1
|
Murakami T, Takayanagi T. Computational study of the post-transition state dynamics for the OH + CH 3OH reaction probed by photodetachment of the CH 3O -(H 2O) anion. Phys Chem Chem Phys 2024; 26:19195-19206. [PMID: 38956990 DOI: 10.1039/d4cp01466a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/04/2024]
Abstract
Dissociative photodetachment dynamics simulations were conducted to study the CH3O-(H2O) → CH3O + H2O + e- reaction using classical molecular dynamics (MD) and ring-polymer molecular dynamics (RPMD) techniques on two newly formulated neutral potential energy surfaces (PES1 and PES2) by different research groups. While the dissociation dynamics exhibited similarities between classical MD and RPMD, there were noticeable differences in the fluctuation of probability densities for the internal modes due to nuclear quantum effects. Upon comparison of our findings with experimental data concerning the electron binding energy distribution and photofragment relative energy, it suggests that the potential energy landscapes of PES2 are reasonably precise. The time evolution of occupied vibrational states of the H2O photofragment is presented in this study.
Collapse
Affiliation(s)
- Tatsuhiro Murakami
- Department of Chemistry, Saitama University, Shimo-Okubo 255, Sakura-ku, Saitama City, Saitama, 338-8570, Japan.
- Department of Materials & Life Sciences, Faculty of Science & Technology, Sophia University, 7-1 Kioicho, Chiyoda-ku, Tokyo, 102-8554, Japan
| | - Toshiyuki Takayanagi
- Department of Chemistry, Saitama University, Shimo-Okubo 255, Sakura-ku, Saitama City, Saitama, 338-8570, Japan.
| |
Collapse
|
2
|
Zhang R, Yan S, Song H, Guo H, Ning C. Probing the activated complex of the F + NH 3 reaction via a dipole-bound state. Nat Commun 2024; 15:3858. [PMID: 38719855 PMCID: PMC11079065 DOI: 10.1038/s41467-024-48202-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2024] [Accepted: 04/23/2024] [Indexed: 05/12/2024] Open
Abstract
Experimental characterization of the transition state poses a significant challenge due to its fleeting nature. Negative ion photodetachment offers a unique tool for probing transition states and their vicinity. However, this approach is usually limited to Franck-Condon regions. For example, high-lying Feshbach resonances with an excited HF stretching mode (vHF = 2-4) were recently identified in the transition-state region of the F + NH3 → HF + NH2 reaction through photo-detaching FNH3- anions, but the direct photodetachment failed to observe the lower-lying vHF = 0,1 resonances and bound states due apparently to negligible Franck-Condon factors. Indeed, these weak transitions can be resonantly enhanced via a dipole-bound state (DBS) formed between an electron and the polar FNH3 species. In this study, we unveil a series of Feshbach resonances and bound states along the F + NH3 reaction path via a DBS by combining high-resolution photoelectron spectroscopy with high-level quantum dynamical computations. This study presents an approach for probing the activated complex in a reaction by negative ion photodetachment through a DBS.
Collapse
Affiliation(s)
- Rui Zhang
- Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Frontier Science Center for Quantum Information, Tsinghua University, 100084, Beijing, China
| | - Shuaiting Yan
- Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Frontier Science Center for Quantum Information, Tsinghua University, 100084, Beijing, China
| | - Hongwei Song
- State Key Laboratory of Magnetic Resonance Spectroscopy and Imaging, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, 430071, China.
| | - Hua Guo
- Department of Chemistry and Chemical Biology, Center for Computational Chemistry, University of New Mexico, Albuquerque, NM, 87131, USA
| | - Chuangang Ning
- Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Frontier Science Center for Quantum Information, Tsinghua University, 100084, Beijing, China.
