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Aardema MN, McBane GC, North SW. Ozone Photodissociation in the Singlet Channel at 226 nm. J Phys Chem A 2022; 126:6898-6907. [PMID: 36129835 DOI: 10.1021/acs.jpca.2c04832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report the rotational state distribution and vector correlations of the O2(a 1Δg, v = 0) fragments arising from the 226 nm photodissociation of jet-cooled O3. Consistent with previously reported trends, the rotational distribution is shifted to higher rotational states with decreasing wavelength. We observe highly suppressed odd rotational state populations due to a strong Λ-doublet propensity. The measured rotational distribution is in agreement with classical trajectory calculations for the v = 0 products, although the distribution is slightly narrower than predicted. The spatial anisotropy follows the previously observed trend of decreasing β with increasing photon energy with β = 0.72 ± 0.14 for v = 0, j = 38. As expected for a triatomic molecule, the v-j correlation is consistent with v perpendicular to j, but the measured correlation is nonlimiting due, in part, to rotational and translational depolarization. The j-dependent line width of the O2(a 1Δg) REMPI spectrum is also discussed in connection with the lifetime of the resonant O2(d 1Πg) state due to predissociation via the II 1Πg valence state.
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Affiliation(s)
- Megan N Aardema
- Department of Chemistry, Texas A&M University, College Station, Texas 77842, United States
| | - George C McBane
- Department of Chemistry, Grand Valley State University, Allendale, Michigan 49401, United States
| | - Simon W North
- Department of Chemistry, Texas A&M University, College Station, Texas 77842, United States
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Srinivas D, Kawade M, Upadhyaya HP. Resonance enhanced multiphoton ionisation (REMPI) detection of Cl(2Pj) atom in the photodissociation of halogenated pyrimidines at 235 nm: role of triplet states. Mol Phys 2018. [DOI: 10.1080/00268976.2018.1557753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Doddipatla Srinivas
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, HBNI, Trombay, Mumbai 400 085, India
| | - Monali Kawade
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, HBNI, Trombay, Mumbai 400 085, India
| | - Hari P. Upadhyaya
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, HBNI, Trombay, Mumbai 400 085, India
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Suits AG. Invited Review Article: Photofragment imaging. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2018; 89:111101. [PMID: 30501356 DOI: 10.1063/1.5045325] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 10/25/2018] [Indexed: 06/09/2023]
Abstract
Photodissociation studies in molecular beams that employ position-sensitive particle detection to map product recoil velocities emerged thirty years ago and continue to evolve with new laser and detector technologies. These powerful methods allow application of tunable laser detection of single product quantum states, simultaneous measurement of velocity and angular momentum polarization, measurement of joint product state distributions for the detected and undetected products, coincident detection of multiple product channels, and application to radicals and ions as well as closed-shell molecules. These studies have permitted deep investigation of photochemical dynamics for a broad range of systems, revealed new reaction mechanisms, and addressed problems of practical importance in atmospheric, combustion, and interstellar chemistry. This review presents an historical overview, a detailed technical account of the range of methods employed, and selected experimental highlights illustrating the capabilities of the method.
