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Jin J, Grellmann M, Asmis KR. Nuclear quantum dynamics on the ground electronic state of neutral silver dimer 107Ag 109Ag probed by femtosecond NeNePo spectroscopy. Phys Chem Chem Phys 2023; 25:24313-24320. [PMID: 37664952 DOI: 10.1039/d3cp02055j] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
The nuclear quantum dynamics on the ground electronic state of the neutral silver dimer 107Ag109Ag are studied by femtosecond (fs) pump-probe spectroscopy using the 'negative ion - to neutral - to positive ion' (NeNePo) excitation scheme. A vibrational wave packet is prepared on the X1Σ+g state of Ag2via photodetachment of mass-selected, cryogenically cooled Ag2- using a first ultrafast pump laser pulse. The temporal evolution of the wave packet is then probed by an ultrafast probe pulse via resonant multiphoton ionization to Ag2+. Frequency analysis of the fs-NeNePo spectra obtained for a single isotopologue and pump-probe delay times up to 60 ps yields the harmonic (ωe = 192.2 cm-1), quadratic anharmonic (ωexe = 0.637 cm-1) and cubic anharmonic (ωeye = 3 × 10-4 cm-1) constants for the X1Σ+g state of neutral Ag2. The fs-NeNePo spectra obtained at different pump wavelengths provide insight into the excitation mechanism. At a pump wavelength of 510 nm instead of 1010 nm, resonant excitation of a short-lived electronically excited state of the anion followed by autodetachment results in population of higher-energy vibrational levels of the neutral ground state. In contrast, at 1140 nm dynamics with a slightly shorter beating period and different relative phase are observed. The present study demonstrates that isotopologue-specific fs-NeNePo spectroscopy provides accurate vibrational constants of mass-selected neutral clusters in their electronic ground state in the terahertz spectral region, which remains difficult to obtain directly in the frequency domain with any other type of spectroscopy of comparable sensitivity.
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Affiliation(s)
- Jiaye Jin
- Wilhelm-Ostwald-Institut für Physikalische und Theoretisch Chemie, Universität Leipzig, Linnéstr. 2, 04103 Leipzig, Germany.
| | - Max Grellmann
- Wilhelm-Ostwald-Institut für Physikalische und Theoretisch Chemie, Universität Leipzig, Linnéstr. 2, 04103 Leipzig, Germany.
| | - Knut R Asmis
- Wilhelm-Ostwald-Institut für Physikalische und Theoretisch Chemie, Universität Leipzig, Linnéstr. 2, 04103 Leipzig, Germany.
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Heid M, Chen T, Pausch R, Schwoerer H, Kiefer W. Ultrafast Coherent Control in the Electronic Ground State of a Molecule. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200000087] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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3
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Wang D, Larson Å, Karlsson HO, Hansson T. Molecular quantum wavepacket revivals in coupled electronic states. Chem Phys Lett 2007. [DOI: 10.1016/j.cplett.2007.10.068] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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4
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Soorkia S, Le Quéré F, Léonard C, Figgen D. Ab initiostudy of the spin–orbit coupling between the A and b3Πuelectronic states of Na2. Mol Phys 2007. [DOI: 10.1080/00268970601161574] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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5
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Claas P, Droppelmann G, Schulz CP, Mudrich M, Stienkemeier F. Wave Packet Dynamics in Triplet States of Na2 Attached to Helium Nanodroplets. J Phys Chem A 2007; 111:7537-41. [PMID: 17461563 DOI: 10.1021/jp070893i] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The dynamics of vibrational wave packets excited in Na2 dimers in the triplet ground and excited states is investigated by means of helium nanodroplet isolation (HENDI) combined with femtosecond pump-probe spectroscopy. Different pathways in the employed resonant multiphoton ionization scheme are identified. Within the precision of the method, the wave packet dynamics appears to be unperturbed by the helium droplet environment.
