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Kallos IS, Bar I, Baraban JH. Significantly Improved Detection of Molecular Oxygen by Two-Color Resonance-Enhanced Multiphoton Ionization. J Phys Chem Lett 2024; 15:2639-2642. [PMID: 38421311 DOI: 10.1021/acs.jpclett.4c00141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
We report a new spectroscopic detection scheme for molecular oxygen that achieves roughly two orders of magnitude higher sensitivity for fully rotationally resolved spectra than the current state of the art. Two-color (2 + 1') resonance-enhanced multiphoton ionization (REMPI) via the 3d Rydberg complex yields state-selective spectra with signal comparable to the intense but diffuse C 3sσ 3Πg ← X 3Σg- (2 + 1) REMPI bands without significant saturation or broadening. The resulting increase in sensitivity permitted observation of the very weak 3dπ 1Δ2 ← X 3Σg- transitions and is independent of the intermediate state. This advance in ionization efficiency and quantum state-selective sensitivity for O2 promises to aid physical and chemical studies across a wide variety of fields.
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Affiliation(s)
- Itai S Kallos
- Department of Physics, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Ilana Bar
- Department of Physics, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Joshua H Baraban
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
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Wang G, Liu T, Zou M, Karsili TNV, Lester MI. UV photodissociation dynamics of the acetone oxide Criegee intermediate: experiment and theory. Phys Chem Chem Phys 2023; 25:7453-7465. [PMID: 36848133 DOI: 10.1039/d3cp00207a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
The photodissociation dynamics of the dimethyl-substituted acetone oxide Criegee intermediate [(CH3)2COO] is characterized following electronic excitation to the bright 1ππ* state, which leads to O (1D) + acetone [(CH3)2CO, S0] products. The UV action spectrum of (CH3)2COO recorded with O (1D) detection under jet-cooled conditions is broad, unstructured, and essentially unchanged from the corresponding electronic absorption spectrum obtained using a UV-induced depletion method. This indicates that UV excitation of (CH3)2COO leads predominantly to the O (1D) product channel. A higher energy O (3P) + (CH3)2CO (T1) product channel is not observed, although it is energetically accessible. In addition, complementary MS-CASPT2 trajectory surface-hopping (TSH) simulations indicate minimal population leading to the O (3P) channel and non-unity overall probability for dissociation (within 100 fs). Velocity map imaging of the O (1D) products is utilized to reveal the total kinetic energy release (TKER) distribution upon photodissociation of (CH3)2COO at various UV excitation energies. Simulation of the TKER distributions is performed using a hybrid model that combines an impulsive model with a statistical component, the latter reflecting the longer-lived (>100 fs) trajectories identified in the TSH calculations. The impulsive model accounts for vibrational activation of (CH3)2CO arising from geometrical changes between the Criegee intermediate and the carbonyl product, indicating the importance of CO stretch, CCO bend, and CC stretch along with activation of hindered rotation and rock of the methyl groups in the (CH3)2CO product. Detailed comparison is also made with the TKER distribution arising from photodissociation dynamics of CH2OO upon UV excitation.
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Affiliation(s)
- Guanghan Wang
- Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104-6323, USA.
| | - Tianlin Liu
- Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104-6323, USA.
| | - Meijun Zou
- Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104-6323, USA.
| | - Tolga N V Karsili
- Department of Chemistry, University of Louisiana at Lafayette, Lafayette, LA 70504, USA.
| | - Marsha I Lester
- Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104-6323, USA.
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REMPI detection of singlet oxygen 1O2 arising from UV-photodissociation of van der Waals complex isoprene-oxygen C5H8-O2. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2017.12.050] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Merrill WG, Crim FF, Case AS. Dynamics and yields for CHBrCl2photodissociation from 215–265 nm. Phys Chem Chem Phys 2016; 18:32999-33008. [PMID: 27886282 DOI: 10.1039/c6cp05061a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We characterize the energy partitioning and spin–orbit yields for CHBrCl2photodissociation. Resonance enhanced multiphoton ionization selectively detects the Br and Br* product channels. Time of flight mass spectrometry and velocity-map imaging permit measurement of relative quantum yields, as well as kinetic and internal energy distributions. We further interpret the energy partitioning through use of impulsive models.
