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Zhong H, Meng Q, Mei B, Thawko A, Yan C, Liu N, Mao X, Wang Z, Wysocki G, Truhlar DG, Ju Y. Kinetics and Mechanism of the Singlet Oxygen Atom Reaction with Dimethyl Ether. J Phys Chem Lett 2024; 15:6158-6165. [PMID: 38836585 DOI: 10.1021/acs.jpclett.4c00907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2024]
Abstract
We combine in situ laser spectroscopy, quantum chemistry, and kinetic calculations to study the reaction of a singlet oxygen atom with dimethyl ether. Infrared laser absorption spectroscopy and Faraday rotation spectroscopy are used for the detection and quantification of the reaction products OH, H2O, HO2, and CH2O on submillisecond time scales. Fitting temporal profiles of products with simulations using an in-house reaction mechanism allows product branching to be quantified at 30, 60, and 150 Torr. The experimentally determined product branching agrees well with master equation calculations based on electronic structure data and transition state theory. The calculations demonstrate that the dimethyl peroxide (CH3OOCH3) generated via O-insertion into the C-O bond undergoes subsequent dissociation to CH3O + CH3O through energetically favored reactions without an intrinsic barrier. This O-insertion mechanism can be important for understanding the fate of biofuels leaking into the atmosphere and for plasma-based biofuel processing technologies.
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Affiliation(s)
- Hongtao Zhong
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08540, United States
| | - Qinghui Meng
- Department of Chemistry and Chemical Theory Center, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Bowen Mei
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08540, United States
| | - Andy Thawko
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08540, United States
| | - Chao Yan
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08540, United States
| | - Ning Liu
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08540, United States
| | - Xingqian Mao
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08540, United States
| | - Ziyu Wang
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08540, United States
| | - Gerard Wysocki
- Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08540, United States
| | - Donald G Truhlar
- Department of Chemistry, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Yiguang Ju
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08540, United States
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08540, United States
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Aardema M, Fast M, Meas B, North SW. Rotational Distributions and Imaging of Singlet O 2 Following Spin-Forbidden Photodissociation of O 3. J Phys Chem A 2023; 127:7101-7114. [PMID: 37540577 PMCID: PMC10863062 DOI: 10.1021/acs.jpca.3c02736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 07/14/2023] [Indexed: 08/06/2023]
Abstract
We report REMPI spectra and velocity-mapped ion images of the O2(a1Δg) and (b1Σg+) fragments arising from the spin-forbidden photodissociation of O3 near 320 and 330 nm. The O2(a1Δg, v = 0) REMPI spectrum following a 320 nm dissociation shows enhanced peak intensity for the odd rotational states relative to the even states, which is the opposite of the trend observed by Gunthardt et al. ( J. Chem. Phys. 2019, 151, 224302) for spin-allowed dissociation at 266 nm but is consistent with the couplings between the B state and 3A' and 3A″ states calculated by Grebenshchikov and Rosenwaks ( J. Phys. Chem. A 2010, 114, 9809-9819). There are no significant differences between the ion image angular distributions of fragments in odd and even rotational states, which indicates a cold distribution of O3 and supports the explanation that the alternation in peak intensities results from a difference in the couplings. Quantitative analysis of the image angular distributions was limited due to the single laser polarization geometry accessible in one-color experiments. Radial distributions of the 320 nm images indicate a broad rotational distribution, evidenced in bimodal speed distributions with peaks corresponding to both high (j = 35-43) and low (j = 17-20) rotational states. The REMPI spectrum of O2(a1Δg) near 330 nm was collected, and while quantitative population analysis is difficult because of the perturbed resonant state, the spectrum clearly supports a broad rotational distribution as well, consistent with the images collected at 320 nm. A 2D-REMPI spectrum was collected following dissociation of O3 near 330 nm, which showed evidence of contributions from O2 fragments in both the a1Δg and b1Σg+ states. The rotational distribution for the O2(b1Σg+, v = 0) product peaks at j = 32 and is narrower than that of the O2(a1Δg) fragment, consistent with distributions reported by O'Keeffe et al. at longer dissociation wavelengths ( J. Chem. Phys. 2002, 117, 8705-8709). At smaller radii in the 2D-REMPI spectrum, there is additional signal assigned to v = 1-4 of O2(b1Σg+), with rotational distributions similar to v = 0. The vibrational distribution of the O2(b1Σg+) fragment peaks at v = 0, with populations monotonically decreasing with increasing vibrational state. Ion image angular distributions of the O2(b1Σg+) fragment and the corresponding anisotropy parameters are also reported.
