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Fletcher JD, Lanfri L, Ritchie GAD, Hancock G, Islam M, Richmond G. Time-resolved observations of vibrationally excited NO X 2Π ( v') formed from collisional quenching of NO A 2Σ + ( v = 0) by NO X 2Π: evidence for the participation of the NO a 4Π state. Phys Chem Chem Phys 2021; 23:20478-20488. [PMID: 34498634 DOI: 10.1039/d1cp03360c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Time-resolved observations have been made of the formation of vibrationally excited NO X 2Π (v') following collisional quenching of NO A 2Σ+ (v = 0) by NO X 2Π (v = 0). Two time scales are observed, namely a fast production rate consistent with direct formation from the quenching of the electronically excited NO A state, together with a slow component, the magnitude and rate of formation of which depend upon NO pressure. A reservoir state formed by quenching of NO A 2Σ+ (v = 0) is invoked to explain the observations, and the available evidence points to this state being the first electronically excited state of NO, a 4Π. The rate constant for quenching of the a 4Π state to levels v' = 11-16 by NO is measured as (8.80 ± 1.1) × 10-11 cm3 molecule-1 s-1 at 298 K where the error quoted is two standard deviations, and from measurements of the increased formation of high vibrational levels of NO(X) by the slow process we estimate a lower limit for the fraction of self-quenching collisions of NO A 2Σ+ (v = 0) which lead to NO a 4Π as 19%.
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Affiliation(s)
- James D Fletcher
- Department of Chemistry, Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford OX1 3QZ, UK.
| | - Lucia Lanfri
- Universidad Nacional de Córdoba, INFIQC CONICET, Córdoba, Argentina
| | - Grant A D Ritchie
- Department of Chemistry, Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford OX1 3QZ, UK.
| | - Gus Hancock
- Department of Chemistry, Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford OX1 3QZ, UK.
| | - Meez Islam
- School of Science and Engineering, Teesside University, Middlesbrough, TS1 3BA, UK
| | - Graham Richmond
- Department of Chemistry, Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford OX1 3QZ, UK.
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Park GB, Krüger BC, Meyer S, Wodtke AM, Schäfer T. A 1 + 1′ resonance-enhanced multiphoton ionization scheme for rotationally state-selective detection of formaldehyde via the à 1A2 ← X̃ 1A1 transition. Phys Chem Chem Phys 2016; 18:22355-63. [DOI: 10.1039/c6cp03833f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The new 1 + 1′ REMPI scheme is well-suited for sensitive determination of rotational state distributions in formaldehyde.
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Affiliation(s)
- G. Barratt Park
- Institute for Physical Chemistry
- University of Göttingen
- 37077 Göttingen
- Germany
- Max Planck Institute for Biophysical Chemistry
| | - Bastian C. Krüger
- Institute for Physical Chemistry
- University of Göttingen
- 37077 Göttingen
- Germany
| | - Sven Meyer
- Institute for Physical Chemistry
- University of Göttingen
- 37077 Göttingen
- Germany
| | - Alec M. Wodtke
- Institute for Physical Chemistry
- University of Göttingen
- 37077 Göttingen
- Germany
- Max Planck Institute for Biophysical Chemistry
| | - Tim Schäfer
- Institute for Physical Chemistry
- University of Göttingen
- 37077 Göttingen
- Germany
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3
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Golibrzuch K, Kandratsenka A, Rahinov I, Cooper R, Auerbach DJ, Wodtke AM, Bartels C. Experimental and Theoretical Study of Multi-Quantum Vibrational Excitation: NO(v = 0→1,2,3) in Collisions with Au(111). J Phys Chem A 2013; 117:7091-101. [DOI: 10.1021/jp400313b] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kai Golibrzuch
- Institute for Physical Chemistry, Georg August University, Tammannstraße 6, 37077
Göttingen, Germany
| | - Alexander Kandratsenka
- Institute for Physical Chemistry, Georg August University, Tammannstraße 6, 37077
Göttingen, Germany
- Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - Igor Rahinov
- Department of Natural Sciences, The Open University of Israel, Raanana, Israel
| | - Russell Cooper
- Institute for Physical Chemistry, Georg August University, Tammannstraße 6, 37077
Göttingen, Germany
| | - Daniel J. Auerbach
- Institute for Physical Chemistry, Georg August University, Tammannstraße 6, 37077
Göttingen, Germany
- Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
- Department of Chemistry and
Biochemistry, University of California,
Santa Barbara, California, United States
| | - Alec M. Wodtke
- Institute for Physical Chemistry, Georg August University, Tammannstraße 6, 37077
Göttingen, Germany
- Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
- Department of Chemistry and
Biochemistry, University of California,
Santa Barbara, California, United States
| | - Christof Bartels
- Institute for Physical Chemistry, Georg August University, Tammannstraße 6, 37077
Göttingen, Germany
