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Hou S, Wang Z, Xie C. Full-dimensional potential energy surface for the photodissociation of HNCO via its S 1 band. Phys Chem Chem Phys 2023; 25:29556-29565. [PMID: 37877344 DOI: 10.1039/d3cp03703g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2023]
Abstract
A full-dimensional potential energy surface (PES) for the first excited state S1(1A'') of HNCO has been built up by the neural network method based on more than 36 000 ab initio points, which were calculated at the multireference configuration interaction level with Davidson correction using the augmented correlation consistent polarized valence triple zeta basis set. It was found that two minima, namely, trans and cis isomers of HNCO, and another seven stationary points exist on the S1 PES for the two dissociation pathways: HNCO(S1) → H + NCO/NH + CO. Particularly, a new out-of-plane transition state between the two minima was found in this work, thanks to including all the degree of freedoms for this system. The adiabatic excitation energy of the S1(1A'') ← S0(1A') transition and dissociation energies D0(HNCO → H + NCO) and D0((HNCO →NH(a1Δ) + CO) calculated on the PES are in good agreement with experimental results. In addition, based on the newly constructed S1 PES, the percentage of products H + NCO in the photodissociation of HNCO(S1) was obtained by a quasi-classical trajectory method at the photon wavelengths ranging from 190 to 225 nm, which is in reasonably good agreement with earlier theoretical and experimental results. For the dissociation lifetimes of the trajectories, they were calculated to be less than 5 ps, which is also consistent with experimental observations.
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Affiliation(s)
- Siting Hou
- Institute of Modern Physics, Shaanxi Key Laboratory for Theoretical Physics Frontiers, Northwest University, Xi'an, Shaanxi 710127, China.
| | - Zhimo Wang
- Institute of Modern Physics, Shaanxi Key Laboratory for Theoretical Physics Frontiers, Northwest University, Xi'an, Shaanxi 710127, China.
| | - Changjian Xie
- Institute of Modern Physics, Shaanxi Key Laboratory for Theoretical Physics Frontiers, Northwest University, Xi'an, Shaanxi 710127, China.
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Xie T, Su S, Yu S, Luo Z, Chen Z, Wang X, Yuan K, Yang X. VUV photodissociation of DNCO: dynamics of the D atom elimination channel. Mol Phys 2021. [DOI: 10.1080/00268976.2020.1821923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Ting Xie
- Hefei National Laboratory for Materials Science at the Microscale and Department of Chemical Physics, University of Science and Technology of China, Hefei, People’s Republic of China
| | - Shu Su
- State key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, People’s Republic of China
| | - Shengrui Yu
- Hangzhou Institute of Advanced Studies, Zhejiang Normal University, Hangzhou, People’s Republic of China
| | - Zijie Luo
- State key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, People’s Republic of China
| | - Zhichao Chen
- State key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, People’s Republic of China
| | - Xingan Wang
- Hefei National Laboratory for Materials Science at the Microscale and Department of Chemical Physics, University of Science and Technology of China, Hefei, People’s Republic of China
| | - Kaijun Yuan
- State key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, People’s Republic of China
| | - Xueming Yang
- State key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, People’s Republic of China
- Department of Chemistry, College of Science, Southern University of Science and Technology, Shenzhen, People’s Republic of China
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Su S, Chen Z, Chen ZC, Wu GR, Dai DX, Yuan KJ, Yang XM. Ultraviolet photodissociation dynamics of DNCO + hν → D + NCO: Two competitive pathways. CHINESE J CHEM PHYS 2019. [DOI: 10.1063/1674-0068/cjcp1904074] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Shu Su
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhen Chen
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhi-chao Chen
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Dalian 116023, China
| | - Guo-rong Wu
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Dalian 116023, China
| | - Dong-xu Dai
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Dalian 116023, China
| | - Kai-jun Yuan
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Dalian 116023, China
| | - Xue-ming Yang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Dalian 116023, China
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Zhang ZG, Xin M, Wu YN, Zhao ST, Tang YJ, Chen Y. Imaging HNCO photodissociation at 201 nm: State-to-state correlations between CO (X1Σ+) and NH (a1Δ). CHINESE J CHEM PHYS 2018. [DOI: 10.1063/1674-0068/31/cjcp1808192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Zhi-guo Zhang
- School of Physics and Electronic Engineering, Fuyang Normal University, Fuyang 236041, China
| | - Min Xin
- School of Physics and Electronic Engineering, Fuyang Normal University, Fuyang 236041, China
| | - Yan-ning Wu
- School of Physics and Electronic Engineering, Fuyang Normal University, Fuyang 236041, China
| | - Shu-tao Zhao