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Affiliation(s)
- Megan
N. Aardema
- Department of Chemistry, Texas A&M University, College Station, Texas 77842, United States
| | - Megan Fast
- Department of Chemistry, Texas A&M University, College Station, Texas 77842, United States
| | - Benjamen Meas
- Department of Chemistry, Texas A&M University, College Station, Texas 77842, United States
| | - Simon W. North
- Department of Chemistry, Texas A&M University, College Station, Texas 77842, United States
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Khan AA, Esrafili MD, Ahmad A, Hull E, Ahmad R, Jan SU, Ahmad I. A computational study on the characteristics of open-shell H-bonding interaction between carbamic acid (NH2COOH) and HO2, HOS or HSO radicals. J Mol Model 2019; 25:189. [DOI: 10.1007/s00894-019-4070-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Accepted: 05/22/2019] [Indexed: 10/26/2022]
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5
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Kamata K, Akai N, Nakata M. Red-light induced photoreaction of ozone-dimethylamine complex; matrix-isolation infrared spectra of dimethylamine-N-oxide and N,N-dimethylhydroxylamine. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2018.07.041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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6
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Gligorovski S, Strekowski R, Barbati S, Vione D. Environmental Implications of Hydroxyl Radicals (•OH). Chem Rev 2015; 115:13051-92. [DOI: 10.1021/cr500310b] [Citation(s) in RCA: 737] [Impact Index Per Article: 81.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Sasho Gligorovski
- Aix-Marseille
Université, CNRS, LCE UMR 7376, 13331 Marseilles, France
| | - Rafal Strekowski
- Aix-Marseille
Université, CNRS, LCE UMR 7376, 13331 Marseilles, France
| | - Stephane Barbati
- Aix-Marseille
Université, CNRS, LCE UMR 7376, 13331 Marseilles, France
| | - Davide Vione
- Dipartimento
di Chimica, Università di Torino, Via P. Giuria 5, 10125 Torino, Italy
- Centro
Interdipartimentale NatRisk, Università di Torino, Via L. Da
Vinci 44, 10095 Grugliasco, Italy
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Picconi D, Grebenshchikov SY. Intermediate photofragment distributions as probes of non-adiabatic dynamics at conical intersections: application to the Hartley band of ozone. Phys Chem Chem Phys 2015; 17:28931-42. [DOI: 10.1039/c5cp04564a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Quantum dynamics at a reactive two-state conical intersection lying outside the Franck–Condon zone is studied for a prototypical reaction of ultraviolet photodissociation of ozone in the Hartley band.
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Affiliation(s)
- David Picconi
- Department of Chemistry
- Technische Universität München
- 85747 Garching
- Germany
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8
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Defazio P, Gamallo P, Petrongolo C. Nonadiabatic dynamics of O(1D) + N2(XΣg+1)→O(3P) + N2(XΣg+1) on three coupled potential surfaces: Symmetry, Coriolis, spin-orbit, and Renner-Teller effects. J Chem Phys 2012; 136:054308. [DOI: 10.1063/1.3682467] [Citation(s) in RCA: 15] [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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Oliver TAA, King GA, Ashfold MNR. Position matters: competing O–H and N–H photodissociation pathways in hydroxy- and methoxy-substituted indoles. Phys Chem Chem Phys 2011; 13:14646-62. [DOI: 10.1039/c1cp21260e] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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10
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Han H, Suo B, Xie D, Lei Y, Wang Y, Wen Z. Electronic structure calculations of low-lying electronic states of O3. Phys Chem Chem Phys 2011; 13:2723-31. [DOI: 10.1039/c0cp01300e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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Ab initio quantum mechanical study of the O((1)D) formation in the photolysis of ozone between 300 and 330 nm. J Phys Chem A 2010; 114:9809-19. [PMID: 20509638 DOI: 10.1021/jp1028849] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Spin-allowed production of O((1)D) in the near-UV photolysis of ozone is studied using ab initio potential energy surfaces and quantum mechanics. The O((1)D) quantum yield, reconstructed from the absolute cross sections for eight initial vibrational states in the ground electronic state, is shown to agree with the measurements in a broad range of photolysis wavelengths and temperatures. Relative contributions of one- and two-quantum stretching and bending initial excitations are quantified, with the contribution of the antisymmetric stretch being dominant for lambda < 330 nm. Large scale structures in the low-resolution quantum yield are shown to reflect excitations in the high-frequency short bond stretch in the upper electronic state. Spin-forbidden contribution to the O((1)D) quantum yield at wavelengths lambda > 320 nm is estimated using ab initio energies of the triplet states and their spin-orbit couplings.
