Home

Citation: ZHANG Feng, WANG Yan-Mei, ZHANG Bing, FENG Wen-Lin. Photolysis of n-C₃H₇I and i-C₃H₇I at 266 nm: Effect of Alkyl Radical Branching on the Dissociation Dynamics of the C—I Bond[J]. Acta Physico-Chimica Sinica, ;2010, 26(07): 1903-1908. doi: 10.3866/PKU.WHXB20100630 shu

Photolysis of n-C₃H₇I and i-C₃H₇I at 266 nm: Effect of Alkyl Radical Branching on the Dissociation Dynamics of the C—I Bond

1.
School of Optoelectronic Information, Chongqing University of Technology, Chongqing 400051, P. R. China
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 University of Chinese Academy of Sciences, Beijing 100049, P. R. China

Received Date: 2 March 2010
Available Online: 4 May 2010

Photodissociation dynamics of n-C3H7I and i-C3H7I at 266 nm were investigated using an ion imaging technique combined with resonance enhanced multiphoton ionization (REMPI). Information on energy disposal and a nonadiabatic transition between the dissociative electronic states involved in the photodissociation of both molecules were analyzed and compared. The fraction of internal energy in the I channel is greater than that in the I* channel for both molecules. As the alkyl group becomes more branched the energy distribution of the atom fragments (I and I*) becomes obviously wider suggesting that the alkyl radical at the α-carbon atomhas more complicated models of the ro-vibration models. On the other hand, the relative oscillator strengths of these molecules that were pumped using 266 nm photons show a small difference in the 3Q0←X transition. The probability of yielding an I* fragment decreases markedly from 0.72 for n-C3H7I to 0.46 for i-C3H7I. This is attributed to the greater contribution of the bending modes for I and I* during the photodissociation of i-C3H7I than that of n-C3H7I leading to an enhancement of the nonadiabatic transition between the 3Q0 and 1Q1 states. Additionally, the 3Q0←X transition is not a completely parallel transition for both molecules and the angle between the transition dipole moment and the bond axis is estimated to be about 15° for n-C3H7I and 18° for i-C3H7I, respectively.
- Photodissociation dynamics,
- n-C3H7I,
- i-C3H7I,
- Ion imaging
1. [1]
  You Wu , Chang Cheng , Kezhen Qi , Bei Cheng , Jianjun Zhang , Jiaguo Yu , Liuyang Zhang . ZnO/D-A共轭聚合物S型异质结高效光催化产H₂O₂及其电荷转移动力学研究. Acta Physico-Chimica Sinica, 2024, 40(11): 2406027-. doi: 10.3866/PKU.WHXB202406027
2. [2]
  Tong Li , Leping Pan , Yan Zhang , Jihu Su , Kai Li , Kuiliang Li , Hu Chen , Qi Sun , Zhiyong Wang . Electrochemical construction of 2,5-diaryloxazoles via N–H and C(sp³)-H functionalization. Chinese Chemical Letters, 2024, 35(4): 108897-. doi: 10.1016/j.cclet.2023.108897
3. [3]
  Shulei Hu , Yu Zhang , Xiong Xie , Luhan Li , Kaixian Chen , Hong Liu , Jiang Wang . Rh(Ⅲ)-catalyzed late-stage C-H alkenylation and macrolactamization for the synthesis of cyclic peptides with unique Trp(C7)-alkene crosslinks. Chinese Chemical Letters, 2024, 35(8): 109408-. doi: 10.1016/j.cclet.2023.109408
4. [4]
  Jing JIN , Zhuming GUO , Zhiyin XIAO , Xiujuan JIANG , Yi HE , Xiaoming LIU . Tuning the stability and cytotoxicity of fac-[Fe(CO)₃I₃]^- anion by its counter ions: From aminiums to inorganic cations. Chinese Journal of Inorganic Chemistry, 2024, 40(5): 991-1004. doi: 10.11862/CJIC.20230458
5. [5]
  Wei Zhong , Dan Zheng , Yuanxin Ou , Aiyun Meng , Yaorong Su . K原子掺杂高度面间结晶的g-C₃N₄光催化剂及其高效H₂O₂光合成. Acta Physico-Chimica Sinica, 2024, 40(11): 2406005-. doi: 10.3866/PKU.WHXB202406005
6. [6]
  Guoqiang Chen , Zixuan Zheng , Wei Zhong , Guohong Wang , Xinhe Wu . 熔融中间体运输导向合成富氨基g-C₃N₄纳米片用于高效光催化产H₂O₂. Acta Physico-Chimica Sinica, 2024, 40(11): 2406021-. doi: 10.3866/PKU.WHXB202406021
7. [7]
  Kexin Dong , Chuqi Shen , Ruyu Yan , Yanping Liu , Chunqiang Zhuang , Shijie Li . Integration of Plasmonic Effect and S-Scheme Heterojunction into Ag/Ag₃PO₄/C₃N₅ Photocatalyst for Boosted Photocatalytic Levofloxacin Degradation. Acta Physico-Chimica Sinica, 2024, 40(10): 2310013-. doi: 10.3866/PKU.WHXB202310013
