1
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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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2
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Zhang Z, Wu H, Chen Z, Fu Y, Fu B, Zhang DH, Yang X, Yuan K. Multiple Dissociation Pathways in HNCO Decomposition Governed by Potential Energy Surface Topography. JACS AU 2023; 3:2855-2861. [PMID: 37885590 PMCID: PMC10598830 DOI: 10.1021/jacsau.3c00414] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 08/24/2023] [Accepted: 08/31/2023] [Indexed: 10/28/2023]
Abstract
The exquisite features of molecular photochemistry are key to any complete understanding of the chemical processes governed by potential energy surfaces (PESs). It is well established that multiple dissociation pathways relate to nonadiabatic transitions between multiple coupled PESs. However, little detail is known about how the single PES determines reaction outcomes. Here we perform detailed experiments on HNCO photodissociation, acquiring the state-specific correlations of the NH (a1Δ) and CO (X1Σ+) products. The experiments reveal a trimodal CO rotational distribution. Dynamics simulations based on a full-dimensional machine-learning-based PES of HNCO unveil three dissociation pathways exclusively occurring on the S1 excited electronic state. One pathway, following the minimum energy path (MEP) via the transition state, contributes to mild rotational excitation in CO, while the other two pathways deviating substantially from the MEP account for relatively cold and hot CO rotational state populations. These peculiar dynamics are unambiguously governed by the S1 state PES topography, i.e., a narrow acceptance cone in the vicinity of the transition state region. The dynamical picture shown in this work will serve as a textbook example illustrating the importance of the PES topography in molecular photochemistry.
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Affiliation(s)
- Zhiguo Zhang
- State
Key Laboratory of Molecular Reaction Dynamics and Dalian Coherent
Light Source, Dalian Institute of Chemical
Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
- Key
Laboratory of Functional Materials and Devices for Informatics of
Anhui Educational Institutions and School of Physics and Electronic
Engineering, Fuyang Normal University, Fuyang, Anhui 236041, China
| | - Hao Wu
- State
Key Laboratory of Molecular Reaction Dynamics and Dalian Coherent
Light Source, Dalian Institute of Chemical
Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
- University
of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Zhichao Chen
- State
Key Laboratory of Molecular Reaction Dynamics and Dalian Coherent
Light Source, Dalian Institute of Chemical
Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Yanlin Fu
- State
Key Laboratory of Molecular Reaction Dynamics and Dalian Coherent
Light Source, Dalian Institute of Chemical
Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Bina Fu
- State
Key Laboratory of Molecular Reaction Dynamics and Dalian Coherent
Light Source, Dalian Institute of Chemical
Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
- University
of Chinese Academy of Sciences, Beijing 100049, P. R. China
- Hefei
National Laboratory, Hefei 230088, China
| | - Dong H. Zhang
- State
Key Laboratory of Molecular Reaction Dynamics and Dalian Coherent
Light Source, Dalian Institute of Chemical
Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
- University
of Chinese Academy of Sciences, Beijing 100049, P. R. China
- Hefei
National Laboratory, Hefei 230088, China
| | - Xueming Yang
- State
Key Laboratory of Molecular Reaction Dynamics and Dalian Coherent
Light Source, Dalian Institute of Chemical
Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
- University
of Chinese Academy of Sciences, Beijing 100049, P. R. China
- Hefei
National Laboratory, Hefei 230088, China
- Department
of Chemistry and Center for Advanced Light Source Research, College
of Science, Southern University of Science
and Technology, Shenzhen 518055, China
| | - Kaijun Yuan
- State
Key Laboratory of Molecular Reaction Dynamics and Dalian Coherent
Light Source, Dalian Institute of Chemical
Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
- University
of Chinese Academy of Sciences, Beijing 100049, P. R. China
- Hefei
National Laboratory, Hefei 230088, China
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3
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Qian W, Lu B, Tan G, Rauhut G, Grützmacher H, Zeng X. Vibrational spectrum and photochemistry of phosphaketene HPCO. Phys Chem Chem Phys 2021; 23:19237-19243. [PMID: 34524290 DOI: 10.1039/d1cp02860j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The vibrational spectra of the simplest phosphaketene HPCO and its isotopologue DPCO in solid Ar-matrices at 12.0 K have been analyzed with the aid of the computations at the CCSD(T)-F12a/cc-pVTZ-F12 level using configuration-selective vibrational configuration interaction (VCI). In addition to the four IR fundamentals, four overtone and ten combination bands have been unambiguously identified. Furthermore, the photochemistry of HPCO in the matrix has been investigated for the first time. Upon UV-light irradiation (365 or 266 nm), CO-elimination occurs by forming the parent phosphinidene HP that can be trapped by ˙NO to yield the elusive phosphinimine-N-oxyl radical HPNO˙. In contrast, an excimer laser (193 nm) irradiation of HPCO causes additional decomposition to H˙ and ˙PCO with concomitant formation of the long-sought phosphaethyne HOCP.
