Velocity map imaging studies of the photodissociation of CS(2)by two-photon excitation at around 303-315 nm

Li, Zhenxing1; Zhao, Min1; Xie, Ting1; Chang, Yao2; Luo, Zijie2; Chen, Zhichao2; Wang, Xingan1; Yuan, Kaijun2; Yang, Xueming2,3

2020-09

10.1080/00268976.2020.1813911

MOLECULAR PHYSICS   影响因子和分区

0026-8976

1362-3028

Two-photon dissociation dynamics of carbon disulfide (CS2) have been studied by using the time-sliced velocity map ion imaging technique. Images of the S (D-1(2)) and S (P-3(0)) photoproducts formed in the CS(2)photodissociation are acquired at four photolysis wavelengths from 303 nm to 315 nm. Vibrational states of the CS co-products are partially resolved and identified in the images. The CS (X-1 sigma(+)) products are highly vibrationally excited with moderate rotational excitation. The spin-orbit state-specific dissociation dynamics are also investigated by measuring the images of three S (P-3(J)) spin-orbit states (J=0, 1, and 2) at photolysis wavelength 303.878 nm. The branching ratios of CS (a(3)phi)/CS (X-1 sigma(+)(g)) are determined to be 0.05 +/- 0.02, 0.17 +/- 0.04, and 0.26 +/- 0.05 for the three spin-orbit states S (P-3(0)), S (P-3(1)), and S (P-3(2)) respectively, implying a strong spin-orbit coupling exists in the dissociation process. The averaged anisotropy parameters beta(2)>0 and beta(4)similar to 0 suggest that the CS(2)molecules undergo a sequential transition 2(1)B(2)(2(1)sigma(+))<- 1(1)B(2)((1)Delta(u))<- X-1 sigma(+)(g)with the intermediate state 1(1)B(2)having a long lifetime, followed by nonadiabatic and spin-orbit couplings to other electronic states and then dissociate.

Photodissociation velocity map ion imaging two-photon excitation

SCI ; EI

英语

通讯

Strategic Priority Research Program of the Chinese Academy of Sciences[XDB17000000] ; Chemical Dynamics Research Center[21688102] ; National Natural Science Foundation of China (NSFC)[21873099][21922306] ; Key Technology Team of the Chinese Academy of Sciences[GJJSTD20190002] ; Chinese Academy of Sciences[121421KYSB20170012]

Chemistry ; Physics

Chemistry, Physical ; Physics, Atomic, Molecular & Chemical

WOS:000566911300001

TAYLOR & FRANCIS LTD

20203609143607

Spin dynamics ; Carbon disulfide ; Photons ; Photolysis

Physical Chemistry:801.4 ; Chemical Reactions:802.2 ; Inorganic Compounds:804.2 ; Atomic and Molecular Physics:931.3

PHYSICS

Web of Science

1.Univ Sci & Technol China, Sch Chem & Mat Sci, Dept Chem Phys, Hefei 230026, Anhui, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, 457 Zhongshan Rd, Dalian 116023, Peoples R China
3.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Peoples R China

Li, Zhenxing,Zhao, Min,Xie, Ting,et al. Velocity map imaging studies of the photodissociation of CS(2)by two-photon excitation at around 303-315 nm[J]. MOLECULAR PHYSICS,2020,119(1-2).

Li, Zhenxing.,Zhao, Min.,Xie, Ting.,Chang, Yao.,Luo, Zijie.,...&Yang, Xueming.(2020).Velocity map imaging studies of the photodissociation of CS(2)by two-photon excitation at around 303-315 nm.MOLECULAR PHYSICS,119(1-2).

Li, Zhenxing,et al."Velocity map imaging studies of the photodissociation of CS(2)by two-photon excitation at around 303-315 nm".MOLECULAR PHYSICS 119.1-2(2020).