Tang Ying, Ji Lei, Zhu Rongshu, Wei Zhengrong, Zhang Bing
State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, PR China.
J Phys Chem A. 2005 Dec 15;109(49):11123-6. doi: 10.1021/jp0537097.
The photodissociation of 1,3-dibromopropane has been studied at 234 nm using a 2D photofragment ion velocity imaging technique coupled with a [2 + 1] resonance-enhanced multiphoton ionization scheme. The velocity distributions for the Br (2P1/2) (denoted Br) and Br (2P3/2) (denoted Br) fragments are determined, and each can be fitted by a narrow single-peaked Gaussian curve, suggesting that bromine fragments are generated as a result of direct dissociation via repulsive potential energy surfaces. The recoil anisotropies were measured to be beta = 0.80 for Br and 1.31 for Br, and the product relative quantum yields at 234 nm is Phi234 nm(Br) = 0.21.
采用二维光碎片离子速度成像技术结合[2 + 1]共振增强多光子电离方案，在234 nm波长下研究了1,3 - 二溴丙烷的光解离。测定了Br(2P1/2)（记为Br）和Br(2P3/2)（记为Br）碎片的速度分布，且每一个分布都可以用一条窄的单峰高斯曲线拟合，这表明溴碎片是通过排斥势能面直接解离产生的。测得Br的反冲各向异性为β = 0.80，Br的为1.31，234 nm处产物的相对量子产率为Phi234 nm(Br) = 0.21。