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Affiliation(s)
- Weiyu Qian
- Department of Chemistry, Fudan University, 200433 Shanghai, China.
| | - Bo Lu
- Department of Chemistry, Fudan University, 200433 Shanghai, China.
| | - Gengwen Tan
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 215123 Suzhou, China.
| | - Guntram Rauhut
- Institute for Theoretical Chemistry, University of Stuttgart, Pfaffenwaldring 55, Stuttgart 70569, Germany
| | | | - Xiaoqing Zeng
- Department of Chemistry, Fudan University, 200433 Shanghai, China.
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4
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Hydrogenations of Isocyanic Acid: A Computational Study on Four Possible Concerted Paths for Formamide Formation. Theor Chem Acc 2021. [DOI: 10.1007/s00214-021-02750-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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5
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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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6
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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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7
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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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8
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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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9
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Liu H, Liu Z, Zhang Y. A theoretical study of isocyanic acid with hydrogen radical (HNCO + OH) catalysed by Au x ( x = 0, 1, 3) cluster: dynamic characterisation. MOLECULAR SIMULATION 2017. [DOI: 10.1080/08927022.2017.1324956] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Hongxia Liu
- Chemistry and Environment Science College, Inner Mongolia Key Laboratory of Green Catalysis, Inner Mongolia Normal University, Hohhot, China
| | - Zizhong Liu
- Chemistry and Environment Science College, Inner Mongolia Key Laboratory of Green Catalysis, Inner Mongolia Normal University, Hohhot, China
| | - Yanhong Zhang
- Chemistry and Environment Science College, Inner Mongolia Key Laboratory of Green Catalysis, Inner Mongolia Normal University, Hohhot, China
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10
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Sutradhar S, Samanta BR, Samanta AK, Reisler H. Temperature dependence of the photodissociation of CO 2 from high vibrational levels: 205-230 nm imaging studies of CO(X 1Σ +) and O( 3P, 1D) products. J Chem Phys 2017; 147:013916. [PMID: 28688402 DOI: 10.1063/1.4979952] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The 205-230 nm photodissociation of vibrationally excited CO2 at temperatures up to 1800 K was studied using Resonance Enhanced Multiphoton Ionization (REMPI) and time-sliced Velocity Map Imaging (VMI). CO2 molecules seeded in He were heated in an SiC tube attached to a pulsed valve and supersonically expanded to create a molecular beam of rotationally cooled but vibrationally hot CO2. Photodissociation was observed from vibrationally excited CO2 with internal energies up to about 20 000 cm-1, and CO(X1Σ+), O(3P), and O(1D) products were detected by REMPI. The large enhancement in the absorption cross section with increasing CO2 vibrational excitation made this investigation feasible. The internal energies of heated CO2 molecules that absorbed 230 nm radiation were estimated from the kinetic energy release (KER) distributions of CO(X1Σ+) products in v″ = 0. At 230 nm, CO2 needs to have at least 4000 cm-1 of rovibrational energy to absorb the UV radiation and produce CO(X1Σ+) + O(3P). CO2 internal energies in excess of 16 000 cm-1 were confirmed by observing O(1D) products. It is likely that initial absorption from levels with high bending excitation accesses both the A1B2 and B1A2 states, explaining the nearly isotropic angular distributions of the products. CO(X1Σ+) product internal energies were estimated from REMPI spectroscopy, and the KER distributions of the CO(X1Σ+), O(3P), and O(1D) products were obtained by VMI. The CO product internal energy distributions change with increasing CO2 temperature, suggesting that more than one dynamical pathway is involved when the internal energy of CO2 (and the corresponding available energy) increases. The KER distributions of O(1D) and O(3P) show broad internal energy distributions in the CO(X1Σ+) cofragment, extending up to the maximum allowed by energy but peaking at low KER values. Although not all the observations can be explained at this time, with the aid of available theoretical studies of CO2 VUV photodissociation and O + CO recombination, it is proposed that following UV absorption, the two lowest lying triplet states, a3B2 and b3A2, and the ground electronic state are involved in the dynamical pathways that lead to product formation.