| |
Collapse
|
3
|
Yuan DF, Liu Y, Trabelsi T, Zhang YR, Li J, Francisco JS, Guo H, Wang LS. Probing the dynamics and bottleneck of the key atmospheric SO 2 oxidation reaction by the hydroxyl radical. Proc Natl Acad Sci U S A 2024; 121:e2314819121. [PMID: 38285944 PMCID: PMC10861908 DOI: 10.1073/pnas.2314819121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 12/29/2023] [Indexed: 01/31/2024] Open
Abstract
SO2 (Sulfur dioxide) is the major precursor to the production of sulfuric acid (H2SO4), contributing to acid rain and atmospheric aerosols. Sulfuric acid formed from SO2 generates light-reflecting sulfate aerosol particles in the atmosphere. This property has prompted recent geoengineering proposals to inject sulfuric acid or its precursors into the Earth's atmosphere to increase the planetary albedo to counteract global warming. SO2 oxidation in the atmosphere by the hydroxyl radical HO to form HOSO2 is a key rate-limiting step in the mechanism for forming acid rain. However, the dynamics of the HO + SO2 → HOSO2 reaction and its slow rate in the atmosphere are poorly understood to date. Herein, we use photoelectron spectroscopy of cryogenically cooled HOSO2- anion to access the neutral HOSO2 radical near the transition state of the HO + SO2 reaction. Spectroscopic and dynamic calculations are conducted on the first ab initio-based full-dimensional potential energy surface to interpret the photoelectron spectra of HOSO2- and to probe the dynamics of the HO + SO2 reaction. In addition to the finding of a unique pre-reaction complex (HO⋯SO2) directly connected to the transition state, dynamic calculations reveal that the accessible phase space for the HO + SO2 → HOSO2 reaction is extremely narrow, forming a key reaction bottleneck and slowing the reaction rate in the atmosphere, despite the low reaction barrier. This study underlines the importance of understanding the full multidimensional potential energy surface to elucidate the dynamics of complex bimolecular reactions involving polyatomic reactants.
Collapse
Affiliation(s)
- Dao-Fu Yuan
- Hefei National Research Center for Physical Science at Microscale, University of Science and Technology of China, Hefei230026, China
- Department of Chemistry, Brown University, Providence, RI02912
| | - Yang Liu
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing401331, China
- Department of Chemistry and Chemical Biology, Center for Computational Chemistry, University of New Mexico, Albuquerque, NM87131
| | - Tarek Trabelsi
- Department of Earth and Environmental Sciences, University of Pennsylvania, Philadelphia, PA19104
- Department of Chemistry, University of Pennsylvania, Philadelphia, PA19104
| | - Yue-Rou Zhang
- Department of Chemistry, Brown University, Providence, RI02912
| | - Jun Li
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing401331, China
| | - Joseph S. Francisco
- Department of Earth and Environmental Sciences, University of Pennsylvania, Philadelphia, PA19104
- Department of Chemistry, University of Pennsylvania, Philadelphia, PA19104
| | - Hua Guo
- Department of Chemistry and Chemical Biology, Center for Computational Chemistry, University of New Mexico, Albuquerque, NM87131
| | - Lai-Sheng Wang
- Department of Chemistry, Brown University, Providence, RI02912
| |
Collapse
|
4
|
Neumark DM. Spectroscopy of Radicals, Clusters, and Transition States Using Slow Electron Velocity-Map Imaging of Cryogenically Cooled Anions. J Phys Chem A 2023; 127:4207-4223. [PMID: 37094039 DOI: 10.1021/acs.jpca.3c01537] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Slow electron velocity-map imaging of cryogenically cooled anions (cryo-SEVI) is a high-resolution variant of anion photoelectron spectroscopy that has been applied with considerable success over the years to the study of radicals, size-selected clusters, and transition states for unimolecular and bimolecular reactions. Cryo-SEVI retains the versatility of conventional anion photoelectron spectroscopy while offering sub-meV resolution, thereby enabling the resolution of vibrational structure in the photoelectron spectra of complex anions. This Feature Article describes recent experiments in our laboratory using cryo-SEVI, including a new research direction in which anions are vibrationally pre-excited with an infrared laser pulse prior to photodetachment.
Collapse
Affiliation(s)
- Daniel M Neumark
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| |
Collapse
|
5
|
Observation of resonances in the transition state region of the F + NH 3 reaction using anion photoelectron spectroscopy. Nat Chem 2023; 15:194-199. [PMID: 36509851 DOI: 10.1038/s41557-022-01100-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 10/24/2022] [Indexed: 12/14/2022]
Abstract
The transition state of a chemical reaction is a dividing surface on the reaction potential energy surface (PES) between reactants and products and is thus of fundamental interest in understanding chemical reactivity. The transient nature of the transition state presents challenges to its experimental characterization. Transition-state spectroscopy experiments based on negative-ion photodetachment can provide a direct probe of this region of the PES, revealing the detailed vibrational structure associated with the transition state. Here we study the F + NH3 → HF + NH2 reaction using slow photoelectron velocity-map imaging spectroscopy of cryogenically cooled FNH3- anions. Reduced-dimensionality quantum dynamical simulations performed on a global PES show excellent agreement with the experimental results, enabling the assignment of spectral structure. Our combined experimental-theoretical study reveals a manifold of vibrational Feshbach resonances in the product well of the F + NH3 PES. At higher energies, the spectra identify features attributed to resonances localized across the transition state and into the reactant complex that may impact the bimolecular reaction dynamics.