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12
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Horrocks SJ, Ritchie GAD, Sharples TR. Probing the O2 (a 1Delta g) photofragment following ozone dissociation within the long wavelength tail of the Hartley band. J Chem Phys 2007; 126:044308. [PMID: 17286471 DOI: 10.1063/1.2429656] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The technique of resonance enhanced multiphoton ionization (REMPI) has been used in conjunction with time-of-flight mass spectrometry (TOFMS), to investigate the dynamics of ozone photolysis in the long wavelength region of the Hartley band (301-311 nm). Specifically, both the translational anisotropy and the rotational angular momentum orientation of the O(2) (a (1)Delta(g); nu=0, J=16-20) fragments have been measured as a function of photolysis wavelength. Within this region, the thermodynamic thresholds for the formation of these products in combination with O ((1)D(2)) are approached and passed, and consequently these studies have allowed an investigation into the effects on the dynamics of slowing fragment recoil velocities and the increasing importance of vibrationally mediated photolysis. The determined beta parameters for all the J states probed follow a similar trend, decreasing from a value typical for the initial (1)B(2)<--(1)A(1) excitation responsible for the Hartley band [for example, beta=1.40+/-0.12 for the O(2) (a (1)Delta(g); J=18) fragment], to a much lower value beyond the thermodynamic threshold for the fragment's production (for example, beta=0.63+/-0.19 for the J=18 fragment following photolysis at 311 nm). This trend, similar to that observed when probing the atomic fragment in a previous set of experiments, [Horrocks et al., J. Chem. Phys. 125, 133313 (2006); Denzer et al., Phys. Chem. Chem. Phys. 16, 1954 (2006)] is consistent with the photodissociation of vibrationally excited ozone molecules beyond the threshold wavelengths and we estimate approximately 1/3 of this to be from excitation in the nu(3) asymmetric stretching mode. These observations are substantiated by the values of the beta(0) (2)(2,1) orientation moment measured, which for photolysis at 301 nm are negative, indicating that a bond opening mechanism provides the key torque for the departing O(2) fragment. The orientation moment becomes positive again for photolysis beyond threshold, however, as the increasing impulsive dissociation again begins to dominate the nature of the rotation of the departing molecular fragment. In addition, a (2+2) REMPI scheme has been utilized to probe the O(2) (a (1)Delta(g)) "low" J fragments, where the majority of the population resides following photolysis within this region. The REMPI-TOFMS technique has been used to confirm the rotational character of a spectral feature through examination of the signal line shapes obtained using different experimental geometries. The dynamical information subsequently obtained, probing the "low" J O(2) (a (1)Delta(g)) fragments on these rotational transitions, has unified previous translational anisotropy results obtained by detecting the O ((1)D(2)) atomic fragment with data for the O(2) (a (1)Delta(g); J=16-20) fragments.