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Affiliation(s)
- S Sutradhar
- Department of Chemistry, University of Southern California, Los Angeles, California 90089-0482, USA
| | - B R Samanta
- Department of Chemistry, University of Southern California, Los Angeles, California 90089-0482, USA
| | - A K Samanta
- Department of Chemistry, University of Southern California, Los Angeles, California 90089-0482, USA
| | - H Reisler
- Department of Chemistry, University of Southern California, Los Angeles, California 90089-0482, USA
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11
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Bonnet L, Linguerri R, Hochlaf M, Yazidi O, Halvick P, Francisco JS. Full-Dimensional Theory of Pair-Correlated HNCO Photofragmentation. J Phys Chem Lett 2017; 8:2420-2424. [PMID: 28498666 DOI: 10.1021/acs.jpclett.7b00920] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Full-dimensional semiclassical dynamical calculations combining classical paths and Bohr quantization of product internal motions are reported for the prototype photofragmentation of isocyanic acid in the S1 state. These calculations allow one to closely reproduce for the first time key features of state-of-the-art imaging measurements at photolysis wavelengths of 201 and 210 nm while providing insight into the underlying dissociation mechanism. Quantum scattering calculations being beyond reach for most polyatomic fissions, pair-correlated data on these processes are much more often measured than predicted. Our theoretical approach can be used to fill this gap.
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Affiliation(s)
- L Bonnet
- Institut des Sciences Moléculaires, Université de Bordeaux, CNRS, UMR 5255 , 33405 Talence, France
| | - R Linguerri
- Laboratoire Modélisation et Simulation Multi Echelle, Université Paris-Est, UMR 8208 CNRS , 5 Bd Descartes, 77454 Marne La Vallée, France
| | - M Hochlaf
- Laboratoire Modélisation et Simulation Multi Echelle, Université Paris-Est, UMR 8208 CNRS , 5 Bd Descartes, 77454 Marne La Vallée, France
| | - O Yazidi
- Laboratoire de Spectroscopie Atomique, Moléculaire et Applications, LR01ES09, Faculté des Sciences de Tunis, Université de Tunis El Manar , 2092 Tunis, Tunisia
| | - P Halvick
- Institut des Sciences Moléculaires, Université de Bordeaux, CNRS, UMR 5255 , 33405 Talence, France
| | - J S Francisco
- Department of Chemistry, University of Nebraska-Lincoln , 433 Hamilton Hall, Lincoln, Nebraska 68588-0304, United States
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12
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Hou LJ, Wu BW, Han YX, Kong C, Chen DP, Gao LG. Density functional theoretical study on the reaction mechanism of SiHF radical with HNCO. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2014. [DOI: 10.1142/s0219633614500540] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The reaction mechanism of SiHF radical with HNCO has been investigated by the B3LYP method of density functional theory (DFT), while the geometries and harmonic vibration frequencies of reactants, intermediates, transition states and products have been calculated at the B3LYP/6-311++G** level. To obtain more precise energy result, stationary point energies were calculated at the CCSD(T)/6-311++G**//B3LYP/6-311++G** level. In temperature range of 100 K to 1900 K, the statistical thermodynamics and Eyring transition state theory with Winger correction are used to study the thermodynamic and kinetic characters of the channel with low energy barrier at 1.0 Atm. SiHF + HNCO → IM 8 → TS 8 → SiFNHCHO ( P 3) was the main channel with low potential energy in the singlet state, SiFNHCHO was the main product. The analyses for the combining interaction between SiHF radical and HNCO with the atom-in-molecules (AIM) theory have been performed. There are three reaction channels in the triplet.