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Cooper R, Li Z, Golibrzuch K, Bartels C, Rahinov I, Auerbach DJ, Wodtke AM. On the determination of absolute vibrational excitation probabilities in molecule-surface scattering: Case study of NO on Au(111). J Chem Phys 2012; 137:064705. [DOI: 10.1063/1.4738596] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Headrick JM, Reichardt TA, Settersten TB, Bambha RP, Kliner DAV. Application of laser photofragmentation-resonance enhanced multiphoton ionization to ion mobility spectrometry. APPLIED OPTICS 2010; 49:2204-2214. [PMID: 20390024 DOI: 10.1364/ao.49.002204] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We demonstrate detection of nitro-containing compounds with laser photofragmentation (PF) coupled with resonance enhanced multiphoton ionization (REMPI) and ion mobility spectrometry (IMS). In PF-REMPI, a laser dissociates the parent molecules, producing fragments that can then be ionized by absorption of additional laser photons. The production of these ions strongly depends on the wavelength of laser light, with ion yields corresponding to the absorption spectrum of the fragments [nitric oxide (NO) in the present case]. Combining IMS with PF-REMPI provides further specificity, separating ions according to their mobilities through an atmospheric-pressure drift tube. In this work, we use a pulsed UV laser to examine the characteristics of atmospheric-pressure PF-REMPI, the chemistry occurring in the ionization region and drift tube, and the viability of detecting ions created by both resonance-enhanced and nonresonant ionization. Probing NO in a helium-nitrogen bath, we demonstrate that the detection of ions displays single-shot response to changes in ion generation, with an ion extraction-to-collection efficiency of approximately 12%. We then evaluate the sensitivity and specificity of PF-REMPI/IMS as applied to the detection of both the explosive surrogate 2, 4-dinitrotoluene and the nuisance compound nitrobenzene.
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Affiliation(s)
- Jeffrey M Headrick
- Sandia National Laboratories, P.O. Box 969, MS 9056, Livermore, California 94551, USA
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Wilkinson I, Garcia IA, Whitaker BJ, Hamard JB, Blanchet V. The photodissociation of NO2 by visible and ultraviolet light. Phys Chem Chem Phys 2010; 12:15766-79. [DOI: 10.1039/c0cp01551b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Polyakova E, Stolyarov D, Wittig C. Multiple photon excitation and ionization of NO in and on helium droplets. J Chem Phys 2006; 124:214308. [PMID: 16774408 DOI: 10.1063/1.2198844] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The photoexcitation of NO embedded in superfluid Hen nanodroplets having n approximately 10(4) has been examined. Two-photon excitation prepares electronically excited states (NO(*)), most notably, the embedded analog of the A 2Sigma state of gas phase NO. Vertical excitation to this low Rydberg state is blueshifted and broadened relative to its gas phase counterpart because of the repulsive electron-helium interaction. Transport to the droplet surface is believed to be facile in the superfluid. For example, NO* prefers (energetically) to reside at the droplet surface rather than at the droplet center, in contrast to NO. Photoionization of surface-bound NO* occurs over a significant photon energy range. This yields small cluster ions NO+Hek) with approximately 90% of these clusters having k< or =10. The variation of ion yield with photon energy displays a precipitous change in the region of 24 300-24 400 cm(-1) for all values of k. Possible photoionization mechanisms are discussed and it is suggested that intermediate levels with high-n Rydberg character play a role. This work underscores the important role played by transport in the photophysics of species embedded in the superfluid host.
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Affiliation(s)
- E Polyakova
- Department of Chemistry, Columbia University, New York, New York 10027, USA
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Settersten TB, Patterson BD, Kronemayer H, Sick V, Schulz C, Daily JW. Branching ratios for quenching of nitric oxide A2Σ+(ν′ = 0) to X2Π(ν″ = 0). Phys Chem Chem Phys 2006; 8:5328-38. [DOI: 10.1039/b608619e] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Luque J, Crosley DR. Transition probabilities and electronic transition moments of the A 2Σ+–X 2Π and D 2Σ+–X 2Π systems of nitric oxide. J Chem Phys 1999. [DOI: 10.1063/1.480064] [Citation(s) in RCA: 100] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Eichhorn G, Richter M, Al-Shamery K, Zacharias H. Femtosecond ultraviolet laser-induced desorption of NO from NiO(100)/Ni(100). J Chem Phys 1999. [DOI: 10.1063/1.479281] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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11
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Eichhorn G, Richter M, Al-Shamery K, Zacharias H. Time-correlated laser desorption of NO from NiO(100)/Ni(100). Chem Phys Lett 1998. [DOI: 10.1016/s0009-2614(98)00418-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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