Collapse
|
6
|
Lu Y, Tang R, Zhang R, Ning C. Probing Isomerization Dynamics via a Dipole-Bound State. J Phys Chem Lett 2022; 13:8711-8716. [PMID: 36094393 DOI: 10.1021/acs.jpclett.2c02348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The observation of molecular isomerization dynamics is a long-standing goal in physical chemistry. The loosely bound electron in a dipole-bound state (DBS) can be a messenger for probing the isomerization of the neutral core. Here we study the isomerization dynamics of the salt dimer (NaCl)2 from linear to rhombic via a DBS using cryogenic photoelectron spectroscopy in combination with ab initio calculations. Although the energy level of the DBS is below the electron affinity of the linear (NaCl)2, (NaCl)2- in its DBS can autodetach due to the linear-to-rhombic isomerization. (NaCl)2- in the ground DBS has a relatively long lifetime of a few nanoseconds due to the quantum tunneling through a potential barrier during the transformation from linear to rhombic. In contrast, the vibrationally excited DBS has a much shorter lifetime on the order of picoseconds. The energy distribution of autodetachment electrons has an unexpected characteristic of the thermionic emission.
Collapse
Affiliation(s)
- Yuzhu Lu
- Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Tsinghua University, Beijing, 100084, China
| | - Rulin Tang
- Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Tsinghua University, Beijing, 100084, China
| | - Rui Zhang
- Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Tsinghua University, Beijing, 100084, China
| | - Chuangang Ning
- Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Tsinghua University, Beijing, 100084, China
| |
Collapse
|
7
|
Dahlmann F, Lochmann C, Marimuthu AN, Lara-Moreno M, Stoecklin T, Halvick P, Raoult M, Dulieu O, Wild R, Schlemmer S, Brünken S, Wester R. Strong ortho/para effects in the vibrational spectrum of Cl -(H 2). J Chem Phys 2021; 155:241101. [PMID: 34972371 DOI: 10.1063/5.0073749] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
The predissociation spectrum of the Cl-35(H2) complex is measured between 450 and 800 cm-1 in a multipole radiofrequency ion trap at different temperatures using the FELIX infrared free electron laser. Above a certain temperature, the removal of the Cl-(p-H2) para nuclear spin isomer by ligand exchange to the Cl-(o-H2) ortho isomer is suppressed effectively, thereby making it possible to detect the spectrum of this more weakly bound complex. At trap temperatures of 30.5 and 41.5 K, we detect two vibrational bands of Cl-(p-H2) at 510(1) and 606(1) cm-1. Using accurate quantum calculations, these bands are assigned to transitions to the inter-monomer vibrational modes (v1,v2 l2 ) = (0, 20) and (1, 20), respectively.