- School of Physics and Electronic Engineering, Fuyang Normal University, Fuyang 236041, China
| | - Yi-jia Tang
- School of Physics and Electronic Engineering, Fuyang Normal University, Fuyang 236041, China
| | - Yang Chen
- Department of Chemical Physics and Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
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Zhang ZG, Xin M, Zhao ST, Chen Y. Imaging Isocyanic Acid Photodissociation at 193 nm: the NH( a1Δ)+CO( X1Σ +) Channel. CHINESE J CHEM PHYS 2018. [DOI: 10.1063/1674-0068/31/cjcp1706120] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Zhi-guo Zhang
- School of Physics and Electronic Engineering, Fuyang Normal University, Fuyang 236041, China
| | - Min Xin
- School of Physics and Electronic Engineering, Fuyang Normal University, Fuyang 236041, China
| | - Shu-tao Zhao
- School of Physics and Electronic Engineering, Fuyang Normal University, Fuyang 236041, China
| | - Yang Chen
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
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6
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Császár AG. Anharmonic molecular force fields. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2011. [DOI: 10.1002/wcms.75] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Rocher-Casterline BE, Mollner AK, Ch’ng LC, Reisler H. Imaging H2O Photofragments in the Predissociation of the HCl−H2O Hydrogen-Bonded Dimer. J Phys Chem A 2011; 115:6903-9. [DOI: 10.1021/jp112024s] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Blithe E. Rocher-Casterline
- Department of Chemistry, University of Southern California, Los Angeles, California 90089-0482, United States
| | - Andrew K. Mollner
- Department of Chemistry, University of Southern California, Los Angeles, California 90089-0482, United States
| | - Lee C. Ch’ng
- Department of Chemistry, University of Southern California, Los Angeles, California 90089-0482, United States
| | - Hanna Reisler
- Department of Chemistry, University of Southern California, Los Angeles, California 90089-0482, United States
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Casterline BE, Mollner AK, Ch’ng LC, Reisler H. Imaging the State-Specific Vibrational Predissociation of the Hydrogen Chloride−Water Hydrogen-Bonded Dimer. J Phys Chem A 2010; 114:9774-81. [DOI: 10.1021/jp102532m] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Blithe E. Casterline
- Department of Chemistry, University of Southern California, Los Angeles, California 90089-0482
| | - Andrew K. Mollner
- Department of Chemistry, University of Southern California, Los Angeles, California 90089-0482
| | - Lee C. Ch’ng
- Department of Chemistry, University of Southern California, Los Angeles, California 90089-0482
| | - Hanna Reisler
- Department of Chemistry, University of Southern California, Los Angeles, California 90089-0482
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Li G, Parr J, Fedorov I, Reisler H. Imaging study of vibrational predissociation of the HCl–acetylene dimer: pair-correlated distributions. Phys Chem Chem Phys 2006; 8:2915-24. [PMID: 16880903 DOI: 10.1039/b603107b] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The state-to-state predissociation dynamics of the HCl-acetylene dimer were studied following excitation in the asymmetric C-H (asym-CH) stretch and the HCl stretch. Velocity map imaging (VMI) and resonance enhanced multiphoton ionization (REMPI) were used to determine pair-correlated product energy distributions. Different vibrational predissociation mechanisms were observed for the two excited vibrational levels. Following excitation in the of the asym-CH stretch fundamental, HCl fragments in upsilon = 0 and j = 4-7 were observed and no HCl in upsilon = 1 was detected. The fragments' center-of-mass (c.m.) translational energy distributions were derived from images of HCl (j = 4-7), and were converted to rotational state distributions of the acetylene co-fragment by assuming that acetylene is generated with one quantum of C-C stretch (nu(2)) excitation. The acetylene pair-correlated rotational state distributions agree with the predictions of the statistical phase space theory, restricted to acetylene fragments in 1nu(2). It is concluded that the predissociation mechanism is dominated by the initial coupling of the asym-CH vibration to a combination of C-C stretch and bending modes in the acetylene moiety. Vibrational energy redistribution (IVR) between acetylene bending and the intermolecular dimer modes leads to predissociation that preserves the C-C stretch excitation in the acetylene product while distributing the rest of the available energy statistically. The predissociation mechanism following excitation in the Q band of the dimer's HCl stretch fundamental was quite different. HCl (upsilon = 0) rotational states up to j = 8 were observed. The rovibrational state distributions in the acetylene co-fragment derived from HCl (j = 6-8) images were non-statistical with one or two quanta in acetylene bending vibrational excitation. From the observation that all the HCl(j) translational energy distributions were similar, it is proposed that there exists a constraint on conversion of linear to angular momentum during predissociation. A dimer dissociation energy of D(0) = 700 +/- 10 cm(-1) was derived.