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Affiliation(s)
- Arthur G Suits
- Department of Chemistry, University of Missouri, Columbia, Missouri 65211, USA
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Srinivas D, Sajeev Y, Upadhyaya HP. Resonance enhanced multiphoton ionization − time of flight (REMPI-TOF) detection of Br ( 2 P j ) atoms in the photodissociation of 4-bromo-2,3,5,6-tetrafluoropyridine at 234 nm: Effect of low-lying πσ* states. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.05.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Srinivas D, Upadhyaya HP. Chlorine atom formation dynamics in the dissociation of halogenated pyridines after photoexcitation at 235 nm: A resonance enhanced multiphoton ionization-time of flight (REMPI-TOF) study. Chem Phys 2016. [DOI: 10.1016/j.chemphys.2016.04.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Srinivas D, Upadhyaya HP. Dynamics of Cl(2Pj) formation in the photodissociation of halogenated thiadiazole at 235 nm: A resonance enhanced multiphoton ionization-time of flight (REMPI-TOF) study. J Photochem Photobiol A Chem 2016. [DOI: 10.1016/j.jphotochem.2016.02.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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7
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Dynamics of CBr bond dissociation in methyl 2-bromopropionate at 235 nm: A resonance-enhanced multiphoton ionization study. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2015.11.050] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Saha A, Kawade M, SenGupta S, Upadhyaya HP, Kumar A, Naik PD. Photodissociation Dynamics of Benzoyl Chloride at 235 nm: Resonance-Enhanced Multiphoton Ionization Detection of Cl and HCl. J Phys Chem A 2014; 118:1185-95. [DOI: 10.1021/jp410511c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ankur Saha
- Radiation and Photochemistry
Division, Bhabha Atomic Research Centre, Trombay Mumbai − 400 085, Maharashtra, India
| | - Monali Kawade
- Radiation and Photochemistry
Division, Bhabha Atomic Research Centre, Trombay Mumbai − 400 085, Maharashtra, India
| | - Sumana SenGupta
- Radiation and Photochemistry
Division, Bhabha Atomic Research Centre, Trombay Mumbai − 400 085, Maharashtra, India
| | - Hari P. Upadhyaya
- Radiation and Photochemistry
Division, Bhabha Atomic Research Centre, Trombay Mumbai − 400 085, Maharashtra, India
| | - Awadhesh Kumar
- Radiation and Photochemistry
Division, Bhabha Atomic Research Centre, Trombay Mumbai − 400 085, Maharashtra, India
| | - Prakash D. Naik
- Radiation and Photochemistry
Division, Bhabha Atomic Research Centre, Trombay Mumbai − 400 085, Maharashtra, India
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Resonance enhanced multiphoton ionization time-of-flight (REMPI-TOF) study of tetrachloroethylene photodissociation at 235nm: Role of bound π-σC-Cl∗ state. Chem Phys 2014. [DOI: 10.1016/j.chemphys.2013.11.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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10
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Houston PL, Cosofret BR, Dixit A, Dylewski SM, Geiser JD, Mueller JA, Wilson RJ, Pisano PJ, Westley MS, Lorenz KT, Chandler DW. Product Imaging Studies of Photodissociation and Bimolecular Reaction Dynamics. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200100048] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Saha A, Kawade MN, Upadhyaya HP, Kumar A, Naik PD. Photoexcitation of 2-bromo-2-chloro-1,1,1-trifluoroethane (halothane) to repulsive surface nσ∗(C–Br) at 234 nm: Dynamics of C–Br and C–Cl bond rupture. Chem Phys 2013. [DOI: 10.1016/j.chemphys.2013.02.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Kawade M, Saha A, Upadhyaya HP, Kumar A, Naik PD, Bajaj P. Photodissociation Dynamics of Halogenated Thiophenes at 235 nm: A Resonance Enhanced Multiphoton Ionization-Time-of-Flight (REMPI-TOF) Study. J Phys Chem A 2012; 116:10656-67. [DOI: 10.1021/jp3068602] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Monali Kawade
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
| | - Ankur Saha
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
| | - Hari P. Upadhyaya
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
| | - Awadhesh Kumar
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
| | - Prakash D. Naik
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
| | - P.N. Bajaj
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
