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Zhang R, Chen J, Yan S, Jie W, Ning C. Photodetachment and Tunneling Dissociation of Cryogenic Double-Rydberg Anions NH 4. J Phys Chem Lett 2024; 15:5612-5617. [PMID: 38758204 DOI: 10.1021/acs.jpclett.4c01168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
The Rydberg radical NH4 and the double Rydberg anion (DRA) NH4- have long aroused researchers' interests due to their potential for exploring the reaction dynamics of the H + NH3 → H2 + NH2 reaction, a prototypical penta-atomic system. In this study, we present high-resolution photodetachment spectroscopy of DRA NH4- and ion-molecule complex H-(NH3). We observed multiple new photodetachment channels of DRA NH4-. The energy level of the excited state (3p 2T2) of the Rydberg radical NH4 was determined to be 15052(94) cm-1, in excellent agreement with the principal Schüler band (15061.61 cm-1). Additionally, we observed the tunneling dissociation of NH4- in a cryogenic ion trap with its dissociation lifetime determined to be 19(2) ms.
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Affiliation(s)
- Rui Zhang
- Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Frontier Science Center for Quantum Information, Tsinghua University, Beijing 100084, China
| | - Jiayi Chen
- Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Frontier Science Center for Quantum Information, Tsinghua University, Beijing 100084, China
| | - Shuaiting Yan
- Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Frontier Science Center for Quantum Information, Tsinghua University, Beijing 100084, China
| | - Wenru Jie
- Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Frontier Science Center for Quantum Information, Tsinghua University, Beijing 100084, China
| | - Chuangang Ning
- Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Frontier Science Center for Quantum Information, Tsinghua University, Beijing 100084, China
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Li J, Guo H. A nine-dimensional global potential energy surface for NH4(X2A1) and kinetics studies on the H + NH3 ↔ H2 + NH2 reaction. Phys Chem Chem Phys 2014; 16:6753-63. [DOI: 10.1039/c4cp00241e] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A nine-dimensional global potential energy surface (PES) for the NH4 system is developed from ∼105 high-level ab initio points and the hydrogen abstraction kinetics on the PES agree with experiment.
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Affiliation(s)
- Jun Li
- Department of Chemistry and Chemical Biology
- University of New Mexico
- Albuquerque, USA
| | - Hua Guo
- Department of Chemistry and Chemical Biology
- University of New Mexico
- Albuquerque, USA
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Ortiz JV, Martin I, Velasco AM, Lavin C. Ground and excited states of NH4: Electron propagator and quantum defect analysis. J Chem Phys 2004; 120:7949-54. [PMID: 15267710 DOI: 10.1063/1.1689646] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Vertical excitation energies of the Rydberg radical NH4 are inferred from ab initio electron propagator calculations on the electron affinities of NH4+. The adiabatic ionization energy of NH4 is evaluated with coupled-cluster calculations. These predictions provide optimal parameters for the molecular-adapted quantum defect orbital method, which is used to determine Einstein emission coefficients and radiative lifetimes. Comparisons with spectroscopic data and previous calculations are discussed.
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Affiliation(s)
- J V Ortiz
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506-3701, USA.
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Tureček F. Transient Intermediates of Chemical Reactions by Neutralization-Reionization Mass Spectrometry. Top Curr Chem (Cham) 2003. [DOI: 10.1007/3-540-36113-8_3] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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Turecek F. Stereochemical interactions in ammonium dications, hypervalent diammonium cation-radicals and ammonium radicals. A B3-MP2 computational study. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2003; 9:267-277. [PMID: 12939479 DOI: 10.1255/ejms.548] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Hypervalent ammonium radicals and cation-radicals derived from cis and trans-cyclopentane-1,2-diamine have been studied computationally with the goal of elucidating intramolecular interactions between the ammonium and amine functional groups in a conformationally rigid model system. Hypervalent cis and trans-cyclopentane-1-ammonium-2-amine radicals are only marginally stable against dissociation by loss of an ammonium hydrogen atom and ammonia. The radicals are predicted to exhibit very similar dissociations originating from the ground and excited electronic states. The dissociation and transition state energies in bifunctional hypervalent ammonium radicals are analogous to those reported previously for monofunctional ammonium radicals. Stereochemical effects are predicted to occur in the formation and dissociations of hypervalent cis and trans-cyclopentane-1,2-diammonium cation-radicals. The cis-isomer is calculated to undergo very facile elimination of dihydrogen resulting from a dipolar H(+)....H(-) interaction between the ammonium groups. The trans-isomer is predicted to spontaneously dissociate to a complex of cyclopentene cation-radical and two ammonia molecules.