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Affiliation(s)
- Patrick Claas
- Fakultät für Physik, Universität Bielefeld, 33615 Bielefeld, Germany
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6
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Sanrey M, Joyeux M. Slow periodic oscillations in time domain dynamics of NO2. J Chem Phys 2007; 126:074301. [PMID: 17328599 DOI: 10.1063/1.2446920] [Citation(s) in RCA: 16] [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 authors investigated the time domain nonadiabatic dynamics of NO2 on the coupled X 2A1 and A 2B2 electronic states by launching wave packets on the excited electronic state and focused on the evolution at long times (t>200 fs), which has received little attention up to now. The authors showed that the initial fast spreading of the wave packets is followed at all energies by slow periodic intramolecular vibronic energy redistribution (IVER) with periods in the range of 0.3 to several tens of picoseconds. These energy transfers lead to oscillations with the same periods in the population of each electronic state. Propagation of wave packets indicates that IVER frequencies also dominate the fluctuations of the squared modulus of the autocorrelation function |A(t)|2 at energies not too high above the bottom of the conical intersection, but this is no longer the case at higher energies. For example, for initial wave packets prepared by almost vertical excitation of the vibrational ground state of the ground electronic surface, the oscillations of |A(t)|2 essentially reflect the detuning from 1:2 resonance between the frequency of the bend and that of the symmetric stretch in the excited electronic state. These theoretical results were used to discuss the possible origin of the low-frequency oscillations which were recently observed in time domain experimental spectra of NO2.
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Affiliation(s)
- Michaël Sanrey
- Laboratoire de Spectrométrie Physique (CNRS UMR5588), Université Joseph Fourier, BP 87, 38402 St. Martin d'Hères, France
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Gühr M, Bargheer M, Fushitani M, Kiljunen T, Schwentner N. Ultrafast dynamics of halogens in rare gas solids. Phys Chem Chem Phys 2007; 9:779-801. [PMID: 17287873 DOI: 10.1039/b609058n] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We perform time resolved pump-probe spectroscopy on small halogen molecules ClF, Cl2, Br2, and I2 embedded in rare gas solids (RGS). We find that dissociation, angular depolarization, and the decoherence of the molecule is strongly influenced by the cage structure. The well ordered crystalline environment facilitates the modelling of the experimental angular distribution of the molecular axis after the collision with the rare gas cage. The observation of many subsequent vibrational wave packet oscillations allows the construction of anharmonic potentials and indicate a long vibrational coherence time. We control the vibrational wave packet revivals, thereby gaining information about the vibrational decoherence. The coherence times are remarkable larger when compared to the liquid or high pressure gas phase. This fact is attributed to the highly symmetric molecular environment of the RGS. The decoherence and energy relaxation data agree well with a perturbative model for moderate vibrational excitation and follow a classical model in the strong excitation limit. Furthermore, a wave packet interferometry scheme is applied to deduce electronic coherence times. The positions of those cage atoms, excited by the molecular electronic transitions are modulated by long living coherent phonons of the RGS, which we can probe via the molecular charge transfer states.
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Affiliation(s)
- M Gühr
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195, Berlin, Germany
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Thoss M, Wang H. SEMICLASSICAL DESCRIPTION OF MOLECULAR DYNAMICS BASED ON INITIAL-VALUE REPRESENTATION METHODS. Annu Rev Phys Chem 2004; 55:299-332. [PMID: 15117255 DOI: 10.1146/annurev.physchem.55.091602.094429] [Citation(s) in RCA: 137] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Recent progress in the development of semiclassical methods to describe quantum effects in molecular dynamics is reviewed. Focusing on rigorous semiclassical methods that are based on the initial-value representation of the semiclassical propagator, we discuss several promising schemes that have been developed in the past few years to extend the applicability of semiclassical approaches to complex molecular systems. In particular, integral-filtering techniques and forward-backward methods are surveyed. Furthermore, recently proposed approaches that allow the semiclassical description of nonadiabatic molecular dynamics are discussed. The potential and efficiency of these methods is illustrated by selected applications.
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Affiliation(s)
- Michael Thoss
- Theoretische Chemie, Technische Universitat Munchen, D-85747 Garching, Germany.
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Affiliation(s)
- T E Dermota
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
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Vajda S, Lupulescu C, Merli A, Budzyn F, Wöste L, Hartmann M, Pittner J, Bonacić-Koutecký V. Observation and theoretical description of periodic geometric rearrangement in electronically excited nonstoichiometric sodium-fluoride clusters. PHYSICAL REVIEW LETTERS 2002; 89:213404. [PMID: 12443410 DOI: 10.1103/physrevlett.89.213404] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2002] [Indexed: 05/24/2023]
Abstract
We present two-color fs pump-probe spectra of Na2F which were recorded by employing excitation wavelengths around 1208 nm (pump) and ionization wavelengths around 405 nm (probe). The observed oscillatory structure of the signal with a period of 185 fs shows an excellent agreement with our simulated spectra. The employed ab initio Wigner distribution approach provides clear evidence that this observation is caused by photoinduced metal bond breaking followed by a butterfly-type periodic geometric rearrangement.