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Affiliation(s)
- Li-Jie Hou
- School of Chemistry and Chemical Engineering, Longdong University, Qingyang 745000, P. R. China
| | - Bo-Wan Wu
- School of Chemistry and Chemical Engineering, Longdong University, Qingyang 745000, P. R. China
| | - Yan-Xia Han
- School of Chemistry and Chemical Engineering, Longdong University, Qingyang 745000, P. R. China
| | - Chao Kong
- School of Chemistry and Chemical Engineering, Longdong University, Qingyang 745000, P. R. China
| | - Dong-Ping Chen
- School of Chemistry and Chemical Engineering, Longdong University, Qingyang 745000, P. R. China
| | - Li-Guo Gao
- School of Chemistry and Chemical Engineering, Yulin University, Yulin 719000, P. R. China
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13
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Zhang Z, Chen Z, Huang C, Chen Y, Dai D, Parker DH, Yang X. Imaging the Pair-Correlated HNCO Photodissociation: The NH(a1Δ) + CO(X1Σ+) Channel. J Phys Chem A 2014; 118:2413-8. [DOI: 10.1021/jp500625m] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhiguo Zhang
- Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute
of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
| | - Zhichao Chen
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute
of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
| | - Cunshun Huang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute
of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
| | - Yang Chen
- Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
| | - Dongxu Dai
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute
of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
| | - David H. Parker
- Department of Molecular and Laser Physics, University of Nijmegen, 6525 ED Nijmegen, The Netherlands
| | - Xueming Yang
- Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute
of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
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14
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Hou LJ, Wu BW, Kong C, Han YX, Chen DP, Gao LG. Theoretical Study of the Reaction Mechanism for SiF 2Radical with HNCO. B KOREAN CHEM SOC 2013. [DOI: 10.5012/bkcs.2013.34.12.3738] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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15
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Yu S, Su S, Dai D, Yuan K, Yang X. Vacuum ultraviolet photodissociation dynamics of isocyanic acid: the hydrogen elimination channel. J Phys Chem A 2013; 117:13564-71. [PMID: 24041201 DOI: 10.1021/jp407556k] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Photodissociation dynamics of the H-atom channel from HNCO photolysis between 124 and 137 nm have been studied using the H-atom Rydberg tagging time-of-flight technique. Product translational energy distributions and angular distributions have been determined. Two dissociation channels, H + NCO (X(2)Π) and H + NCO(A(2)Σ(+)), have been observed. The former channel involves two different dissociation pathways; one is a slow predissociation pathway through internal conversion from the excited state to the S0 state, and the other is a fast predissociation pathway through internal conversion from the excited state to the S1 state. The latter channel dominates by a prompt dissociation via coupling to the S2 state. As the photon energy increases, dissociation on the ground state S0 becomes dominant. Vibrational structures are observed in both the NCO(X) and NCO(A) channels, which can be assigned to the bending mode excitation with some stretching vibrational excitation.
