| 2-溴丁烷光解离的离子速度成像方法 |
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| 引用本文： | 周丹娜,茆锐,张立敏,张群,陈旸. 2-溴丁烷光解离的离子速度成像方法[J]. 化学物理学报, 2011, 24(6): 647-652 |
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| 作者姓名： | 周丹娜 茆锐 张立敏 张群 陈旸 |
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| 作者单位： | 中国科学技术大学合肥微尺度物质科学国家实验室，化学物理系，合肥230026;中国科学技术大学合肥微尺度物质科学国家实验室，化学物理系，合肥230026;中国科学技术大学合肥微尺度物质科学国家实验室，化学物理系，合肥230026;中国科学技术大学合肥微尺度物质科学国家实验室，化学物理系，合肥230026;中国科学技术大学合肥微尺度物质科学国家实验室，化学物理系，合肥230026 |
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| 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3Q0、3Q
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| 关 键 词： | 离子速度成像，光解离 |
| 收稿时间： | 2011-08-19 |
Photodissociation of 2-Bromobutane by Ion-velocity Map Imaging Technique |
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| Dan-na Zhou,Rui Mao,Li-min Zhang,Qun Zhang and Yang Chen. Photodissociation of 2-Bromobutane by Ion-velocity Map Imaging Technique[J]. Chinese Journal of Chemical Physics, 2011, 24(6): 647-652 |
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| Authors: | Dan-na Zhou Rui Mao Li-min Zhang Qun Zhang Yang Chen |
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| Affiliation: | Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China;Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China;Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China;Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China;Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China |
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| 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. |
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| Keywords: | Ion-velocity imaging Photodissociation 2-bromobutane |
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