State-to-state photodissociation dynamics of CO2 at 157 nm

Zhang, Zhiguo1,2,3; Xin, Min1,2; Xin, Yu1,2,5; Zhao, Shutao1,2; Jin, Yanling3; Wu, Guorong3; Dai, Dongxu3; Chen, Zhichao3; Sakkoula, Evangelia4; Parker, David H.4; Yuan, Kaijun3,6; Yang, Xueming3,6,7

2022-10-19

10.1039/d2cp04020d

PHYSICAL CHEMISTRY CHEMICAL PHYSICS   Impact Factor & Quartile

1463-9076

1463-9084

State-to-state photodissociation of CO2(v(2) = 0 and 1) at 157 nm via the O(D-1) + CO(X-1 sigma(+)) channel was studied by using the sliced velocity map imaging technique. Both the O(D-1) and CO(X-1 sigma(+)) products were detected by (2 + 1) resonance enhanced multiphoton ionization (REMPI). Detection of CO via the B-1 sigma(+) <-<- X-1 sigma(+) transition allowed ro-vibrational state-selective detection, and combined with imaging, the fragment energy and angular distributions have been derived. For CO(v = 0 and 1|j) products from the CO2(v(2) = 0) molecule, the angular distributions of low-j CO display positive anisotropic parameters (about 0.8); with j increasing, the product anisotropic parameters gradually reduce to zero. While for CO(v = 0 and 1|j) products from the vibrational excited CO2(v(2) = 1) molecule, the angular distributions of low-j CO also display positive anisotropic parameters; with j increasing, the product anisotropic parameters first decrease to zero and then become negative (about -0.5). Experimental results show that the observed variation of the product angular distribution with the rotational quantum number of CO is consistent with trends predicted by a classical model for non-axial fragment recoil. The results support advanced theoretical predictions of a predominantly parallel transition to the bent 2(1)A ' excited state of CO2, where bending introduces torque during the direct dissociation process.

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Open Foundation of the State Key Laboratory of Molecular Reaction Dynamics in DICP, CAS["SKLMRD-K202209","SKLMRD-K202121"] ; Open Foundation of Key Laboratory of Functional Materials and Devices for Informatics of Anhui Higher Education Institutes[FMDI202104] ; National Natural Science Foundation of China[21773236] ; Natural Science Research Project of Education Department of Anhui Province["KJ2020A0544","KJ2019A0521"] ; Innovation Program for Quantum Science and Technology[2021ZD0303304] ; Liaoning Revitalization Talents Program[XLYC1907154] ; EU[642820] ; Dutch National Science foundation NWO[648.000.024]

Chemistry ; Physics

Chemistry, Physical ; Physics, Atomic, Molecular & Chemical

WOS:000869851000001

ROYAL SOC CHEMISTRY

CHEMISTRY

Web of Science

1.Fuyang Normal Univ, Key Lab Funct Mat & Devices Informat Anhui Higher, Fuyang 236037, Anhui, Peoples R China
2.Fuyang Normal Univ, Sch Phys & Elect Engn, Fuyang 236037, Anhui, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Liaoning, Peoples R China
4.Univ Nijmegen, Dept Mol & Laser Phys, NL-6525 ED Nijmegen, Netherlands
5.Hefei Univ Technol, Dept Civil Engn, Hefei 230009, Peoples R China
6.Hefei Natl Lab, Hefei 230088, Peoples R China
7.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Peoples R China

Zhang, Zhiguo,Xin, Min,Xin, Yu,et al. State-to-state photodissociation dynamics of CO2 at 157 nm[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2022,24(40).

Zhang, Zhiguo.,Xin, Min.,Xin, Yu.,Zhao, Shutao.,Jin, Yanling.,...&Yang, Xueming.(2022).State-to-state photodissociation dynamics of CO2 at 157 nm.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,24(40).

Zhang, Zhiguo,et al."State-to-state photodissociation dynamics of CO2 at 157 nm".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 24.40(2022).