Collapse
Affiliation(s)
- Franziska Dahlmann
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria
| | - Christine Lochmann
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria
| | - Aravindh N Marimuthu
- FELIX Laboratory, Institute for Molecules and Materials, Radboud University, Toernooiveld 7, 6525 ED Nijmegen, The Netherlands
| | | | | | - Philippe Halvick
- Université de Bordeaux, ISM, CNSR UMR 5255, 33405 Talence, France
| | - Maurice Raoult
- Université Paris-Saclay, CNRS, Laboratoire Aimé Cotton, 91405 Orsay, France
| | - Olivier Dulieu
- Université Paris-Saclay, CNRS, Laboratoire Aimé Cotton, 91405 Orsay, France
| | - Robert Wild
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria
| | - Stephan Schlemmer
- I. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany
| | - Sandra Brünken
- FELIX Laboratory, Institute for Molecules and Materials, Radboud University, Toernooiveld 7, 6525 ED Nijmegen, The Netherlands
| | - Roland Wester
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria
| |
Collapse
|
8
|
On-the-Fly Ring-Polymer Molecular Dynamics Calculations of the Dissociative Photodetachment Process of the Oxalate Anion. Molecules 2021; 26:molecules26237250. [PMID: 34885831 PMCID: PMC8658898 DOI: 10.3390/molecules26237250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 11/22/2021] [Accepted: 11/26/2021] [Indexed: 11/16/2022] Open
Abstract
The dissociative photodetachment dynamics of the oxalate anion, C2O4H- + hν → CO2 + HOCO + e-, were theoretically studied using the on-the-fly path-integral and ring-polymer molecular dynamics methods, which can account for nuclear quantum effects at the density-functional theory level in order to compare with the recent experimental study using photoelectron-photofragment coincidence spectroscopy. To reduce computational time, the force acting on each bead of ring-polymer was approximately calculated from the first and second derivatives of the potential energy at the centroid position of the nuclei beads. We find that the calculated photoelectron spectrum qualitatively reproduces the experimental spectrum and that nuclear quantum effects are playing a role in determining spectral widths. The calculated coincidence spectrum is found to reasonably reproduce the experimental spectrum, indicating that a relatively large energy is partitioned into the relative kinetic energy between the CO2 and HOCO fragments. This is because photodetachment of the parent anion leads to Franck-Condon transition to the repulsive region of the neutral potential energy surface. We also find that the dissociation dynamics are slightly different between the two isomers of the C2O4H- anion with closed- and open-form structures.
Collapse
|
9
|
Tanteri S, Gordon SDS, Zou J, Osterwalder A. Study of He*/Ne*+Ar, Kr, N 2, H 2, D 2 Chemi-Ionization Reactions by Electron Velocity-Map Imaging. J Phys Chem A 2021; 125:10021-10034. [PMID: 34762426 DOI: 10.1021/acs.jpca.1c07232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The chemi-ionization of Ar, Kr, N2, H2, and D2 by Ne(3P2) and of Ar, Kr, and N2 by He(3S1) was studied by electron velocity map imaging (e-VMI) in a crossed molecular beam experiment. A curved magnetic hexapole was used to state-select the metastable species. Collision energies of 60 meV were obtained by individually controlling the beam velocities of both reactants. The chemi-ionization of atoms and molecules can proceed along different channels, among them Penning ionization and associative ionization. The evolution of the reaction is influenced by the internal redistribution of energy, which happens at the first reaction step that involves the emission of an electron. We designed and built an e-VMI spectrometer in order to investigate the electron kinetic energy distribution, which is related to the internal state distribution of the ionic reaction products. The analysis of the electron kinetic energy distributions allows an estimation of the ratio between the two-reaction channel Penning and associative ionization. In the molecular cases the vibrational or electronic excitation enhanced the conversion of internal energy into the translational energy of the forming ions, thus influencing the reaction outcome.
Collapse
Affiliation(s)
- Silvia Tanteri
- Institute for Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Sean D S Gordon
- Institute for Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Junwen Zou
- Institute for Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Andreas Osterwalder
- Institute for Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| |
Collapse
|
10
|
Song H, Zhu Y, Pan M, Yang M. Dissociative photodetachment of H 3O 2-: a full-dimensional quantum dynamics study. Phys Chem Chem Phys 2021; 23:22298-22304. [PMID: 34590660 DOI: 10.1039/d1cp03495b] [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
The transition state is a central concept of chemistry. Photoelectron-photofragment coincidence (PPC) spectroscopy has been proven as an attractive method to study the transition state dynamics. Within a state-of-the-art full-dimensional quantum mechanical model, the dissociative photodetachment dynamics of H3O2- is investigated on accurate anion and neutral potential energy surfaces. The calculated PPC spectrum of H3O2- agrees well with the experimental measurement. The dissociative product OH is exclusively populated on the ground vibrational state, implying the character of the spectator bond. In contrast, the product H2O is predominantly populated in the ground and fundamental states of the symmetric and antisymmetric stretching modes, which is caused by the strong coupling between the antisymmetric motion of the transferred H atom in the transient intermediate [H3O2]* and both stretching modes of the product H2O.