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Affiliation(s)
- Frantisek Turecek
- Department of Chemistry, Bagley Hall, Box 351700, University of Washington, Seattle, WA 981195-1700, USA
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Sattelmeyer KW, Schaefer HF, Stanton JF. The equilibrium structure of the ammonium radical Rydberg ground state. J Chem Phys 2001. [DOI: 10.1063/1.1371259] [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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7
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Park JK. Avoided curve crossing for the dissociation of the Rydberg NH4 radical into (NH3+H). J Chem Phys 1997. [DOI: 10.1063/1.474942] [Citation(s) in RCA: 13] [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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Nguyen VQ, Sadilek M, Ferrier J, Frank AJ, Tureček F. Metastable States of Dimethylammonium, (CH3)2NH2•. J Phys Chem A 1997. [DOI: 10.1021/jp964077e] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Viet Q. Nguyen
- Department of Chemistry, Bagley Hall, Box 351700, University of Washington, Seattle, Washington 98195-1700
| | - Martin Sadilek
- Department of Chemistry, Bagley Hall, Box 351700, University of Washington, Seattle, Washington 98195-1700
| | - Jordan Ferrier
- Department of Chemistry, Bagley Hall, Box 351700, University of Washington, Seattle, Washington 98195-1700
| | - Aaron J. Frank
- Department of Chemistry, Bagley Hall, Box 351700, University of Washington, Seattle, Washington 98195-1700
| | - František Tureček
- Department of Chemistry, Bagley Hall, Box 351700, University of Washington, Seattle, Washington 98195-1700
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Signorell R, Palm H, Merkt F. Structure of the ammonium radical from a rotationally resolved photoelectron spectrum. J Chem Phys 1997. [DOI: 10.1063/1.473653] [Citation(s) in RCA: 56] [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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Martin I, Lavin A, Velasco M, Martin M, Karwowski J, Diercksen G. Quantum defect orbital study of electronic transitions in Rydberg molecules: ammonium and fluoronium radicals. Chem Phys 1996. [DOI: 10.1016/0301-0104(95)00370-3] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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11
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Cardy H, Liotard D, Dargelos A, Marinelli F, Roche M. Ab initio CI study of the emission spectrum and the vibronic coupling in the 3p 2T2 state of the ammonium radical. Chem Phys 1988. [DOI: 10.1016/0301-0104(88)87033-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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12
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The stability and specrta of isotopic forms of the ammonium radical: An ab initio CI study of the dissociation barrier. Chem Phys 1985. [DOI: 10.1016/0301-0104(85)80196-8] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Gallas J, Leuchs G, Walther H, Figger H. Rydberg Atoms: High-Resolution Spectroscopy and Radiation Interaction—Rydberg Molecules. ACTA ACUST UNITED AC 1985. [DOI: 10.1016/s0065-2199(08)60272-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
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Kaspar J, Smith VH. Rydberg transitions in the ammonium radical: Scattered-wave local-spin-density calculations. Chem Phys 1984. [DOI: 10.1016/0301-0104(84)85080-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Gellene GI, Cleary DA, Porter RF. Stability of the ammonium and methylammonium radicals from neutralized ion‐beam spectroscopy. J Chem Phys 1982. [DOI: 10.1063/1.444291] [Citation(s) in RCA: 100] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Broclawik E, Mrozek J, Smith VH. A quantum chemical investigation of the ammonium radical. I. SCF-Xα-SW calculations of the electronic structure and Rydberg spectra. Chem Phys 1982. [DOI: 10.1016/0301-0104(82)88042-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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GDCh-Ostsverband Süd-Württemberg, Tübingen. Angew Chem Int Ed Engl 1955. [DOI: 10.1002/ange.19550671124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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