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Affiliation(s)
- S J Horrocks
- Physical and Theoretical Chemistry Laboratory, The University of Oxford, South Parks Road, Oxford, OX1 3QZ, UK
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14
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Horrocks SJ, Pearson PJ, Ritchie GAD. Vector properties of the O(D21) fragment produced from the photolysis of ozone in the wavelength range of 298to320nm. J Chem Phys 2006; 125:133313. [PMID: 17029466 DOI: 10.1063/1.2201746] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
The speed averaged translational anisotropy and electronic angular momentum polarization of the O(1D2) atomic fragment formed from the photodissociation of ozone in the atmospherically important long wavelength region of the Hartley band (298 to 320 nm) have been measured using resonance enhanced multiphoton ionization time of flight mass spectrometry. The translational anisotropy parameter, beta, is found to decline from 1.1 for photolysis at 300 nm to a minimum value of 0 at 310 nm which is the threshold for production of O(1D2) in conjunction with the O2(a 1Deltag v = 0) molecular cofragment. For photolysis wavelengths greater than 310 nm, O(1D2) is formed from the dissociation of internally excited ozone molecules. The corresponding beta parameters are markedly lower than for atomic fragments produced with the same speed from the photolysis of ground state ozone molecules. This result is consistent with two different pathways contributing to the photolysis of internally excited ozone at the longest wavelengths studied corresponding to initial internal excitation either in the symmetric or asymmetric stretching vibration. In addition, the polarization of the atomic angular momentum has been determined with the incoherent polarization parameters a0(2)(||) and a0(2)(_|) increasing from values of -0.53 and -0.62 at 300 nm to -0.37 and -0.19 at 317 nm, consistent with the increasing contribution from the photolysis of internally excited ozone as the dissociation wavelength lengthens. Evaluation of these alignment parameters allows the populations of the magnetic substrates, mj, to be determined. For example, for a photolysis wavelength of 303 nm the populations of mj = 0, +/- 1, +/- 2 are in the ratio of 0.36: 0.56: 0.08 and this ratio is essentially independent of the photolysis wavelength. The coherent contribution to the atomic polarization is quantified by the Re{a1(2)(||, _|)} and Im{a1(1)(||, _|)} parameters and these are found to vary from -0.21 and 0.21 at 300 nm to -0.04 and 0.24 at 313 nm, respectively.
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Affiliation(s)
- S J Horrocks
- Physical and Theoretical Chemistry Laboratory, The University of Oxford, South Parks Road, Oxford, OX1 3QZ, United Kingdom
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15
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Childs WR, Motala MJ, Lee KJ, Nuzzo RG. Masterless soft lithography: patterning UV/ozone-induced adhesion on poly(dimethylsiloxane) surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2005; 21:10096-105. [PMID: 16229532 DOI: 10.1021/la050011b] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
A novel microreactor-based photomask capable of effecting high resolution, large area patterning of UV/ozone (UVO) treatments of poly(dimethylsiloxane) (PDMS) surfaces is described. This tool forms the basis of two new soft lithographic patterning techniques that significantly extend the design rules of decal transfer lithography (DTL). The first technique, photodefined cohesive mechanical failure, fuses the design rules of photolithography with the contact-based adhesive transfer of PDMS in DTL. In a second powerful variation, the UVO masks described in this work enable a masterless soft lithographic patterning process. This latter method, UVO-patterned adhesive transfer, allows the direct transfer of PDMS-based polymer microstructures from a slab of polymer to silicon and other material surfaces. Both methods exploit the improved process qualities that result from the use of a deuterium discharge lamp to affect the UVO treatment to pattern complex, large area PDMS patterns with limiting feature sizes extending well below 1 microm (> or = 0.3 microm). The use of these structures as resists is demonstrated for the patterning of metal thin films. A time-of-flight secondary ion mass spectroscopy study of the process provides new insights into the mechanisms that contribute to the chemistry responsible for the interfacial adhesion of DTL transfers.
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Affiliation(s)
- William R Childs
- School of Chemical Sciences, Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
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16
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Qu ZW, Zhu H, Grebenshchikov SY, Schinke R. The photodissociation of ozone in the Hartley band: A theoretical analysis. J Chem Phys 2005; 123:074305. [PMID: 16229568 DOI: 10.1063/1.2001650] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Three-dimensional diabatic potential energy surfaces for the lowest four electronic states of ozone with 1A' symmetry-termed X, A, B, and R-are constructed from electronic structure calculations. The diabatization is performed by reassigning corresponding energy points. Although approximate, these diabatic potential energy surfaces allow one to study the uv photodissociation of ozone on a level of theory not possible before. In the present work photoexcitation in the Hartley band and subsequent dissociation into the singlet channel, O3X+hnu-->O(1D)+O2(a 1Deltag), are investigated by means of quantum mechanical and classical trajectory calculations using the diabatic potential energy surface of the B state. The calculated low-resolution absorption spectrum as well as the vibrational and rotational state distributions of O2(a 1Deltag) are in good agreement with available experimental results.