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Affiliation(s)
- Shengrui Yu
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , 457 Zhongshan Road, Dalian 116023, China
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16
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Yu S, Su S, Dorenkamp Y, Wodtke AM, Dai D, Yuan K, Yang X. Competition between Direct and Indirect Dissociation Pathways in Ultraviolet Photodissociation of HNCO. J Phys Chem A 2013; 117:11673-8. [DOI: 10.1021/jp312793k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shengrui Yu
- State key Laboratory of Molecular
Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian
116023, China
| | - Shu Su
- State key Laboratory of Molecular
Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian
116023, China
| | - Yvonne Dorenkamp
- Institut
fur Physikalische Chemie, Georg-August-Universitat and Max-Planck-Institut fur biophysikalische Chemie, Gottingen, Germany
| | - Alec M. Wodtke
- Institut
fur Physikalische Chemie, Georg-August-Universitat and Max-Planck-Institut fur biophysikalische Chemie, Gottingen, Germany
| | - Dongxu Dai
- State key Laboratory of Molecular
Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian
116023, China
| | - Kaijun Yuan
- State key Laboratory of Molecular
Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian
116023, China
| | - Xueming Yang
- State key Laboratory of Molecular
Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian
116023, China
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17
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Chichinin AI, Gericke KH, Kauczok S, Maul C. Imaging chemical reactions – 3D velocity mapping. INT REV PHYS CHEM 2009. [DOI: 10.1080/01442350903235045] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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18
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Wang H, Liu SL, Liu J, Wang FY, Jiang B, Yang XM. Photofragment Imaging of HNCO Decomposition at 210 nm: the Primary NH(a1)+CO(X1+) Channel. CHINESE J CHEM PHYS 2007. [DOI: 10.1088/1674-0068/20/04/388-394] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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19
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XU JIANHUA, LI LAICAI, ZHENG YAN, LIU JUNLING, WANG XIN. THEORETICAL STUDIES ON THE REACTION MECHANISM OF HNCS WITH CH2CH RADICAL. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2007. [DOI: 10.1142/s0219633607002794] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The reaction mechanisms of HNCS with CH 2 CH radical have been investigated by density functional theory (DFT). The geometries and harmonic frequencies of the reactants, intermediates, transition states and products have been calculated at the B3LYP/6-311++G(d,p) level. The results show that the reaction is very complicated. Nine possible reaction pathways were identified. The results show that the most feasible reaction channel is the hydrogen-transfer pathway CH 2 CH + HNCS → IMA1 → TSA1 → CH 2 CHH + NCS . The pathway VIC C-S addition channel ( CH 2 CH + HNCS → TSD5 → IMD4 → TSD9 → CH 2 CHS + CNH ) can also occur easily. Ethene and radical NCS is the main product of the studied reaction, and product P8 ( CH 2 CHS and CNH ) may also be observed. Compared with our previous study on the reaction HNCS + CH 2 CH , the present reaction is easier to proceed.
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Affiliation(s)
- JIAN-HUA XU
- Department of Chemistry, Sichuan Normal University, Chengdu 610066, People's Republic of China
- Department of Chemistry, Fuling Normal college, Chongqing 408003, People's Republic of China
| | - LAI-CAI LI
- Department of Chemistry, Sichuan Normal University, Chengdu 610066, People's Republic of China
| | - YAN ZHENG
- Department of Chemistry, Sichuan Normal University, Chengdu 610066, People's Republic of China
| | - JUN-LING LIU
- Department of Chemistry, Sichuan Normal University, Chengdu 610066, People's Republic of China
| | - XIN WANG
- Faculty of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China
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20
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Li LC, Shang J, Liu JL. Theoretical Study on the Reaction Mechanism of CH2F Radical with HNCO. CHINESE J CHEM PHYS 2006. [DOI: 10.1360/cjcp2006.19(5).451.6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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21
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Ashfold MNR, Nahler NH, Orr-Ewing AJ, Vieuxmaire OPJ, Toomes RL, Kitsopoulos TN, Garcia IA, Chestakov DA, Wu SM, Parker DH. Imaging the dynamics of gas phase reactions. Phys Chem Chem Phys 2006; 8:26-53. [PMID: 16482242 DOI: 10.1039/b509304j] [Citation(s) in RCA: 240] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ion imaging methods are making ever greater impact on studies of gas phase molecular reaction dynamics. This article traces the evolution of the technique, highlights some of the more important breakthroughs with regards to improving image resolution and in image processing and analysis methods, and then proceeds to illustrate some of the many applications to which the technique is now being applied--most notably in studies of molecular photodissociation and of bimolecular reaction dynamics.