Collapse
Affiliation(s)
- Hongwei Song
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China.
| | - Yongfa Zhu
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China.
| | - Mengyi Pan
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China. .,College of Physical Science and Technology, Huazhong Normal University, Wuhan 430079, China
| | - Minghui Yang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China. .,Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430071, China
| |
Collapse
|
11
|
Wild R, Nötzold M, Lochmann C, Wester R. Complex Formation in Three-Body Reactions of Cl - with H 2. J Phys Chem A 2021; 125:8581-8586. [PMID: 34581582 PMCID: PMC9282673 DOI: 10.1021/acs.jpca.1c05458] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
![]()
Three-body reaction
rates of Cl– with H2 to form the weakly
bound complex Cl–(H2) are measured between
10 and 26 K in a linear radio-frequency wire
trap. Formation of larger clusters of the form Cl–(H2)2 are also observed. The three-body (or
termolecular) rate coefficients follow the form aT–1, with a = 1.12(2) × 10–29 cm6 K s–1. Reverse
reactions to repopulate the Cl– parent ion were
measured, even though the binding energy of the complex makes bimolecular
dissociative collisions energetically inaccessible at low temperatures.
The back-reaction was found to be proportional to the cube of the
hydrogen density, suggesting that the dissociation mechanism depends
on multiple collisions. Comparisons of the rate coefficients measured
in a 16-pole wire trap and a 22-pole trap demonstrate significantly
lower ion temperatures in the wire trap.
Collapse
Affiliation(s)
- Robert Wild
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria
| | - Markus Nötzold
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria
| | - Christine Lochmann
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria
| | - Roland Wester
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria
| |
Collapse
|
12
|
Talukder S, Seal D, Naskar P, Chaudhury P, Ghosh S. A two state model study of photo‐detachment dynamics driven by an optimally designed polychromatic field: A simulated annealing based optimisation. INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY 2021; 121. [DOI: 10.1002/qua.26676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 03/30/2021] [Indexed: 07/19/2023]
Affiliation(s)
- Srijeeta Talukder
- School of Chemical Sciences Indian Association for the Cultivation of Science Kolkata India
| | - Dipayan Seal
- Department of Chemistry University of Calcutta Kolkata India
| | - Pulak Naskar
- Department of Chemistry Mrinalini Datta Mahavidyapith Kolkata India
| | | | - Subhasree Ghosh
- Department of Chemistry Serampore College Serampore West Bengal India
| |
Collapse
|
13
|
Anstöter CS, Verlet JRR. Modeling the Photoelectron Angular Distributions of Molecular Anions: Roles of the Basis Set, Orbital Choice, and Geometry. J Phys Chem A 2021; 125:4888-4895. [PMID: 34042462 DOI: 10.1021/acs.jpca.1c03379] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A study investigating the effect of the basis set, orbital choice, and geometry on the modeling of photoelectron angular distributions (PADs) of molecular anions is presented. Experimental and modeled PADs for a number of molecular anions, including both closed- and open-shell systems, are considered. Guidelines are suggested for chemists who wish to design calculations to capture the correct chemical physics of the anisotropy of photodetachment, while balancing the computational cost associated with larger molecular anions.
Collapse
Affiliation(s)
- Cate S Anstöter
- Department of Chemistry, Durham University, Durham DH1 3LE, United Kingdom
| | - Jan R R Verlet
- Department of Chemistry, Durham University, Durham DH1 3LE, United Kingdom
| |
Collapse
|
14
|
Abstract
Hydrogen peroxide (H2O2) has recently received much attention as a safe and clean energy carrier for hydrogen molecules. In this study, based on direct ab initio molecular dynamics (AIMD) calculations, we demonstrated that H2O2 is directly formed via the photoelectron detachment of O-(H2O)n (n = 1-6) (water clusters of an oxygen radical anion). Three electronic states of oxygen atoms were examined in the calculations: O(X)(H2O)n (X = 3P, 1D, and 1S states). After the photoelectron detachment of O-(H2O)n (n = 1) to the 1S state, a complex comprising O(1S) and H2O, O(1S)-OH2, was formed. A hydrogen atom of H2O immediately transferred to O(1S) during an intracluster reaction to form H2O2 as the final product. Simulations were run to obtain a total of 33 trajectories for n = 1 that all led to the formation of H2O2. The average reaction time of H2O2 formation was calculated to be 57.7 fs in the case of n = 1, indicating that the reaction was completed within 100 fs of electron detachment. All the reaction systems O(1S)(H2O)n (n = 1-6) indicated the formation of H2O2 by the same mechanism. The reaction times for n = 2-6 were calculated to range between 80 and 180 fs, indicating that the reaction for n = 1 is faster than that of the larger clusters, that is, the larger the cluster size, the slower the reaction is. The reaction dynamics of the triplet O(3P) and singlet O(1D) potential energy surfaces were calculated for comparison. All calculations yielded the dissociation product O(X)(H2O)n → O(X) + (H2O)n (X = 3P and 1D), indicating that the O(1S) state contributes to the formation of H2O2. The reaction mechanism was discussed based on the theoretical results.
