Home

Citation: Yang Da-Lin, Ling Yun, Ding Chuan-Fan, Zhou You, Zhu Qi-He. Methyl Iodide Multiphoton Ionization Via Ã State or C State[J]. Acta Physico-Chimica Sinica, ;1993, 9(04): 442-446. doi: 10.3866/PKU.WHXB19930403 shu

Methyl Iodide Multiphoton Ionization Via Ã State or C State

1.
State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080

Received Date: 22 March 1993
Available Online: 15 August 1993

The collision-free multiphoton ionization of jet cooling CH_3I was studied using a pulsed laser, tunable around 280 and 366 nm with TOF mass spectrometer and mag-netic-bottle TOF photoelectron spectrometer.
MPI of CH_3I in 280 nm region via valence Ã state can be explained by ladder-switch mechanism according to the following experimental results. The parent ions are almost abscent in the MPI TOF MS. I~+ MPI spectrum gives three resonances corre-sponding to two-photon excitation of I atom at 279.72, 279.25 and 278.50 nm. The I ionic state due to 2+1 REMPI of I atom can be assigned from the REMPI PES.
In 371—365 nm I~+, CH_3~+ and CH_3I~+ were observed in MPI MS. The mass-selected MPI spectra of CH_3I~+ and daughter ion I~+ have similar profiles. In the spectra the two peaks at 365.90 and 369.92 nm are assigned to be two-photon resonance with the Rydberg C state Π(0,0) and Σ(0,0) of CH_3I respectively. The formation of the CH_3I~+ ~2Π_(3/2) and ~2Π_(1/2) state created by 2+1 and 2+2 REMPI resectively were found in PES. REMPI of CH_3I around 366 nm is consistent with the ladder mechanism in which CH_3I is excited into C state upon a two photon absorption and parent ion is formed by the overall 2+1 of 2+2 MPI process. The fragment ions are produced by further dissociation of CH_3I~+ at Ã state.
- Methyl iodide; Multiphoton ionization; Multiphoton ionization spectroscopy; Photoelectron energy spectroscopy; Dissociation and ionization mechanism
1. [1]
  Zian Lin , Yingxue Jin . Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry (MALDI-MS) for Disease Marker Screening and Identification: A Comprehensive Experiment Teaching Reform in Instrumental Analysis. University Chemistry, 2024, 39(11): 327-334. doi: 10.12461/PKU.DXHX202403066
2. [2]
  Xiyuan Su , Zhenlin Hu , Ye Fan , Xianyuan Liu , Xianyong Lu . Change as You Want: Multi-Responsive Superhydrophobic Intelligent Actuation Material. University Chemistry, 2024, 39(5): 228-237. doi: 10.3866/PKU.DXHX202311059
3. [3]
  Zongpei Zhang , Yanyang Li , Yanan Si , Kai Li , Shuangquan Zang . Developing a Chemistry Experiment Center Employing a Multifaceted Approach to Serve High-Quality Laboratory Education. University Chemistry, 2024, 39(7): 13-19. doi: 10.12461/PKU.DXHX202404041
4. [4]
  Ruilin Han , Xiaoqi Yan . Comparison of Multiple Function Methods for Fitting Surface Tension and Concentration Curves. University Chemistry, 2024, 39(7): 381-385. doi: 10.3866/PKU.DXHX202311023
5. [5]
  Jizhou Liu , Chenbin Ai , Chenrui Hu , Bei Cheng , Jianjun Zhang . 六氯锡酸铵促进钙钛矿太阳能电池界面电子转移及其飞秒瞬态吸收光谱研究. Acta Physico-Chimica Sinica, 2024, 40(11): 2402006-. doi: 10.3866/PKU.WHXB202402006
6. [6]
  Liang TANG , Jingfei NI , Kang XIAO , Xiangmei LIU . Synthesis and X-ray imaging application of lanthanide-organic complex-based scintillators. Chinese Journal of Inorganic Chemistry, 2024, 40(10): 1892-1902. doi: 10.11862/CJIC.20240139
7. [7]
  Xin MA , Ya SUN , Na SUN , Qian KANG , Jiajia ZHANG , Ruitao ZHU , Xiaoli GAO . A Tb₂ complex based on polydentate Schiff base: Crystal structure, fluorescence properties, and biological activity. Chinese Journal of Inorganic Chemistry, 2024, 40(7): 1347-1356. doi: 10.11862/CJIC.20230357
8. [8]