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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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23
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Bonnet L, Larrégaray P, Rayez JC. Statisticodynamical approach of state distributions in the products of four-atom planar unimolecular reactions. I. Formal developments for conserved vibrations. J Chem Phys 2004; 120:3665-78. [PMID: 15268529 DOI: 10.1063/1.1641781] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Traditional statistical approaches, entirely based on transition state theory (TST), do not allow the description of rotational state distributions in the products of indirect reactions governed by short-range forces. Owing to the interpretative power of TST, this limitation has long been acting as a brake upon a deep understanding of determining attributes of indirect reaction dynamics. Recently, however, we developed a statisticodynamical approach (SDA) of final state distributions for triatomic unimolecular reactions [P. Larregaray, L. Bonnet, and J. C. Rayez, J. Chem. Phys. 114, 3349 (2001); Phys. Chem. Chem. Phys. 4, 1577 (2002); 4, 1781 (2002)]. The approach combines TST for the description of state distributions at the transition state (TS) and the linear transformation model for the description of their alteration on the way from the TS to the products. The whole description is mostly analytical, thus keeping the rationalizing spirit of TST. The goal of the present series is to extend SDA to the case of four-atom planar unimolecular reactions, assuming that internal vibrations of the nascent products are conserved from the TS on. This first part is concerned with formal developments while the remaining parts deal with their validation and application, in particular to the fragmentation of isocyanic acid.
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Affiliation(s)
- Laurent Bonnet
- Laboratoire de Physicochimie Moleculaire, UMR 5803, Universite Bordeaux 1 et CNRS, 33405 Talence, Cedex, France.
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YARKONY DAVIDR. Intersecting conical intersection seams in tetra-atomic molecules: the S1–S0internal conversion in HNCO. Mol Phys 2001. [DOI: 10.1080/00268970110056447] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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25
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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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Valeev EF, Allen WD, Schaefer HF, Császár AG, East ALL. Interlocking Triplet Electronic States of Isocyanic Acid: Sources of Nonadiabatic Photofragmentation Dynamics. J Phys Chem A 2001. [DOI: 10.1021/jp0039114] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Edward F. Valeev
- Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia 30602
| | - Wesley D. Allen
- Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia 30602
| | - Henry F. Schaefer
- Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia 30602
| | - Attila G. Császár
- Department of Theoretical Chemistry, Eötvös University, P.O. Box 32, H-1518 Budapest 112, Hungary
| | - Allan L. L. East
- Department of Chemistry, University of Regina, Regina, Saskatchewan, Canada SAS 0A2
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Yarkony DR. Characterizing the local topography of conical intersections using orthogonality constrained parameters: Application to the internal conversion S1→S0 in HNCO. J Chem Phys 2001. [DOI: 10.1063/1.1330745] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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28
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Zhao L, Li Z. Potential energy surface of the photolysis of isocyanic acid HNCO. ACTA ACUST UNITED AC 2001. [DOI: 10.1007/bf02879733] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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29
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Schinke R, Bittererová M. On the S1→S0 internal conversion in the photodissociation of HNCO: the role of the NC stretch as a promoting mode. Chem Phys Lett 2000. [DOI: 10.1016/s0009-2614(00)01286-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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30
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Hwang WG, Kim HL, Kim MS. State-selected photodissociation dynamics of CS2+ in the C̃ 2Σg+ state. J Chem Phys 2000. [DOI: 10.1063/1.1288143] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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31
