,2007,438:1-7. |
| [15] | Liu Jianping,Kong Xianghe,Zhang Shudong,et al.Study on mnltiphoton ionization dissociation processes of 1,3-dibromobenzene at 266 nm laser radiation[J].Chinese Journal of Quantum Electronics (量子电子学报),2007,24(6):678-682 (in Chinese). |
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