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Saha A, Kawade M, Upadhyaya HP, Kumar A, Naik PD, Bajaj P. Resonance enhanced multiphoton ionization time-of-flight (REMPI-TOF) study of phosphorous oxychloride (POCl3) dissociation at 235nm: Dynamics of Cl(2Pj) formation. Chem Phys 2012. [DOI: 10.1016/j.chemphys.2012.09.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Saha A, Upadhyaya HP, Kumar A, Naik PD, Bajaj PN. Dynamics of CCl bond fission in photodissociation of 2-furoyl chloride at 235nm. Chem Phys 2012. [DOI: 10.1016/j.chemphys.2012.04.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Saha A, Kawade M, Upadhyaya HP, Kumar A, Naik PD. Laser-induced UV photodissociation of 2-bromo-2-nitropropane: Dynamics of OH and Br formation. J Chem Phys 2011; 134:044316. [DOI: 10.1063/1.3532085] [Citation(s) in RCA: 7] [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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16
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Upadhyaya HP, Saha A, Kumar A, Bandyopadhyay T, Naik PD, Bajaj P. Photodissociation Dynamics of Phosphorus Trichloride (PCl3) at 235 nm Using Resonance Enhanced Multiphoton Ionization (REMPI) with Time-of-Flight (TOF) Mass Spectrometry. J Phys Chem A 2010; 114:5271-8. [DOI: 10.1021/jp100538u] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Hari P. Upadhyaya
- Radiation & Photochemistry Division and Theoretical Chemistry Section, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
| | - Ankur Saha
- Radiation & Photochemistry Division and Theoretical Chemistry Section, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
| | - Awadhesh Kumar
- Radiation & Photochemistry Division and Theoretical Chemistry Section, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
| | - T. Bandyopadhyay
- Radiation & Photochemistry Division and Theoretical Chemistry Section, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
| | - Prakash D. Naik
- Radiation & Photochemistry Division and Theoretical Chemistry Section, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
| | - P.N. Bajaj
- Radiation & Photochemistry Division and Theoretical Chemistry Section, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
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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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Suits AG, Vasyutinskii OS. Imaging Atomic Orbital Polarization in Photodissociation. Chem Rev 2008; 108:3706-46. [DOI: 10.1021/cr040085c] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Arthur G. Suits
- Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, and Ioffe Physico-Technical Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia
| | - Oleg S. Vasyutinskii
- Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, and Ioffe Physico-Technical Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia
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19
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Brouard M, Goman A, Horrocks SJ, Johnsen AJ, Quadrini F, Yuen WH. The photodissociation dynamics of ozone at 226 and 248nm: O(PJ3) atomic angular momentum polarization. J Chem Phys 2007; 127:144304. [DOI: 10.1063/1.2790890] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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20
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Horrocks SJ, Ritchie GAD, Sharples TR. Speed dependent rotational angular momentum polarization of the O2 (aΔg1) fragment following ozone photolysis in the wavelength range 248–265nm. J Chem Phys 2007; 127:114308. [PMID: 17887838 DOI: 10.1063/1.2775453] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The translational anisotropy and rotational angular momentum polarization of a selection of rotational states of the O2 (a 1Deltag; v=0) photofragment formed from ozone photolysis at 248, 260, and 265 nm have been determined using the technique of resonance enhanced multiphoton ionization in combination with time of flight mass spectrometry. At 248 nm, the dissociation is well described as impulsive in nature with all rotational states exhibiting similarly large, near-limiting values for the bipolar moments describing their angular momentum alignment and orientation. At 265 nm, however, the angular momentum polarization parameters determined for consecutive odd and even rotational states exhibit clear differences. Studies at the intermediate wavelength of 260 nm strongly suggest that such a difference in the angular momentum polarization is speed dependent and this proposal is consistent with the angular momentum polarization parameters extracted and reported previously for longer photolysis wavelengths [G. Hancock et al., Phys. Chem. Chem. Phys. 5, 5386 (2003); S. J. Horrocks et al., J. Chem. Phys. 126, 044308 (2007)]. The alternation of angular momentum polarization for successive odd and even J states may be a consequence of the different mechanisms leading to the formation of the two O2 (a 1Deltag) Lambda doublets. Specifically, the involvement of out of plane parent rotational motion is proposed as the origin for the observed depolarization for the Delta- relative to the Delta+ state.