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Affiliation(s)
- Guosheng Li
- Department of Chemistry, University of Southern California, Los Angeles, CA 90089-0482, USA
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SenGupta S, Upadhyaya HP, Kumar A, Naik PD, Bajaj P. Detection of OH radical in laser induced photodissociation of tetrahydrofuran at 193nm. J Chem Phys 2005; 122:124309. [PMID: 15836380 DOI: 10.1063/1.1867354] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
On excitation at 193 nm, tetrahydrofuran (THF) generates OH as one of the photodissociation products. The nascent energy state distribution of the OH radical was measured employing laser induced fluorescence technique. It is observed that the OH radical is formed mostly in the ground vibrational level, with low rotational excitation (approximately 3%). The rotational distribution of OH (v"=0,J) is characterized by rotational temperature of 1250+/-140 K. Two spin-orbit states, 2Pi3/2 and 2Pi1/2 of OH are populated statistically. But, there is a preferential population in Lambda doublet levels. For all rotational numbers, the 2Pi+(A') levels are preferred to the 2Pi-(A") levels. The relative translational energy associated with the photoproducts in the OH channel is calculated to be 17.4+/-2.2 kcal mol-1, giving an fT value of approximately 36%, and the remaining 61% of the available energy is distributed in the internal modes of the other photofragment, i.e., C4H7. The observed distribution of the available energy agrees well with a hybrid model of energy partitioning, predicting an exit barrier of approximately 16 kcal mol-1. Based on both ab initio molecular orbital calculations and experimental results, a plausible mechanism for OH formation is proposed. The mechanism involves three steps, the C-O bond cleavage of the ring, H atom migration to the O atom, and the C-OH bond scission, in sequence, to generate OH from the ground electronic state of THF. Besides this high energy reaction channel, other photodissociation channels of THF have been identified by detecting the stable products, using Fourier transform infrared and gas chromatography.
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Affiliation(s)
- Sumana SenGupta
- Radiation Chemistry and Chemical Dynamics Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
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Schuurman MS, Muir SR, Allen WD, Schaefer HF. Toward subchemical accuracy in computational thermochemistry: Focal point analysis of the heat of formation of NCO and [H,N,C,O] isomers. J Chem Phys 2004; 120:11586-99. [PMID: 15268193 DOI: 10.1063/1.1707013] [Citation(s) in RCA: 290] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
In continuing pursuit of thermochemical accuracy to the level of 0.1 kcal mol(-1), the heats of formation of NCO, HNCO, HOCN, HCNO, and HONC have been rigorously determined using state-of-the-art ab initio electronic structure theory, including conventional coupled cluster methods [coupled cluster singles and doubles (CCSD), CCSD with perturbative triples (CCSD(T)), and full coupled cluster through triple excitations (CCSDT)] with large basis sets, conjoined in cases with explicitly correlated MP2-R12/A computations. Limits of valence and all-electron correlation energies were extrapolated via focal point analysis using correlation consistent basis sets of the form cc-pVXZ (X=2-6) and cc-pCVXZ (X=2-5), respectively. In order to reach subchemical accuracy targets, core correlation, spin-orbit coupling, special relativity, the diagonal Born-Oppenheimer correction, and anharmonicity in zero-point vibrational energies were accounted for. Various coupled cluster schemes for partially including connected quadruple excitations were also explored, although none of these approaches gave reliable improvements over CCSDT theory. Based on numerous, independent thermochemical paths, each designed to balance residual ab initio errors, our final proposals are DeltaH(f,0) ( composite function )(NCO)=+30.5, DeltaH(f,0) ( composite function )(HNCO)=-27.6, DeltaH(f,0) ( composite function )(HOCN)=-3.1, DeltaH(f,0) ( composite function )(HCNO)=+40.9, and DeltaH(f,0) ( composite function )(HONC)=+56.3 kcal mol(-1). The internal consistency and convergence behavior of the data suggests accuracies of +/-0.2 kcal mol(-1) in these predictions, except perhaps in the HCNO case. However, the possibility of somewhat larger systematic errors cannot be excluded, and the need for CCSDTQ [full coupled cluster through quadruple excitations] computations to eliminate remaining uncertainties is apparent.
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Affiliation(s)
- Michael S Schuurman
- Center for Computational Chemistry, University of Georgia, Athens, Georgia 30602-2525, USA
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Potter A, Dribinski V, Demyanenko A, Reisler H. Competitive channels in the jet-cooled photodissociation of the CH2Cl radical. Chem Phys Lett 2001. [DOI: 10.1016/s0009-2614(01)01175-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Dribinski V, Potter AB, Demyanenko AV, Reisler H. Photodissociation dynamics of the CH2Cl radical: Ion imaging studies of the Cl+CH2 channel. J Chem Phys 2001. [DOI: 10.1063/1.1400130] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Affiliation(s)
- H Sato
- Laser Photochemistry Research Group, Department of Chemistry for Materials, Faculty of Engineering, Mi'e University, 1515 Kamihamacho, Tsu 514-8507, Japan.
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Berghout HL, Hsieh S, Crim FF. Relative product yields in the one-photon and vibrationally mediated photolysis of isocyanic acid (HNCO). J Chem Phys 2001. [DOI: 10.1063/1.1371283] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Berghout HL, Crim FF, Zyrianov M, Reisler H. The electronic origin and vibrational levels of the first excited singlet state of isocyanic acid (HNCO). J Chem Phys 2000. [DOI: 10.1063/1.481242] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Valachovic LR, Tuchler MF, Dulligan M, Droz-Georget T, Zyrianov M, Kolessov A, Reisler H, Wittig C. Photoinitiated H2CO unimolecular decomposition: Accessing H+HCO products via S0 and T1 pathways. J Chem Phys 2000. [DOI: 10.1063/1.480849] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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