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Affiliation(s)
- Z-W Qu
- Max-Planck-Institut für Dynamik und Selbstorganisation, D-37073 Göttingen, Germany
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17
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Baloïtcha E, Balint-Kurti GG. Theory of the photodissociation of ozone in the Hartley continuum: Potential energy surfaces, conical intersections, and photodissociation dynamics. J Chem Phys 2005; 123:014306. [PMID: 16035834 DOI: 10.1063/1.1903947] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Ab initio potential energy and transition dipole moment surfaces are presented for the five lowest singlet even symmetry electronic states of ozone. The surfaces are calculated using the complete active space self consistent field method followed by contracted multireference configuration interaction (MRCI) calculations. A slightly reduced augmented correlation consistent valence triple-zeta orbital basis set is used. The ground and excited state energies of the molecule have been computed at 9282 separate nuclear geometries. Cuts through the potential energy surfaces, which pass through the geometry of the minimum of the ground electronic state, show several closely avoided crossings. Close examination, and higher level calculations, very strongly suggests that some of these seemingly avoided crossings are in fact associated with non-symmetry related conical intersections. Diabatic potential energy and transition dipole moment surfaces are created from the computed ab initio adiabatic MRCI energies and transition dipole moments. The transition dipole moment connecting the ground electronic state to the diabatic B state surface is by far the strongest. Vibrational-rotational wavefunctions and energies are computed using the ground electronic state. The energy level separations compare well with experimentally determined values. The ground vibrational state wavefunction is then used, together with the diabatic B<--X transition dipole moment surface, to form an initial wavepacket. The analysis of the time-dependent quantum dynamics of this wavepacket provides the total and partial photodissociation cross sections for the system. Both the total absorption cross section and the predicted product quantum state distributions compare well with experimental observations. A discussion is also given as to how the observed alternation in product diatom rotational state populations might be explained.
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Affiliation(s)
- Ezinvi Baloïtcha
- Center for Computational Chemistry, School of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom.
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18
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Takahashi K, Takeuchi Y, Matsumi Y. Rate constants of the O(1D) reactions with N2, O2, N2O, and H2O at 295K. Chem Phys Lett 2005. [DOI: 10.1016/j.cplett.2005.05.062] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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19
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Baloïtcha E, Balint-Kurti GG. Theory of the photodissociation of ozone in the Hartley continuum; effect of vibrational excitation and O(1D) atom velocity distribution. Phys Chem Chem Phys 2005; 7:3829-33. [PMID: 16358032 DOI: 10.1039/b511640f] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effect of vibrational excitation on the photodissociation cross section of ozone in the Hartley continuum is examined. The calculations make use of newly computed potential energy and transition dipole moment surfaces. The initial vibrational states of the ozone are computed using grid based techniques and the first few ab initio computed vibrational energy level spacings agree to within 10 cm(-1) with experimental values. The computed total absorption cross sections arising from different initial vibrational states of ozone are discussed in the light of the nature of the transition dipole moment surface. The computed cross section for excitation from the ground vibrational-rotational state is in good agreement with the experimentally measured cross section. Excitation of the asymmetric stretching vibration of ozone has a marked effect on both the form and magnitude of the photodissociation cross section. The velocity distributions of highly reactive O(1D) atoms arising from the photodissociation process in different wavelength ranges is also presented. The results show that the O(1D) atoms travel with a most probable translational velocity of 2.030 km s(-1) corresponding to a translational energy of 0.342 eV or 33.0 kJ mol(-1).
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Affiliation(s)
- Ezinvi Baloïtcha
- Centre for Computational Chemistry, School of Chemistry, University of Bristol, Bristol, UK BS8 1TS.
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20
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Nishida S, Taketani F, Takahashi K, Matsumi Y. Quantum Yield for O(1D) Production from Ozone Photolysis in the Wavelength Range of 193−225 nm. J Phys Chem A 2004. [DOI: 10.1021/jp049979r] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Satoshi Nishida
- Solar-Terrestrial Environment Laboratory and Graduate School of Science, Nagoya University, Honohara 3-13, Toyokawa, Aichi, 442-8507, Japan
| | - Fumikazu Taketani
- Solar-Terrestrial Environment Laboratory and Graduate School of Science, Nagoya University, Honohara 3-13, Toyokawa, Aichi, 442-8507, Japan
| | - Kenshi Takahashi
- Solar-Terrestrial Environment Laboratory and Graduate School of Science, Nagoya University, Honohara 3-13, Toyokawa, Aichi, 442-8507, Japan
| | - Yutaka Matsumi
- Solar-Terrestrial Environment Laboratory and Graduate School of Science, Nagoya University, Honohara 3-13, Toyokawa, Aichi, 442-8507, Japan
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21
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Zhu H, Qu ZW, Tashiro M, Schinke R. On spin-forbidden processes in the ultra-violet photodissociation of ozone. Chem Phys Lett 2004. [DOI: 10.1016/j.cplett.2003.11.095] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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22
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Affiliation(s)
- Dwayne E Heard
- Department of Chemistry, University of Leeds, Leeds LS2 9JT, U.K.
