引用本文:
【打印本页】   【HTML】   【下载PDF全文】   View/Add Comment  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 1094次   下载 1105 本文二维码信息
码上扫一扫!
分享到: 微信 更多
Photodissociation of 2-Bromobutane by Ion-velocity Map Imaging Technique
Dan-na Zhou,Rui Mao,Li-min Zhang*,Qun Zhang*,Yang Chen*
Author NameAffiliationE-mail
Dan-na Zhou Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China  
Rui Mao Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China  
Li-min Zhang* Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China lmzha@ustc.edu.cn 
Qun Zhang* Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China qunzh@ustc.edu.cn 
Yang Chen* Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China yangchen@ustc.edu.cn 
Abstract:
The photodissociation dynamics of 2-bromobutane has been investigated at 233.62 and 233.95 nm by ion-velocity map imaging technique coupled with resonance-enhanced mul-tiphoton ionization. The speed and angular distribution of Br and Br* fragments were determined from the map images. The two Gaussian components, shown in the speed dis-tributions of Br and Br* atoms, are suggested to attribute to the two independent reaction paths of photodissociation for 2-bromobutane at 233.62 and 233.95 nm. The high-energy component is related to the prompt dissociation along the C-Br stretching mode, and the low-energy component to the dissociation from the repulsive mode with bending and C-Br stretching combination. The contributions of the excited 3Q0, 3Q1, and 1Q1 states to the products (Br and Br*) were discussed. Relative quantum yield of 0.924 for Br(2P3/2) at about 234 nm in the photodissociation of 2-bromobutane is derived.
Key words:  Ion-velocity imaging, Photodissociation, 2-bromobutane
FundProject:
2-溴丁烷光解离的离子速度成像方法
周丹娜,茆锐,张立敏*,张群*,陈旸*
摘要:
用离子速度成像结合共振增强多光子电离技术研究了2-溴丁烷在233.62和233.95 nm的光解离动力学. 从离子速度图像确定了光解产物Br和Br*碎片的速度分布和角度分布. Br和Br¤速度分布中包含的两个高斯分量是来自于2-溴丁烷在约234 nm处的两个独立的光解离反应通道. 高能的高斯分量对应于沿着C-Br伸缩模式的直接解离,低能的高斯分量对应于弯曲振动和C?Br伸缩振动耦合形成的排斥模式的解离. 讨论了2-溴丁烷光解离中3Q03Q
关键词:  离子速度成像,光解离
DOI:10.1088/1674-0068/24/06/647-652
分类号: