1
|
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.
Collapse
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.
| |
Collapse
|
2
|
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.
Collapse
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
| |
Collapse
|
3
|
Zhong J, Li L, Kumar M, Zeng XC, Zhang J, Francisco JS. Solvation and Hydrolysis Reaction of Isocyanic Acid at the Air-Water Interface: A Computational Study. J Am Chem Soc 2022; 144:5315-5322. [PMID: 35290046 DOI: 10.1021/jacs.1c10703] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Isocyanic acid (HNCO) is known to be inert to strong oxidants and photolysis in the atmosphere but often appears in different forms of smoke; therefore, it is linked to various smoke-related illnesses due to tobacco usage or wildfire events. To date, the major loss pathway of HNCO is believed to be through its uptake on aerosol droplets. However, the molecular mechanisms underlying such an uptake process are still incompletely understood. Herein, we use the Born-Oppenheimer molecular dynamics (BOMD) simulations to study solvation and hydrolysis reactions of HNCO on water droplets at ambient temperature. The BOMD simulations indicate that the scavenging of HNCO by water droplets is largely attributed to the preferential adsorption of HNCO at the air-water interface, rather than inside bulk water. Specifically, the H atom of HNCO interacts with the O atom of interfacial water, leading to the formation of a hydrogen bond (H-bond) of (HNCO)H···O(H2O), which prevents HNCO from evaporating. Moreover, the interfacial water can act as H-bond acceptors/donors to promote the proton transfer during the HNCO hydrolysis reaction. Compared to the gas phase, the activation barrier is lowered from 45 to 14 kcal·mol-1 on the water surface, which facilitates the formation of the key intermediate of NH2COOH. This intermediate eventually decomposes into NH3 and CO2, consistent with the previous study [ Atmos. Chem. Phys. 2016, 16, 703-714]. The new molecular insight into HNCO solvation and reaction on the water surface improves our understanding of the uptake of HNCO on aerosols.
Collapse
Affiliation(s)
- Jie Zhong
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, Shandong, China
| | - Liwen Li
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, Shandong, China
| | - Manoj Kumar
- Department of Chemistry, University of Nebraska─Lincoln, Lincoln, Nebraska 68588, United States
| | - Xiao Cheng Zeng
- Department of Chemistry, University of Nebraska─Lincoln, Lincoln, Nebraska 68588, United States
| | - Jun Zhang
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, Shandong, China
| | - Joseph S Francisco
- Department of Earth and Environmental Science, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6316, United States
| |
Collapse
|
4
|
Parandaman A, Tangtartharakul CB, Kumar M, Francisco JS, Sinha A. A Computational Study Investigating the Energetics and Kinetics of the HNCO + (CH3)2NH Reaction Catalyzed by a Single Water Molecule. J Phys Chem A 2017; 121:8465-8473. [DOI: 10.1021/acs.jpca.7b08657] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Arathala Parandaman
- Department
of Chemistry and Biochemistry, University of California−San Diego, La Jolla, California 92093, United States
| | - Chanin B. Tangtartharakul
- Department
of Chemistry and Biochemistry, University of California−San Diego, La Jolla, California 92093, United States
| | - Manoj Kumar
- Department
of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, United States
| | - Joseph S. Francisco
- Department
of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, United States
| | - Amitabha Sinha
- Department
of Chemistry and Biochemistry, University of California−San Diego, La Jolla, California 92093, United States
| |
Collapse
|
5
|
Talukder S, Sen S, Shandilya BK, Sharma R, Chaudhury P, Adhikari S. Enhancing the branching ratios in the dissociation channels for O(16)O(16)O(18) molecule by designing optimum laser pulses: A study using stochastic optimization. J Chem Phys 2015; 143:144109. [PMID: 26472365 DOI: 10.1063/1.4932333] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We propose a strategy of using a stochastic optimization technique, namely, simulated annealing to design optimum laser pulses (both IR and UV) to achieve greater fluxes along the two dissociating channels (O(18) + O(16)O(16) and O(16) + O(16)O(18)) in O(16)O(16)O(18) molecule. We show that the integrated fluxes obtained along the targeted dissociating channel is larger with the optimized pulse than with the unoptimized one. The flux ratios are also more impressive with the optimized pulse than with the unoptimized one. We also look at the evolution contours of the wavefunctions along the two channels with time after the actions of both the IR and UV pulses and compare the profiles for unoptimized (initial) and optimized fields for better understanding the results that we achieve. We also report the pulse parameters obtained as well as the final shapes they take.
Collapse
Affiliation(s)
- Srijeeta Talukder
- Department of Chemistry, University of Calcutta, 92 A P C Road, Kolkata 700 009, India
| | - Shrabani Sen
- Department of Chemistry, Rammohan College, 102/1, Raja Rammohan Sarani, Kolkata 700 009, India
| | - Bhavesh K Shandilya
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India
| | - Rahul Sharma
- Department of Chemistry, St. Xavier's College, 30 Mother Teresa Sarani, Kolkata 700 016, India
| | - Pinaki Chaudhury
- Department of Chemistry, University of Calcutta, 92 A P C Road, Kolkata 700 009, India
| | - Satrajit Adhikari
- Department of Physical Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India
| |
Collapse
|
6
|
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
| |
Collapse
|
7
|
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.