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23
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Slanger TG, Copeland RA. Energetic Oxygen in the Upper Atmosphere and the Laboratory. Chem Rev 2003; 103:4731-66. [PMID: 14664631 DOI: 10.1021/cr0205311] [Citation(s) in RCA: 203] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tom G Slanger
- Molecular Physics Laboratory, SRI International, Menlo Park, CA 94025, USA
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Matsumi Y, Kawasaki M. Photolysis of Atmospheric Ozone in the Ultraviolet Region. Chem Rev 2003; 103:4767-82. [PMID: 14664632 DOI: 10.1021/cr0205255] [Citation(s) in RCA: 97] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yutaka Matsumi
- Solar Terrestrial Environment Laboratory and Graduate School of Science, Nagoya University, Toyokawa 442-8505, Japan.
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25
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Lake DA, Tolocka MP, Johnston MV, Wexler AS. Mass spectrometry of individual particles between 50 and 750 nm in diameter at the Baltimore Supersite. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2003; 37:3268-3274. [PMID: 12966969 DOI: 10.1021/es026270u] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The performance of the real-time single-particle mass spectrometer RSMS III is evaluated for ambient fine and ultrafine particle number concentration measurements. The RSMS III couples aerodynamic size selection with laser ablation time-of-flight mass spectrometry for single-particle analysis. It was deployed at the Baltimore particulate matter Supersite for semi-continuous operation over an 8-month period. The sampling protocol adopted for this study permitted the analysis of on average 2000 particles per day. The number of particles analyzed is a tradeoff between generating a statistically significant data set and maintaining instrument operation over a long period of time. The optimum particle size range of analysis was found to be ca. 50-770 nm in diameter, although particles as small as 45 nm and as large as 1250 nm were also analyzed. While nitrate, sulfate, and carbon (elemental and organic) were found to dominate the ambient aerosol, over 10% of the detected particles contained transition and/or heavy metals. The (size-dependent) detection efficiency, defined as the fraction of particles entering the inlet that are analyzed, was determined by comparison with scanning mobility particle sizing data. Using the experimentally determined detection efficiencies, particle number concentrations of specific chemical components were estimated. While the sampling protocol allowed the particle concentrations of major chemical components to be followed as a function of both time and particle size, minor components required averaging over time and/or size to achieve adequate precision.
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Affiliation(s)
- Derek A Lake
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, USA
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Chakraborty S, Bhattacharya S. Oxygen isotopic anomaly in surface induced ozone dissociation. Chem Phys Lett 2003. [DOI: 10.1016/s0009-2614(03)00018-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Mauldin RL. Measurements of OH, H2SO4, and MSA during Tropospheric Ozone Production About the Spring Equinox (TOPSE). ACTA ACUST UNITED AC 2003. [DOI: 10.1029/2002jd002295] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Kawasaki M, Bersohn R. Photodissociation of Small Molecules in the Gas Phase. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2002. [DOI: 10.1246/bcsj.75.1885] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Zanis P. A case study on the possible link between surface ozone photochemistry and total ozone column during the PAUR II experiment at Crete: Comparison of observations with box model calculations. ACTA ACUST UNITED AC 2002. [DOI: 10.1029/2000jd000137] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Chapter 11 Ozone and other secondary photochemical pollutants: chemical processes governing their formation in the planetary boundary layer. ACTA ACUST UNITED AC 2002. [DOI: 10.1016/s1474-8177(02)80014-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Matsumi Y. Quantum yields for production of O(1D) in the ultraviolet photolysis of ozone: Recommendation based on evaluation of laboratory data. ACTA ACUST UNITED AC 2002. [DOI: 10.1029/2001jd000510] [Citation(s) in RCA: 84] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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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.