Collapse
Affiliation(s)
- Hiroto Tachikawa
- Division of Applied Chemistry, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan
| |
Collapse
|
15
|
Saito K, Sugiura Y, Miyazaki T, Takahashi Y, Takayanagi T. Quantum calculations of the photoelectron spectra of the OH -·NH 3 anion: implications for OH + NH 3→ H 2O + NH 2 reaction dynamics. Phys Chem Chem Phys 2021; 23:6950-6958. [PMID: 33729225 DOI: 10.1039/d0cp06514e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
We present the results of quantum dynamics calculations for analyzing the experimentally measured photoelectron spectra of the OH-·NH3 anion complex. Detachment of an excess electron of OH-·NH3 initially produces a molecular arrangement, which is close to the transition-state structure of the neutral OH + NH3→ H2O + NH2 hydrogen abstraction reaction due to the Franck-Condon principle, and thus finally leads to the OH + NH3 or H2O + NH2 asymptotic channel. We used both the path integral method and the reduced-dimensionality quantum wave packet method to simulate the photoelectron spectra of the OH-·NH3 anion. The calculated spectra were found to be in qualitative agreement with the experimental spectra. It was found that the photodetached complex mainly dissociates into the OH + NH3 channel; however, we found that the hydrogen exchange process also contributes to the photodetachment spectra.
Collapse
Affiliation(s)
- Kohei Saito
- Department of Chemistry, Saitama University, Shimo-Okubo 255, Sakura-ku, Saitama City, Saitama 338-8570, Japan.
| | | | | | | | | |
Collapse
|
16
|
Abstract
Electron capture by the σ* LUMO of isoxazole triggers the dissociation of the O-N bond and the opening of the ring. Photodetachment of the resulting anion accesses a neutral structure, in which the O· and ·N bond fragments interact through the intact remainder of the molecular ring and via a 3 Å gap created by the bond dissociation. These through-bond and through-space interactions result in a dense manifold of diradical states, including (in the order of increasing energy) a triplet, an open-shell singlet, a closed-shell singlet, and another triplet state. We report photoelectron spectra that reflect partially resolved signatures of these states. Remarkably, the structure of the isoxazole diradical manifold is qualitatively different from that of the analogous system in oxazole. The distinct properties of the two manifolds are explained by using a coupled-fragments molecular-orbital model. Consistent with the past conclusions [Culberson et al. Phys. Chem. Chem. Phys. 2014, 16, 3964-3972], the lingering through-space interactions between the O· and ·C bond fragments in ring-open oxazole are responsible for the relative stabilization of the closed-shell singlet state, which correlates with the ground-state cyclic structure. In contrast, the placement of the N atom in the terminal position within the ring-open structure of isoxazole is the key factor leading to the near degeneracy of the π and σ* orbitals, favoring a triplet-state configuration.
