Photodissociation study of CO2 on the formation of state-correlated CO((XS)-S-1???????(+), v) with O(P-3(2)) photoproducts in the low energy band centered at 148 nm

Liu, Qian1; Li, Zheng1; Liu, Peng1; Yang, Wenshao1; Yang, Xueming1,2,3; Yu, Shengrui1

2023-03-07

10.1063/5.0139678

JOURNAL OF CHEMICAL PHYSICS   Impact Factor & Quartile

0021-9606

1089-7690

The spin-forbidden O(P-3(2)) + CO(X-1 sigma(+), v) channel formed from the photodissociation of CO2 in the low energy band centered at 148 nm is investigated by using the time-sliced velocity-mapped ion imaging technique. The vibrational-resolved images of the O(P-3(2)) photoproducts measured in the photolysis wavelength range of 144.62-150.45 nm are analyzed to give the total kinetic energy releases (TKER) spectra, CO(X-1 sigma(+)) vibrational state distributions, and anisotropy parameters (beta). The TKER spectra reveal the formation of correlated CO(X-1 sigma(+)) with well resolved v = 0-10 (or 11) vibrational bands. Several high vibrational bands that were observed in the low TKER region for each studied photolysis wavelength exhibit a bimodal structure. The CO(X-1 sigma(+), v) vibrational distributions all present inverted characteristics, and the most populated vibrational state changes from a low vibrational state to a relatively higher vibrational state with a change in the photolysis wavelength from 150.45 to 144.62 nm. However, the vibrational-state specific beta-values for different photolysis wavelengths present a similar variation trend. The measured beta-values show a significant bulge at the higher vibrational levels, in addition to the overall slow decreasing trend. The observed bimodal structures with mutational beta-values for the high vibrational excited state CO((1)sigma(+)) photoproducts suggest the existence of more than one nonadiabatic pathway with different anisotropies in the formation of O(P-3(2)) + CO(X-1 sigma(+), v) photoproducts across the low energy band.

SCI

English

Others

Zhejiang Provincial Natural Science Foundation of China["LY22B030005","LZ22B030003"] ; National Natural Science Foundation of China["22173082","21773213"]

Chemistry ; Physics

Chemistry, Physical ; Physics, Atomic, Molecular & Chemical

WOS:000942108500014

AIP Publishing

CHEMISTRY

Web of Science

1.Zhejiang Normal Univ, Hangzhou Inst Adv Studies, 1108 Gengwen Rd, Hangzhou 311231, Zhejiang, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, 457 Zhongshan Rd, Dalian 116023, Liaoning, Peoples R China
3.Southern Univ Sci & Technol, Coll Sci, Dept Chem, 1088 Xueyuan Rd, Shenzhen 518055, Peoples R China

Liu, Qian,Li, Zheng,Liu, Peng,et al. Photodissociation study of CO2 on the formation of state-correlated CO((XS)-S-1???????(+), v) with O(P-3(2)) photoproducts in the low energy band centered at 148 nm[J]. JOURNAL OF CHEMICAL PHYSICS,2023,158(9).

Liu, Qian,Li, Zheng,Liu, Peng,Yang, Wenshao,Yang, Xueming,&Yu, Shengrui.(2023).Photodissociation study of CO2 on the formation of state-correlated CO((XS)-S-1???????(+), v) with O(P-3(2)) photoproducts in the low energy band centered at 148 nm.JOURNAL OF CHEMICAL PHYSICS,158(9).

Liu, Qian,et al."Photodissociation study of CO2 on the formation of state-correlated CO((XS)-S-1???????(+), v) with O(P-3(2)) photoproducts in the low energy band centered at 148 nm".JOURNAL OF CHEMICAL PHYSICS 158.9(2023).