Collapse
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
| | | | | | | | | |
Collapse
|
8
|
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
| |
Collapse
|
9
|
Young PJ, Emmons LK, Roberts JM, Lamarque JF, Wiedinmyer C, Veres P, VandenBoer TC. Isocyanic acid in a global chemistry transport model: Tropospheric distribution, budget, and identification of regions with potential health impacts. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/2011jd017393] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
10
|
Portnov A, Epshtein M, Rosenwaks S, Bar I. Vibrational dynamics of pyrrole via frequency-domain spectroscopy. J Chem Phys 2012; 136:024313. [PMID: 22260585 DOI: 10.1063/1.3673614] [Citation(s) in RCA: 5] [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 N-H stretch overtones of pyrrole, a key constituent of biologic building blocks, were studied by room temperature photoacoustic and jet-cooled action spectroscopies to unravel their intramolecular dynamics. Contrary to "isolated" states excited with two and three N-H stretch quanta, the one with four quanta shows strong accidental resonances with two other states involving three quanta of N-H stretch and one quantum of C-H stretch. The inhomogeneously reduced features in the action spectra provide the means for getting insight into the intramolecular interactions and the factors controlling energy flow within pyrrole. The time dependence of the survival probability of the 4ν(1) N-H stretch, deduced from the vibrational Hamiltonian, shows an initial decay in ~0.3 ps with ensuing quantum beats from the N-H-C-H resonance and their decay with a time constant of about 5 ps as a result of weaker coupling to bath states.
Collapse
|
11
|
Isocyanic acid in the atmosphere and its possible link to smoke-related health effects. Proc Natl Acad Sci U S A 2011; 108:8966-71. [PMID: 21576489 DOI: 10.1073/pnas.1103352108] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We measured isocyanic acid (HNCO) in laboratory biomass fires at levels up to 600 parts per billion by volume (ppbv), demonstrating that it has a significant source from pyrolysis/combustion of biomass. We also measured HNCO at mixing ratios up to 200 pptv (parts-per-trillion by volume) in ambient air in urban Los Angeles, CA, and in Boulder, CO, during the recent 2010 Fourmile Canyon fire. Further, our measurements of aqueous solubility show that HNCO is highly soluble, as it dissociates at physiological pH. Exposure levels > 1 ppbv provide a direct source of isocyanic acid and cyanate ion (NCO(-)) to humans at levels that have recognized health effects: atherosclerosis, cataracts, and rheumatoid arthritis, through the mechanism of protein carbamylation. In addition to the wildland fire and urban sources, we observed HNCO in tobacco smoke, HNCO has been reported from the low-temperature combustion of coal, and as a by-product of urea-selective catalytic reduction (SCR) systems that are being phased-in to control on-road diesel NO(x) emissions in the United States and the European Union. Given the current levels of exposure in populations that burn biomass or use tobacco, the expected growth in biomass burning emissions with warmer, drier regional climates, and planned increase in diesel SCR controls, it is imperative that we understand the extent and effects of this HNCO exposure.
Collapse
|
12
|
Ziemkiewicz M, Nesbitt DJ. Nonadiabatic reactive scattering in atom+triatom systems: Nascent rovibronic distributions in F+H[sub 2]O→HF+OH. J Chem Phys 2009; 131:054309. [DOI: 10.1063/1.3194284] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
13
|
Marom R, Zecharia U, Rosenwaks† S, Bar I. Propensity towards H photofragments in the photodissociation of CD3NH2 pre-excited to the first N–H stretch overtone. Mol Phys 2008. [DOI: 10.1080/00268970701757016] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
14
|
Farrow DA, Qian W, Smith ER, Ferro AA, Jonas DM. Polarized pump-probe measurements of electronic motion via a conical intersection. J Chem Phys 2008; 128:144510. [DOI: 10.1063/1.2837471] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Darcie A. Farrow
- Department of Chemistry and Biochemistry, University of Colorado, 215 UCB, Boulder, Colorado 80309-0215, USA
| | - Wei Qian
- Department of Chemistry and Biochemistry, University of Colorado, 215 UCB, Boulder, Colorado 80309-0215, USA
| | - Eric R. Smith
- Department of Chemistry and Biochemistry, University of Colorado, 215 UCB, Boulder, Colorado 80309-0215, USA
| | - Allison A. Ferro
- Department of Chemistry and Biochemistry, University of Colorado, 215 UCB, Boulder, Colorado 80309-0215, USA
| | - David M. Jonas
- Department of Chemistry and Biochemistry, University of Colorado, 215 UCB, Boulder, Colorado 80309-0215, USA
| |
Collapse
|
15
|
Lim J, Lee Y, Kim S. Control of Intramolecular Orbital Alignment in the Photodissociation of Thiophenol: Conformational Manipulation by Chemical Substitution. Angew Chem Int Ed Engl 2008; 47:1853-6. [DOI: 10.1002/anie.200705358] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
16
|
Lim J, Lee Y, Kim S. Control of Intramolecular Orbital Alignment in the Photodissociation of Thiophenol: Conformational Manipulation by Chemical Substitution. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200705358] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
17
|
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.