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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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Chen KM. Electronic angular momentum polarizations of photofragments: a case study of ICN photodissociation from a perpendicular transition. J Chem Phys 2007; 126:214307. [PMID: 17567196 DOI: 10.1063/1.2734972] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A quantum treatment on ICN photodissociation from an initial perpendicular transition (Omega'=+/-1<--Omega"=0) to the asymptote CN(|Sigma+,J'M'N'1/2>)+I(2P3/2) is presented. Density matrices of both photofragments are derived and explicit expressions of the state multipoles in terms of the angular momentum coupling coefficients and the rotation-bending factors have been obtained. To perceive the physical origin of electronic angular momentum polarizations of the iodine photofragments, a correlation scheme which considers the magnetic dipolar and the electrostatic dipole-quadrupole interactions between I and CN cofragments is proposed. For ICN precursors in the vibrational ground state or in the equally populated l-type split levels, the alignment parameters of the iodine photofragments in the molecular frame can be calculated according to this long-range interaction model. For the perpendicular transition |1Pi1><--|1Sigma0+>, its alignment parameters of I(2P3/2) from the incoherent and coherent transitions to the |Omega'=1> and |Omega'=-1> components are rho(0)2(1Pi1)=0.756 and rho2(2)(1Pi1)=-0.656, respectively. For the perpendicular transition to |3Pi1>, rho(0)2(3Pi1)=-0.878 and rho2(2)(3Pi1)=0.328 are from the incoherent transition, whereas rho(0)2(3Pi1)=0.122 and rho2(2)(3Pi1)=0.328 are from the coherent transition. To analyze the photoion images of iodine photofragments, angular distributions of I+ from the 2+1 resonance-enhanced multiphoton ionization detection scheme are derived.
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Affiliation(s)
- Kuo-Mei Chen
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung 804, Taiwan, Republic of China.
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Abstract
Oxygen-iodine lasers that utilize electrical or microwave discharges to produce singlet oxygen are currently being developed. The discharge generators differ from conventional chemical singlet oxygen generators in that they produce significant amounts of atomic oxygen. Post-discharge chemistry includes channels that lead to the formation of ozone. Consequently, removal of I(2P1/2) by O atoms and O3 may impact the efficiency of discharge driven iodine lasers. In the present study, we have measured the rate constants for quenching of I(2P1/2) by O(3P) atoms and O3 using pulsed laser photolysis techniques. The rate constant for quenching by O3, (1.8 +/- 0.4) x 10(-12) cm3 s-1, was found to be a factor of 5 smaller than the literature value. The rate constant for quenching by O(3P) was (1.2 +/- 0.2) x 10(-11) cm3 s-1.
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Affiliation(s)
- Valeriy N Azyazov
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA
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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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Lambert HM, Davis EW, Tokel O, Dixit AA, Houston PL. Photodissociation channels for N2O near 130 nm studied by product imaging. J Chem Phys 2005; 122:174304. [PMID: 15910029 DOI: 10.1063/1.1888579] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The photodissociation of N(2)O at wavelengths near 130 nm has been investigated by velocity-mapped product imaging. In all, five dissociation channels have been detected, leading to the following products: O((1)S)+N(2)(X (1)Sigma), N((2)D)+NO(X (2)Pi), N((2)P)+NO(X (2)Pi), O((3)P) + N(2)(A (3)Sigma(+) (u)), and O((3)P) + N(2)(B (3)Pi(g)). The most significant channel is to the products O((1)S) + N(2)(X(1)Sigma), with strong vibrational excitation in the N(2). The O((3)P) + N(2)(A,B):N((2)D,(2)P) + NO branching ratio is measured to be 1.4 +/- 0.5, while the N(2)(A) + O((3)P(J)):N(2)(B) + O((3)P(J)) branching ratio is determined to be 0.84+/-0.09. The spin-orbit distributions for the O((3)P(J)), N((2)P(J)), and N((2)D(J)) products were also determined. The angular distributions of the products are in qualitative agreement with excitation to the N(2)O(D (1)Sigma(+)) state, with participation as well by the (3)Pi(v) state.
