Home

Citation: ZHANG Feng, CAO Zhen-Zhou, QIN Xiao, LIU Yu-Zhu, WANG Yan-Mei, ZHANG Bing. C—Br Bond Dissociation Mechanisms of 2-Bromothiophene and 3-Bromothiophene at 267 nm[J]. Acta Physico-Chimica Sinica, ;2008, 24(08): 1335-1341. doi: 10.1016/S1872-1508(08)60055-8 shu

C—Br Bond Dissociation Mechanisms of 2-Bromothiophene and 3-Bromothiophene at 267 nm

1.
State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, P. R. China; Graduate School of the Chinese Academy of Sciences, Beijing 100049, P. R. China

Received Date: 3 April 2008
Available Online: 5 June 2008

C—Br bond dissociation mechanisms of 2-bromothiophene and 3-bromothiophene at 267 nm were investigated using ion velocity imaging technique. Translational energy distributions and angular distributions of the photoproducts, Br(2P3/2) and Br*(2P1/2), were obtained and the possible dissociation channels were analyzed. For these two bromothiophenes, the Br fragments were produced via three channels: (i) the fast predissociation following the intersystemcrossing fromthe excited singlet state to repulsive triplet state; (ii) the hot dissociation on highly vibrational ground state following the internal conversion of the excited singlet state; and (iii) dissociation following the multiphoton ionization of the parent molecules. Similar channels were involved for photoproduct Br* of the 2-bromothiophene dissociation at 267 nm; while for the photoproduct Br* of 3-bromothiophene, the dissociation channel via internal conversion from the excited singlet state to highly vibrational ground state became dominating and the fast predissociation channel via the excited triplet state almost disappeared. Informations about the relative contribution, energy disposal, and the anisotropy of each channel were quantitatively given. It was found that with the position of Br atom in the thienyl being far from S atom, the relative ratios of products from channels (i) and (ii) decreased obviously and the anisotropies corresponding to each channel became weaker.
- Bromothiophene,
- Photodissociation,
- Ion velocity imaging
1. [1]
  Junyang FENG , Xiaoli HAN , Yongjie SONG , Gang LI . Proton conduction and fluorescence properties of an ionic hydrogen-bonded organic framework constructed from dibromophthalic acid. Chinese Journal of Inorganic Chemistry, 2026, 42(4): 693-702. doi: 10.11862/CJIC.20250350
2. [2]
  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
3. [3]
  Xiaoqi LAN , Wei LI , Long JING , Mengyu SU , Xiaoling LUO , Zheng LIU , Qun TANG . Synthesis, crystal structure, and spectral properties of transition-metal-organic frameworks based on thiophene carboxylic acid ligands. Chinese Journal of Inorganic Chemistry, 2026, 42(2): 309-316. doi: 10.11862/CJIC.20250212
4. [4]
  Xiaoyang Li , Xiaowei Huang , Yimeng Zhang , Huan Liu , Shao Jin , Junpeng Zhuang . Comprehensive Chemical Experiments on the Synthesis of 1,3-Dibromo-5,5-Dimethylhydantoin and Its Application as a Brominating Reagent. University Chemistry, 2025, 40(7): 286-293. doi: 10.12461/PKU.DXHX202408035
5. [5]
  Jinyao Du , Xingchao Zang , Ningning Xu , Yongjun Liu , Weisi Guo . Electrochemical Thiocyanation of 4-Bromoethylbenzene. University Chemistry, 2024, 39(6): 312-317. doi: 10.3866/PKU.DXHX202310039
6. [6]
  Junqing WEN , Ruoqi WANG , Jianmin ZHANG . Regulation of photocatalytic hydrogen production performance in GaN/ZnO heterojunction through doping with Li and Au. Chinese Journal of Inorganic Chemistry, 2025, 41(5): 923-938. doi: 10.11862/CJIC.20240243
7. [7]