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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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32
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Fang WH. Photodissociation of HN3 at 248 nm and Longer Wavelength: A CASSCF Study. J Phys Chem A 2000. [DOI: 10.1021/jp993386c] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Wei-Hai Fang
- Department of Chemistry, Beijing Normal University, Beijing 100875, People's Republic of China
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Pettersson M, Khriachtchev L, Lundell J, Jolkkonen S, Räsänen M. Photochemistry of HNCO in Solid Xenon: Photoinduced and Thermally Activated Formation of HXeNCO. J Phys Chem A 2000. [DOI: 10.1021/jp9936751] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mika Pettersson
- Laboratory of Physical Chemistry, P.O. Box 55, FIN-00014 University of Helsinki, Finland
| | - Leonid Khriachtchev
- Laboratory of Physical Chemistry, P.O. Box 55, FIN-00014 University of Helsinki, Finland
| | - Jan Lundell
- Laboratory of Physical Chemistry, P.O. Box 55, FIN-00014 University of Helsinki, Finland
| | - Santtu Jolkkonen
- Laboratory of Physical Chemistry, P.O. Box 55, FIN-00014 University of Helsinki, Finland
| | - Markku Räsänen
- Laboratory of Physical Chemistry, P.O. Box 55, FIN-00014 University of Helsinki, Finland
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34
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East ALL, Allen WD. Comment on “High-Level ab Initio and Density Functional Study of the CH + NO Reaction Product Branching”. J Phys Chem A 2000. [DOI: 10.1021/jp991701p] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
| | - W. D. Allen
- Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia 30602
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35
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Jursic BS. Response to Comment on “High-Level ab Initio and Density Functional Study of the CH + NO Reaction Product Branching”. J Phys Chem A 2000. [DOI: 10.1021/jp993113h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Branko S. Jursic
- Department of Chemistry, University of New Orleans, New Orleans, Louisiana 70148
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Pettersson M, Khriachtchev L, Jolkkonen S, Räsänen M. Photochemistry of HNCO in Solid Xe: Channels of UV Photolysis and Creation of H2NCO Radicals. J Phys Chem A 1999. [DOI: 10.1021/jp992224d] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mika Pettersson
- Laboratory of Physical Chemistry, P.O. Box 55, FIN-00014 University of Helsinki, Finland
| | - Leonid Khriachtchev
- Laboratory of Physical Chemistry, P.O. Box 55, FIN-00014 University of Helsinki, Finland
| | - Santtu Jolkkonen
- Laboratory of Physical Chemistry, P.O. Box 55, FIN-00014 University of Helsinki, Finland
| | - Markku Räsänen
- Laboratory of Physical Chemistry, P.O. Box 55, FIN-00014 University of Helsinki, Finland
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38
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Klossika JJ, Schinke R. The photodissociation of HNCO in the S1 band: A five-dimensional classical trajectory study. J Chem Phys 1999. [DOI: 10.1063/1.479883] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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39
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Kaledin AL, Cui Q, Heaven MC, Morokuma K. Ab initio theoretical studies on photodissociation of HNCO upon S1(1A″)←S0(1A′) excitation: The role of internal conversion and intersystem crossing. J Chem Phys 1999. [DOI: 10.1063/1.479758] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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40
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Coffey MJ, Berghout HL, Woods E, Crim FF. Vibrational spectroscopy and intramolecular energy transfer in isocyanic acid (HNCO). J Chem Phys 1999. [DOI: 10.1063/1.479026] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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41
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Zyrianov M, Sanov A, Droz-Georget T, Reisler H. Photoinitiated decomposition of HNCO near the H+NCO threshold: Centrifugal barriers and channel competition. J Chem Phys 1999. [DOI: 10.1063/1.478998] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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