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Affiliation(s)
- Stefan Vajda
- Freie-Universität Berlin, Fachbereich Physik, Arnimallee 14, 14195 Berlin, Germany
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Vajda Š, Bartelt A, Kaposta EC, Leisner T, Lupulescu C, Minemoto S, Rosendo-Francisco P, Wöste L. Feedback optimization of shaped femtosecond laser pulses for controlling the wavepacket dynamics and reactivity of mixed alkaline clusters. Chem Phys 2001. [DOI: 10.1016/s0301-0104(01)00275-0] [Citation(s) in RCA: 89] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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12
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Abstract
Time-resolved photoelectron spectroscopy (TRPES) has become a powerful new tool in studying the dynamics of molecules and clusters. It has been applied to processes ranging from energy flow in electronically excited states of molecules to electron solvation dynamics in clusters. This review covers experimental and theoretical aspects of TRPES, focusing on studies of neutral and negatively charged species.
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Affiliation(s)
- D M Neumark
- Department of Chemistry, University of California, Berkeley, California 94720, USA.
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Stavros VG, Fielding HH. Calculations of the dynamics of phase-locked vibrational wave packets in Na2+: Young’s double slit experiment in a molecule. J Chem Phys 2000. [DOI: 10.1063/1.481554] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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Nicole C, Bouchène MA, Meier C, Magnier S, Schreiber E, Girard B. Competition of different ionization pathways in K2 studied by ultrafast pump–probe spectroscopy: A comparison between theory and experiment. J Chem Phys 1999. [DOI: 10.1063/1.480121] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
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15
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Pausch R, Heid M, Chen T, Kiefer W, Schwoerer H. Selective generation and control of excited vibrational wave packets in the electronic ground state of K2. J Chem Phys 1999. [DOI: 10.1063/1.478921] [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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16
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Chen T, Engel V, Heid M, Kiefer W, Knopp G, Materny A, Meyer S, Pausch R, Schmitt M, Schwoerer H, Siebert T. Determination of wave packet dynamics by femtosecond time-resolved pump-dump-probe and four-wave mixing techniques. J Mol Struct 1999. [DOI: 10.1016/s0022-2860(98)00651-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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17
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Andersson L, Karlsson HO, Goscinski O, Berg LE, Beutter M, Hansson T. Vibrational wave packet dynamics in NaK: The A state. Chem Phys 1999. [DOI: 10.1016/s0301-0104(98)00404-2] [Citation(s) in RCA: 8] [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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18
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Davidsson J, Hansson T, Mukhtar E. Ultrafast multiphoton ionization dynamics and control of NaK molecules. J Chem Phys 1998. [DOI: 10.1063/1.477773] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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Meier C, Engel V, Manthe U. An effective method for the quantum mechanical description of photoionization with ultrashort intense laser pulses. J Chem Phys 1998. [DOI: 10.1063/1.476537] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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Schwoerer H, Pausch R, Heid M, Kiefer W. Femtosecond vibrational wavepacket spectroscopy in the electronic ground state of K2. Chem Phys Lett 1998. [DOI: 10.1016/s0009-2614(98)00048-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Schwoerer H, Pausch R, Heid M, Engel V, Kiefer W. Femtosecond time-resolved two-photon ionization spectroscopy of K2. J Chem Phys 1997. [DOI: 10.1063/1.475271] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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22
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Rubner O, Meier C, Engel V. The calculation of time-resolved negative-ion-to-neutral-to-positive-ion-spectra with an application to iron-carbonyl. J Chem Phys 1997. [DOI: 10.1063/1.474454] [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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Heufelder J, Ruppe H, Rutz S, Schreiber E, Wöste L. Fractional revivals of vibrational wave packets in the NaK A1∑+ state. Chem Phys Lett 1997. [DOI: 10.1016/s0009-2614(97)00240-6] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Rutz S, Schreiber E. Fractional revivals of wave packets in the A1∑u+ state of K2. A comparison of two different pump and probe cycles by spectrograms. Chem Phys Lett 1997. [DOI: 10.1016/s0009-2614(97)00241-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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