  Minwei Xie . Integrating Ideological and Political Education into Inorganic Chemistry: a Case on “Weak Acid Dissociation Equilibrium” in Environmental Science and Engineering. University Chemistry, 2025, 40(11): 24-30. doi: 10.12461/PKU.DXHX202412143
8. [8]
  Xiaoling LUO , Pintian ZOU , Xiaoyan WANG , Zheng LIU , Xiangfei KONG , Qun TANG , Sheng WANG . Synthesis, crystal structures, and properties of lanthanide metal-organic frameworks based on 2, 5-dibromoterephthalic acid ligand. Chinese Journal of Inorganic Chemistry, 2024, 40(6): 1143-1150. doi: 10.11862/CJIC.20230271
9. [9]
  Yinwu Su , Xuanwen Zheng , Jianghui Du , Boda Li , Tao Wang , Zhiyan Huang . Green Synthesis of 1,3-Dibromoacetone Using Halogen Exchange Method: Recommending a Basic Organic Synthesis Teaching Experiment. University Chemistry, 2024, 39(5): 307-314. doi: 10.3866/PKU.DXHX202311092
10. [10]
  Xueli Mu , Lingli Han , Tao Liu . Quantum Chemical Calculation Study on the E2 Elimination Reaction of Halohydrocarbon: Designing a Computational Chemistry Experiment. University Chemistry, 2025, 40(3): 68-75. doi: 10.12461/PKU.DXHX202404057
11. [11]
  Jianding LI , Junyang FENG , Huimin REN , Gang LI . Proton conductive properties of a Hf(Ⅳ)-based metal-organic framework built by 2,5-dibromophenyl-4,6-dicarboxylic acid. Chinese Journal of Inorganic Chemistry, 2025, 41(6): 1094-1100. doi: 10.11862/CJIC.20240464
12. [12]
  Yinuo Wang , Ziyu Liu , Hongxia Tan , Jun Tong , Dazhen Xu . Synthesis of Bromobenzoxazine: Introduce a Comprehensive Organic Chemistry Experiment Transformed from Undergraduate Research Innovation. University Chemistry, 2025, 40(10): 208-216. doi: 10.12461/PKU.DXHX202411077
13. [13]
  Xi YANG , Chunxiang CHANG , Yingpeng XIE , Yang LI , Yuhui CHEN , Borao WANG , Ludong YI , Zhonghao HAN . Co-catalyst Ni₃N supported Al-doped SrTiO₃: Synthesis and application to hydrogen evolution from photocatalytic water splitting. Chinese Journal of Inorganic Chemistry, 2025, 41(3): 440-452. doi: 10.11862/CJIC.20240371
14. [14]
  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
15. [15]
  Zhiming Feng , Lili Wu , Chengming Wang . Doubly Oxidized Carbene. University Chemistry, 2025, 40(9): 326-331. doi: 10.12461/PKU.DXHX202411008
16. [16]
  Yuyao Wang , Zhitao Cao , Zeyu Du , Xinxin Cao , Shuquan Liang . Research Progress of Iron-based Polyanionic Cathode Materials for Sodium-Ion Batteries. Acta Physico-Chimica Sinica, 2025, 41(4): 100035-0. doi: 10.3866/PKU.WHXB202406014
17. [17]
  Shuang Wang , Xiaoqi Fu , Shanshan Yao . Synergistic optimization of ion migration and electron transfer in sodium-ion battery cathode materials. Acta Physico-Chimica Sinica, 2026, 42(5): 100206-0. doi: 10.1016/j.actphy.2025.100206
18. [18]
  Wenjun Zheng . Application in Inorganic Synthesis of Ionic Liquids. University Chemistry, 2024, 39(8): 163-168. doi: 10.3866/PKU.DXHX202401020
19. [19]
  Guoze Yan , Bin Zuo , Shaoqing Liu , Tao Wang , Ruoyu Wang , Jinyang Bao , Zhongzhou Zhao , Feifei Chu , Zhengtong Li , Yamauchi Yusuke , Melhi Saad , Xingtao Xu . Opportunities and Challenges of Capacitive Deionization for Uranium Extraction from Seawater. Acta Physico-Chimica Sinica, 2025, 41(4): 100032-0. doi: 10.3866/PKU.WHXB202404006
20. [20]
  Jing Tan , Bo Zheng , Lingyan Gao . Application of Crown Ether-Based Artificial Ion Transporters. University Chemistry, 2026, 41(2): 232-237. doi: 10.12461/PKU.DXHX202501010

Get Citation

PDF

XML

Metrics

PDF Downloads(1737)
Abstract views(3662)
HTML views(41)

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