  Conghao Shi , Ranran Wang , Juli Jiang , Leyong Wang . The Illustration on Stereoisomers of Macrocycles Containing Multiple Chiral Centers via Tröger Base-based Macrocycles. University Chemistry, 2024, 39(7): 394-397. doi: 10.3866/PKU.DXHX202311034
9. [9]
  Lin Ding , Jinpeng Zhang , Junfeng Li , Daying Liu . Color Catcher: A Marvelous Encounter of Starch and Iodine. University Chemistry, 2024, 39(6): 334-341. doi: 10.3866/PKU.DXHX202311064
10. [10]
  Tianlong Zhang , Rongling Zhang , Hongsheng Tang , Yan Li , Hua Li . Online Monitoring and Mechanistic Analysis of 3,5-diamino-1,2,4-triazole (DAT) Synthesis via Raman Spectroscopy: A Recommendation for a Comprehensive Instrumental Analysis Experiment. University Chemistry, 2024, 39(6): 303-311. doi: 10.3866/PKU.DXHX202312006
11. [11]
  Xiaowu Zhang , Pai Liu , Qishen Huang , Shufeng Pang , Zhiming Gao , Yunhong Zhang . Acid-Base Dissociation Equilibrium in Multiphase System: Effect of Gas. University Chemistry, 2024, 39(4): 387-394. doi: 10.3866/PKU.DXHX202310021
12. [12]
  Ruitong Zhang , Zhiqiang Zeng , Xiaoguang Zhang . Improvement of Ethyl Acetate Saponification Reaction and Iodine Clock Reaction Experiments. University Chemistry, 2024, 39(8): 197-203. doi: 10.3866/PKU.DXHX202312004
13. [13]
  Wen YANG , Didi WANG , Ziyi HUANG , Yaping ZHOU , Yanyan FENG . La promoted hydrotalcite derived Ni-based catalysts: In situ preparation and CO₂ methanation performance. Chinese Journal of Inorganic Chemistry, 2024, 40(3): 561-570. doi: 10.11862/CJIC.20230276
14. [14]
  Qin Hou , Jiayi Hou , Aiju Shi , Xingliang Xu , Yuanhong Zhang , Yijing Li , Juying Hou , Yanfang Wang . Preparation of Cuprous Iodide Coordination Polymer and Fluorescent Detection of Nitrite: A Comprehensive Chemical Design Experiment. University Chemistry, 2024, 39(8): 221-229. doi: 10.3866/PKU.DXHX202312056
15. [15]
  Yonghui ZHOU , Rujun HUANG , Dongchao YAO , Aiwei ZHANG , Yuhang SUN , Zhujun CHEN , Baisong ZHU , Youxuan ZHENG . Synthesis and photoelectric properties of fluorescence materials with electron donor-acceptor structures based on quinoxaline and pyridinopyrazine, carbazole, and diphenylamine derivatives. Chinese Journal of Inorganic Chemistry, 2024, 40(4): 701-712. doi: 10.11862/CJIC.20230373
16. [16]
  Yinuo Wang , Siran Wang , Yilong Zhao , Dazhen Xu . Selective Synthesis of Diarylmethyl Anilines and Triarylmethanes via Multicomponent Reactions: Introduce a Comprehensive Experiment of Organic Chemistry. University Chemistry, 2024, 39(8): 324-330. doi: 10.3866/PKU.DXHX202401063
17. [17]
  Xiaosong PU , Hangkai WU , Taohong LI , Huijuan LI , Shouqing LIU , Yuanbo HUANG , Xuemei LI . Adsorption performance and removal mechanism of Cd(Ⅱ) in water by magnesium modified carbon foam. Chinese Journal of Inorganic Chemistry, 2024, 40(8): 1537-1548. doi: 10.11862/CJIC.20240030
18. [18]
  Heng Zhang . Determination of All Rate Constants in the Enzyme Catalyzed Reactions Based on Michaelis-Menten Mechanism. University Chemistry, 2024, 39(4): 395-400. doi: 10.3866/PKU.DXHX202310047
19. [19]
  Yuejiao An , Wenxuan Liu , Yanfeng Zhang , Jianjun Zhang , Zhansheng Lu . Revealing Photoinduced Charge Transfer Mechanism of SnO₂/BiOBr S-Scheme Heterostructure for CO₂ Photoreduction. Acta Physico-Chimica Sinica, 2024, 40(12): 2407021-. doi: 10.3866/PKU.WHXB202407021
20. [20]
  Hao Wu , Zhen Liu , Dachang Bai . ¹H NMR Spectrum of Amide Compounds. University Chemistry, 2024, 39(3): 231-238. doi: 10.3866/PKU.DXHX202309020

Get Citation

PDF

XML

Metrics

PDF Downloads(2154)
Abstract views(3263)
HTML views(56)

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Address：Zhongguancun North First Street 2,100190 Beijing, PR China Tel: +86-010-82449177-888

DownLoad: Full-Size Img PowerPoint

Return