Collapse
Affiliation(s)
- Michael S Schuurman
- Center for Computational Chemistry, University of Georgia, Athens, Georgia 30602-2525, USA
| | | | | | | |
Collapse
|
18
|
Dantus M, Lozovoy VV. Experimental Coherent Laser Control of Physicochemical Processes. Chem Rev 2004; 104:1813-59. [PMID: 15080713 DOI: 10.1021/cr020668r] [Citation(s) in RCA: 144] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Marcos Dantus
- Department of Chemistry and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA.
| | | |
Collapse
|
19
|
Delitsky ML, Lane AL. Saturn's inner satellites: Ice chemistry and magnetosphere effects. ACTA ACUST UNITED AC 2002. [DOI: 10.1029/2002je001855] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
20
|
Dorfman G, Melchior A, Rosenwaks S, Bar I. Vibrationally Mediated Photodissociation of Jet-Cooled CH3CF2Cl: A Probe of Energy Flow and Bond Breaking Dynamics. J Phys Chem A 2002. [DOI: 10.1021/jp014431v] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gabriela Dorfman
- Department of Physics, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Aviva Melchior
- Department of Physics, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Salman Rosenwaks
- Department of Physics, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Ilana Bar
- The Institutes for Applied Research, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| |
Collapse
|
21
|
Dagdigian PJ. Quantum theory of vector correlations in vibrationally mediated photodissociation. J Chem Phys 2002. [DOI: 10.1063/1.1468881] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
22
|
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]
|
23
|
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.
| |
Collapse
|
24
|
Conroy D, Aristov V, Feng L, Sanov A, Reisler H. Competitive pathways via nonadiabatic transitions in photodissociation. Acc Chem Res 2001; 34:625-32. [PMID: 11513569 DOI: 10.1021/ar970047y] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Photodissociation processes of molecules and radicals involving multiple pathways and nonadiabatic crossings are studied using the photofragment imaging technique and the core-sampling version of time-of-flight spectroscopy. Capabilities and challenges are illustrated by two systems. The isocyanic acid system demonstrates how interactions among potential energy surfaces can change during dissociation. The hydroxymethyl photodecomposition system highlights Rydberg-valence interactions common in free radicals. The cross-fertilization between theory and experiment is emphasized.
Collapse
Affiliation(s)
- D Conroy
- Department of Chemistry, University of Southern California, Los Angeles, California 90089-0482, USA
| | | | | | | | | |
Collapse
|
25
|
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
|
26
|
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
| |
Collapse
|
27
|
Yarkony DR. Symmetry Friend or Foe: Confluences of Conical Intersection Seams in Tetra-Atomic Molecules. J Phys Chem A 2001. [DOI: 10.1021/jp003766u] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- David R. Yarkony
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218
| |
Collapse
|
28
|
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
|
29
|
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]
|
30
|
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
|
31
|
Ferretti A, Lami A, Villani G. A model study of the wavepacket dynamics around a Jahn–Teller conical intersection in a symmetric charge-transfer system. Chem Phys 2000. [DOI: 10.1016/s0301-0104(00)00197-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
32
|
Controlling the Bimolecular Reaction and Photodissociation of HNCO through Selective Excitation of Perturbed Vibrational States. J Phys Chem A 2000. [DOI: 10.1021/jp001369d] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
33
|
Melchior A, Chen X, Bar I, Rosenwaks S. Photolysis and Spectroscopy of Vibrationally Excited C−H Overtones of CHFCl2. J Phys Chem A 2000. [DOI: 10.1021/jp000791r] [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]
Affiliation(s)
- Aviva Melchior
- Department of Physics, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Xiangling Chen
- Department of Physics, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Ilana Bar
- Department of Physics, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Salman Rosenwaks
- Department of Physics, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| |
Collapse
|
34
|
Melchior A, Chen X, Bar I, Rosenwaks S. Vibrationally excited states of CH3CFCl2: Intramolecular vibrational redistribution and photodissociation dynamics. J Chem Phys 2000. [DOI: 10.1063/1.481752] [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
|
35
|
Pederson LA, Schatz GC, Hollebeek T, Ho TS, Rabitz H, Harding LB. Potential Energy Surface of the à State of NH2 and the Role of Excited States in the N(2D) + H2 Reaction. J Phys Chem A 1999. [DOI: 10.1021/jp9924575] [Citation(s) in RCA: 73] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
36
|
|
37
|
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
|
38
|
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
|
39
|
Muenter JS, Rebstein J, Callegari A, Rizzo TR. Photodissociation detection of microwave transitions in highly excited vibrational states. J Chem Phys 1999. [DOI: 10.1063/1.479633] [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
|
40
|
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
|
41
|
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
|
42
|
Zyrianov M, Droz-Georget T, Reisler H. Fragment recoil anisotropies in the photoinitiated decomposition of HNCO. J Chem Phys 1999. [DOI: 10.1063/1.477874] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|