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Affiliation(s)
- Wyatt G. Merrill
- Department of Chemistry
- University of Wisconsin – Madison
- Madison
- USA
| | - F. Fleming Crim
- Department of Chemistry
- University of Wisconsin – Madison
- Madison
- USA
| | - Amanda S. Case
- Department of Chemistry
- University of Wisconsin – Madison
- Madison
- USA
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Li H, Fang Y, Kidwell NM, Beames JM, Lester MI. UV Photodissociation Dynamics of the CH3CHOO Criegee Intermediate: Action Spectroscopy and Velocity Map Imaging of O-Atom Products. J Phys Chem A 2015; 119:8328-37. [DOI: 10.1021/acs.jpca.5b05352] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hongwei Li
- Department
of Chemistry, University of Pennsylvania, Philadelphia Pennsylvania 19104-6323, United States
| | - Yi Fang
- Department
of Chemistry, University of Pennsylvania, Philadelphia Pennsylvania 19104-6323, United States
| | - Nathanael M. Kidwell
- Department
of Chemistry, University of Pennsylvania, Philadelphia Pennsylvania 19104-6323, United States
| | - Joseph M. Beames
- Department
of Chemistry, University of Pennsylvania, Philadelphia Pennsylvania 19104-6323, United States
| | - Marsha I. Lester
- Department
of Chemistry, University of Pennsylvania, Philadelphia Pennsylvania 19104-6323, United States
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Li H, Fang Y, Beames JM, Lester MI. Velocity map imaging of O-atom products from UV photodissociation of the CH2OO Criegee intermediate. J Chem Phys 2015; 142:214312. [DOI: 10.1063/1.4921990] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Affiliation(s)
- Hongwei Li
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, USA
| | - Yi Fang
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, USA
| | - Joseph M. Beames
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, USA
| | - Marsha I. Lester
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, USA
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Conde AP, Montero R, Ovejas V, Fernández-Fernández M, Castaño F, Longarte A. Ultrafast dynamics of the ns (n = 3,4) and 3d Rydberg states of O2. Phys Chem Chem Phys 2013; 15:4914-20. [DOI: 10.1039/c3cp44380a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Multiphoton Ionization State Selection: Vibrational-Mode and Rotational-State Control. ADVANCES IN CHEMICAL PHYSICS 2007. [DOI: 10.1002/9780470141397.ch2] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/28/2023]
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Sheard HA, Ridley T, Lawley KP, Donovan RJ. An optical–optical double-resonance study of the Rydberg states of O2. I. The ns and nd (gerade) states excited via single-rotational levels of the b 1Σ0g+ valence state. J Chem Phys 2003. [DOI: 10.1063/1.1566948] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Morrill JS, Ginter ML, Lewis BR, Gibson ST. The (X 2Πg) nsσg 1,3Πg Rydberg states of O2: Spectra, structures, and interactions. J Chem Phys 1999. [DOI: 10.1063/1.479264] [Citation(s) in RCA: 40] [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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Parker DH, Eppink ATJB. Photoelectron and photofragment velocity map imaging of state-selected molecular oxygen dissociation/ionization dynamics. J Chem Phys 1997. [DOI: 10.1063/1.474624] [Citation(s) in RCA: 204] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Fehér M, Martin P. Ab initio calculation of the electrical properties of the X2Πg ground state of O2+. Chem Phys Lett 1996. [DOI: 10.1016/0009-2614(96)00932-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Glab WL, Dehmer PM, Dehmer JL. Spin–orbit branching ratios for photoionization of the 3dπ gerade states of O2: Evidence for preferential ionization of the Ωc=3/2 core states. J Chem Phys 1996. [DOI: 10.1063/1.471126] [Citation(s) in RCA: 17] [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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Posey LA, Guettler RD, Kirchner NJ, Zare RN. Influence of vibrational excitation and collision energy on the ion‐molecule reaction NH+3(ν2)+ND3. J Chem Phys 1994. [DOI: 10.1063/1.467494] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Wang Y, Woodward CA, Chupka WA. Ionic state preparation of O+2 via the 3dδ 1,3Φg Rydberg states of O2. Chem Phys Lett 1993. [DOI: 10.1016/0009-2614(93)85636-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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van der Zande WJ. The vibrational constant of the O22+ X 1Σg+ state from the dissociative decay of n = 3, 4 Rydberg states in O2+. Chem Phys 1991. [DOI: 10.1016/0301-0104(91)87152-l] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Chung S, Lin CC, Lee ET. Electron-impact excitation of the Rydberg levels of the oxygen molecule. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1990; 42:4391-4394. [PMID: 9904541 DOI: 10.1103/physreva.42.4391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Park H, Li L, Chupka WA, Lefebvre‐Brion H. Two‐photon spectroscopy of the 3d Rydberg states of O2: 1Φg and 3Φg states. J Chem Phys 1990. [DOI: 10.1063/1.458404] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Stephens JA, Braunstein M, McKoy V. Multiplet‐specific shape resonance and autoionization effects in (2+1) resonance enhanced multiphoton ionization of O2 via the d 1Πg state. J Chem Phys 1990. [DOI: 10.1063/1.458511] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Park H, Li L, Chupka WA. Identification of the 3dπ 1Δgand3Δ2gRydberg state of O2by multiphoton ionization and polarization studies. J Chem Phys 1990. [DOI: 10.1063/1.458412] [Citation(s) in RCA: 16] [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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Ogorzalek Loo R, Marinelli WJ, Houston PL, Arepalli S, Wiesenfeld JR, Field RW. Multiphoton ionization of O2 X 3Σ−g, a 1Δg, and b 1Σ+g via the two‐photon resonant nsσg, ndσg, and ndπg Rydberg levels. J Chem Phys 1989. [DOI: 10.1063/1.457589] [Citation(s) in RCA: 57] [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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Park H, Li L, Chupka WA. Observation and analysis of the 3dπ1Σg+ rydberg state of O2 by (2+1) multiphoton ionization. Chem Phys Lett 1989. [DOI: 10.1016/0009-2614(89)87051-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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