Photodissociation Dynamics of C2H4BrCl:Nonadiabatic Dynamics with Intrinsic Cs Symmetry

Bulletin of the Korean chemical society

Kiryong Hong¹  Dababrata Paul¹  Kwang Woo Jung¹  Tae Kyu Kim¹  Ha Na Cho¹  Kyoung Seok Lee¹ 

关键词: Photodissociation dynamics;    Alkyl halides;    Curve-crossing;    Cs symmetry;    Ion-imaging;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

The photodissociation dynamics of 1,2-bromochloroethane (C₂H₄BrCl) was investigated near 234 nm. A two-dimensional photofragment ion-imaging technique coupled with a [2+1] resonance-enhanced multiphoton ionization scheme was utilized to obtain speed and angular distributions of the nascent Br(²P_3/2) and Br*(²P_1/2) atoms. The total translational energy distributions for the Br and Br* channels were well characterized by Gaussian functions with average translational energies of 100 and 84 kJ/mol, respectively. The recoil anisotropies for the Br and Br* channels were measured to be �? = 0.49 �? 0.05 for Br and 1.55 �? 0.05 for Br*. The relative quantum yield for Br* was found to be �?_Br* = 0.33 �? 0.03. The probability of nonadiabatic transition between A` states was estimated to be 0.46. The relevant nonadiabatic dynamics is discussed in terms of interaction between potential energy surfaces in C_s symmetry.

【 授权许可】

Unknown