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Affiliation(s)
- H M Lambert
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853-1301, USA
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Kyoung Lee S, Townsend D, Vasyutinskii OS, Suits AG. O(1D2) orbital orientation in the ultraviolet photodissociation of ozone. Phys Chem Chem Phys 2005; 7:1650-6. [DOI: 10.1039/b502371h] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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26
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Lambert HM, Dixit AA, Davis EW, Houston PL. Quantum yields for product formation in the 120–133 nm photodissociation of O2. J Chem Phys 2004; 121:10437-46. [PMID: 15549924 DOI: 10.1063/1.1809114] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The photodissociation of O(2) in the region from 120-133 nm has been investigated using product imaging. The spectrum in this region is dominated by transitions from the ground state to the first three vibrational levels of the E (3)Sigma(u) (-) state. The O((1)D)+O((3)P) channel is the only product channel observed by product imaging for dissociation at either 124.4 nm or 120.4 nm. The O((1)D(2)) product is aligned in the molecular frame in such a way that its J vector is perpendicular to the relative velocity vector between the O((1)D) and the O((3)P). The variation in the anisotropy of dissociation is approximately predicted by considering transitions on individual lines and then taking into account the coherent excitation of overlapping resonances. At 132.7 nm, both the O((1)D)+O((3)P) and the O((3)P)+O((3)P) channels are observed with branching ratios of 0.40+/-0.08 and 0.60+/-0.09, respectively. At 130.2 nm, the quantum yield for production of O((1)D) is 0.76+/-0.28.
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Affiliation(s)
- H M Lambert
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853-1301, USA
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Chakraborty S. Experimental investigation of oxygen isotope exchange between CO2and O(1D) and its relevance to the stratosphere. ACTA ACUST UNITED AC 2003. [DOI: 10.1029/2002jd002915] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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28
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Cosofret BR, Lambert HM, Houston PL. Two-photon photodissociation of NO through Rydberg levels in the 265–278 nm region: Spectra and photofragment angular distributions. J Chem Phys 2002. [DOI: 10.1063/1.1513458] [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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29
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Zou P, Kim H, North SW. The ultraviolet photodissociation of jet-cooled ClO and BrO radicals. J Chem Phys 2002. [DOI: 10.1063/1.1448282] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
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Affiliation(s)
- H Sato
- Laser Photochemistry Research Group, Department of Chemistry for Materials, Faculty of Engineering, Mi'e University, 1515 Kamihamacho, Tsu 514-8507, Japan.
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Lin SY, Han KL, He GZ. Exact three-dimensional quantum mechanical calculation of ozone photodissociation in the Hartley band. J Chem Phys 2001. [DOI: 10.1063/1.1374580] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Arnold PA, Cosofret BR, Dylewski SM, Houston PL, Carpenter BK. Evidence of a Double Surface Crossing between Open- and Closed-Shell Surfaces in the Photodissociation of Cyclopropyl Iodide. J Phys Chem A 2001. [DOI: 10.1021/jp0037504] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Pamela A. Arnold
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853-1301, and School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853-2501
| | - Bogdan R. Cosofret
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853-1301, and School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853-2501
| | - Scott M. Dylewski
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853-1301, and School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853-2501
| | - Paul L. Houston
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853-1301, and School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853-2501
| | - Barry K. Carpenter
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853-1301, and School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853-2501
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Cosofret BR, Dylewski SM, Houston PL. Changes in the Vibrational Population of SO(3Σ-) from the Photodissociation of SO2 between 202 and 207 nm. J Phys Chem A 2000. [DOI: 10.1021/jp001276w] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bogdan R. Cosofret
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853
| | - Scott M. Dylewski
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853
| | - Paul L. Houston
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853
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Geiser JD, Dylewski SM, Mueller JA, Wilson RJ, Toumi R, Houston PL. The vibrational distribution of O2(X 3Σg−) produced in the photodissociation of ozone between 226 and 240 and at 266 nm. J Chem Phys 2000. [DOI: 10.1063/1.480679] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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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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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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Kreher CJ, Carter RT, Huber JR. Photodissociation of OClO and Ar/OClO and H2O/OClO clusters studied by the resonance enhanced multiphoton ionization-time of flight method. J Chem Phys 1999. [DOI: 10.1063/1.478196] [Citation(s) in RCA: 15] [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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Bergmann K, Carter RT, Hall GE, Huber JR. Resonance enhanced multiphoton ionization time-of-flight study of CF2I2 photodissociation. J Chem Phys 1998. [DOI: 10.1063/1.476670] [Citation(s) in RCA: 47] [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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