8. [8]
  Haoran Shi , Jiaxin Wang , Yuqin Zhu , Hongyang Li , Guodong Ju , Lanlan Zhang , Chao Wang . Highly selective α-C(sp³)-H arylation of alkenyl amides via nickel chain-walking catalysis. Chinese Chemical Letters, 2024, 35(7): 109333-. doi: 10.1016/j.cclet.2023.109333
9. [9]
  Yujia Shi , Yan Qiao , Pengfei Xie , Miaomiao Tian , Xingwei Li , Junbiao Chang , Bingxian Liu . Rhodium-catalyzed enantioselective in situ C(sp³)−H heteroarylation by a desymmetrization approach. Chinese Chemical Letters, 2024, 35(10): 109544-. doi: 10.1016/j.cclet.2024.109544
10. [10]
  Ke-Ai Zhou , Lian Huang , Xing-Ping Fu , Li-Ling Zhang , Yu-Ling Wang , Qing-Yan Liu . Fluorinated metal-organic framework for methane purification from a ternary CH4/C2H6/C3H8 mixture. Chinese Journal of Structural Chemistry, 2023, 42(11): 100172-100172. doi: 10.1016/j.cjsc.2023.100172
11. [11]
  Shule Liu . Application of SPC/E Water Model in Molecular Dynamics Teaching Experiments. University Chemistry, 2024, 39(4): 338-342. doi: 10.3866/PKU.DXHX202310029
12. [12]
  Yaling Chen . Basic Theory and Competitive Exam Analysis of Dynamic Isotope Effect. University Chemistry, 2024, 39(8): 403-410. doi: 10.3866/PKU.DXHX202311093
13. [13]
  Heng Chen , Longhui Nie , Kai Xu , Yiqiong Yang , Caihong Fang . 两步焙烧法制备大比表面积和结晶性增强超薄g-C₃N₄纳米片及其高效光催化产H₂O₂. Acta Physico-Chimica Sinica, 2024, 40(11): 2406019-. doi: 10.3866/PKU.WHXB202406019
14. [14]
  Zeyuan WANG , Songzhi ZHENG , Hao LI , Jingbo WENG , Wei WANG , Yang WANG , Weihai SUN . Effect of I₂ interface modification engineering on the performance of all-inorganic CsPbBr₃ perovskite solar cells. Chinese Journal of Inorganic Chemistry, 2024, 40(7): 1290-1300. doi: 10.11862/CJIC.20240021
15. [15]
  Yuemin Chen , Yunqi Wu , Guoao Wang , Feihu Cui , Haitao Tang , Yingming Pan . Electricity-driven enantioselective cross-dehydrogenative coupling of two C(sp³)-H bonds enabled by organocatalysis. Chinese Chemical Letters, 2024, 35(9): 109445-. doi: 10.1016/j.cclet.2023.109445
16. [16]
  Dong-Xue Jiao , Hui-Li Zhang , Chao He , Si-Yu Chen , Ke Wang , Xiao-Han Zhang , Li Wei , Qi Wei . Layered (C5H6ON)2[Sb2O(C2O4)3] with a large birefringence derived from the uniform arrangement of π-conjugated units. Chinese Journal of Structural Chemistry, 2024, 43(6): 100304-100304. doi: 10.1016/j.cjsc.2024.100304
17. [17]
  Ya-Wen Zhang , Ming-Ming Gan , Li-Ying Sun , Ying-Feng Han . Supramolecular dinuclear silver(I) and gold(I) tetracarbene metallacycles and fluorescence sensing of penicillamine. Chinese Journal of Structural Chemistry, 2024, 43(9): 100356-100356. doi: 10.1016/j.cjsc.2024.100356
18. [18]
  Jianbao Mei , Bei Li , Shu Zhang , Dongdong Xiao , Pu Hu , Geng Zhang . Enhanced Performance of Ternary NASICON-Type Na_3.5-xMn_0.5V_1.5-xZr_x(PO₄)₃/C Cathodes for Sodium-Ion Batteries. Acta Physico-Chimica Sinica, 2024, 40(12): 2407023-. doi: 10.3866/PKU.WHXB202407023
19. [19]
  Jinfu Ma , Hui Lu , Jiandong Wu , Zhongli Zou . Teaching Design of Electrochemical Principles Course Based on “Cognitive Laws”: Kinetics of Electron Transfer Steps. University Chemistry, 2024, 39(3): 174-177. doi: 10.3866/PKU.DXHX202309052
20. [20]
  Yeyun Zhang , Ling Fan , Yanmei Wang , Zhenfeng Shang . Development and Application of Kinetic Reaction Flasks in Physical Chemistry Experimental Teaching. University Chemistry, 2024, 39(4): 100-106. doi: 10.3866/PKU.DXHX202308044

Get Citation

PDF

XML

Metrics

PDF Downloads(1090)
Abstract views(2669)
HTML views(64)

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

Photolysis of n-C3H7I and i-C3H7I at 266 nm: Effect of Alkyl Radical Branching on the Dissociation Dynamics of the C—I Bond

Metrics

通讯作者: 陈斌, bchen63@163.com

Photolysis of n-C₃H₇I and i-C₃H₇I at 266 nm: Effect of Alkyl Radical Branching on the Dissociation Dynamics of the C—I Bond