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Affiliation(s)
- D Conroy
- Department of Chemistry, University of Southern California, Los Angeles, California 90089-0482, USA
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Smith JB, Hintsa EJ, Allen NT, Stimpfle RM, Anderson JG. Mechanisms for midlatitude ozone loss: Heterogeneous chemistry in the lowermost stratosphere? ACTA ACUST UNITED AC 2001. [DOI: 10.1029/2000jd900464] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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34
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de Grandpré J, Beagley SR, Fomichev VI, Griffioen E, McConnell JC, Medvedev AS, Shepherd TG. Ozone climatology using interactive chemistry: Results from the Canadian Middle Atmosphere Model. ACTA ACUST UNITED AC 2000. [DOI: 10.1029/2000jd900427] [Citation(s) in RCA: 148] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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35
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Newman SM, Orr-Ewing AJ, Newnham DA, Ballard J. Temperature and Pressure Dependence of Line Widths and Integrated Absorption Intensities for the O2 aΔg − X3Σg- (0,0) Transition. J Phys Chem A 2000. [DOI: 10.1021/jp001640r] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Smith GD, Molina LT, Molina MJ. Temperature Dependence of O(1D) Quantum Yields from the Photolysis of Ozone between 295 and 338 nm. J Phys Chem A 2000. [DOI: 10.1021/jp001006d] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Geoffrey D. Smith
- Departments of Earth, Atmospheric and Planetary Sciences and of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Luisa T. Molina
- Departments of Earth, Atmospheric and Planetary Sciences and of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Mario J. Molina
- Departments of Earth, Atmospheric and Planetary Sciences and of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
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Affiliation(s)
- Nori Taniguchi
- Solar-Terrestrial Environment Laboratory and Graduate School of Science, Nagoya University, Honohara 3−13, Toyokawa, Aichi, 442-8507, Japan
| | - Kenshi Takahashi
- Solar-Terrestrial Environment Laboratory and Graduate School of Science, Nagoya University, Honohara 3−13, Toyokawa, Aichi, 442-8507, Japan
| | - Yutaka Matsumi
- Solar-Terrestrial Environment Laboratory and Graduate School of Science, Nagoya University, Honohara 3−13, Toyokawa, Aichi, 442-8507, Japan
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38
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OYAMA STED. Chemical and Catalytic Properties of Ozone. CATALYSIS REVIEWS-SCIENCE AND ENGINEERING 2000. [DOI: 10.1081/cr-100100263] [Citation(s) in RCA: 246] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Sugita A, Mashino M, Kawasaki M, Matsumi Y, Bersohn R, Trott-Kriegeskorte G, Gericke KH. Effect of molecular bending on the photodissociation of OCS. J Chem Phys 2000. [DOI: 10.1063/1.481324] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.6] [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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Ninomiya Y, Hashimoto S, Kawasaki M, Wallington TJ. Cavity ring-down study of BrO radicals: Kinetics of the Br + O3 reaction and rate of relaxation of vibrationally excited BrO by collisions with N2 and O2. INT J CHEM KINET 2000. [DOI: 10.1002/(sici)1097-4601(2000)32:3<125::aid-kin1>3.0.co;2-4] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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41
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Taniguchi N, Takahashi K, Matsumi Y, Dylewski SM, Geiser JD, Houston PL. Determination of the heat of formation of O3 using vacuum ultraviolet laser-induced fluorescence spectroscopy and two-dimensional product imaging techniques. J Chem Phys 1999. [DOI: 10.1063/1.479939] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Poirier GE, Herne TM, Miller CC, Tarlov MJ. Molecular-Scale Characterization of the Reaction of Ozone with Decanethiol Monolayers on Au(111). J Am Chem Soc 1999. [DOI: 10.1021/ja991739f] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gregory E. Poirier
- Contribution from the National Institute of Standards and Technology, Gaithersburg, Maryland 20899
| | - Tonya M. Herne
- Contribution from the National Institute of Standards and Technology, Gaithersburg, Maryland 20899
| | - C. Cameron Miller
- Contribution from the National Institute of Standards and Technology, Gaithersburg, Maryland 20899
| | - Michael J. Tarlov
- Contribution from the National Institute of Standards and Technology, Gaithersburg, Maryland 20899
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O’Keeffe P, Ridley T, Lawley KP, Maier RRJ, Donovan RJ. Kinetic energy analysis of O(3P0) and O2(b 1Σg+) fragments produced by photolysis of ozone in the Huggins bands. J Chem Phys 1999. [DOI: 10.1063/1.479023] [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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