Collapse
Affiliation(s)
- Adam A Wallace
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, Arizona 85721, United States
| | - Yerbolat Dauletyarov
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, Arizona 85721, United States
| | - Andrei Sanov
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, Arizona 85721, United States
| |
Collapse
|
17
|
Corkish TR, Haakansson CT, Watson PD, McKinley AJ, Wild DA. Photoelectron Spectroscopy and Structures of X - ⋅⋅⋅CH 2 O (X=F, Cl, Br, I) Complexes. Chemphyschem 2021; 22:69-75. [PMID: 33184977 DOI: 10.1002/cphc.202000852] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 11/12/2020] [Indexed: 11/11/2022]
Abstract
A combined experimental and theoretical approach has been used to investigate X- ⋅⋅⋅CH2 O (X=F, Cl, Br, I) complexes in the gas phase. Photoelectron spectroscopy, in tandem with time-of-flight mass spectrometry, has been used to determine electron binding energies for the Cl- ⋅⋅⋅CH2 O, Br- ⋅⋅⋅CH2 O, and I- ⋅⋅⋅CH2 O species. Additionally, high-level CCSD(T) calculations found a C2v minimum for these three anion complexes, with predicted electron detachment energies in excellent agreement with the experimental photoelectron spectra. F- ⋅⋅⋅CH2 O was also studied theoretically, with a Cs hydrogen-bonded complex found to be the global minimum. Calculations extended to neutral X⋅⋅⋅CH2 O complexes, with the results of potential interest to atmospheric CH2 O chemistry.
Collapse
Affiliation(s)
- Timothy R Corkish
- School of Molecular Sciences, The University of Western Australia, Crawley, Western Australia, 6009, Australia
| | - Christian T Haakansson
- School of Molecular Sciences, The University of Western Australia, Crawley, Western Australia, 6009, Australia
| | - Peter D Watson
- School of Molecular Sciences, The University of Western Australia, Crawley, Western Australia, 6009, Australia
| | - Allan J McKinley
- School of Molecular Sciences, The University of Western Australia, Crawley, Western Australia, 6009, Australia
| | - Duncan A Wild
- School of Molecular Sciences, The University of Western Australia, Crawley, Western Australia, 6009, Australia
| |
Collapse
|
18
|
Miyazaki T, Watabe Y, Hashimoto Y, Takahashi Y, Sugiura Y, Saito K, Takayanagi T. Theoretical Analysis of the Formylmethylene Anion Photoelectron Spectrum: Importance of Wolff Rearrangement Dynamics. J Phys Chem A 2020; 124:9721-9728. [DOI: 10.1021/acs.jpca.0c09067] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Takaaki Miyazaki
- Department of Chemistry, Saitama University, Shimo-Okubo 255, Saitama City, Saitama 338-8570, Japan
| | - Yuya Watabe
- Department of Chemistry, Saitama University, Shimo-Okubo 255, Saitama City, Saitama 338-8570, Japan
| | - Yu Hashimoto
- Department of Chemistry, Saitama University, Shimo-Okubo 255, Saitama City, Saitama 338-8570, Japan
| | - Yukinobu Takahashi
- Department of Chemistry, Saitama University, Shimo-Okubo 255, Saitama City, Saitama 338-8570, Japan
| | - Yutaro Sugiura
- Department of Chemistry, Saitama University, Shimo-Okubo 255, Saitama City, Saitama 338-8570, Japan
| | - Kohei Saito
- Department of Chemistry, Saitama University, Shimo-Okubo 255, Saitama City, Saitama 338-8570, Japan
| | - Toshiyuki Takayanagi
- Department of Chemistry, Saitama University, Shimo-Okubo 255, Saitama City, Saitama 338-8570, Japan
| |
Collapse
|
19
|
Simpson M, Nötzold M, Schmidt-May A, Michaelsen T, Bastian B, Meyer J, Wild R, Gianturco FA, Milovanović M, Kokoouline V, Wester R. Threshold photodetachment spectroscopy of the astrochemical anion CN . J Chem Phys 2020; 153:184309. [PMID: 33187436 DOI: 10.1063/5.0029841] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Threshold photodetachment spectroscopy has been performed on the molecular anion CN- at both 16(1) K and 295(2) K in a 22-pole ion trap and at 295(2) K from a pulsed ion beam. The spectra show a typical energy dependence of the detachment cross section yielding a determination of the electron affinity of CN to greater precision than has previously been known at 31 163(16) cm-1 [3.864(2) eV]. Allowed s-wave detachment is observed for CN-, but the dependence of the photodetachment cross section near the threshold is perturbed by the long-range interaction between the permanent dipole moment of CN and the outgoing electron. Furthermore, we observe a temperature dependence of the cross section near the threshold, which we attribute to a reduction of the effective permanent dipole due to higher rotational excitation at higher temperatures.
Collapse
Affiliation(s)
- Malcolm Simpson
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria
| | - Markus Nötzold
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria
| | - Alice Schmidt-May
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria
| | - Tim Michaelsen
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria
| | - Björn Bastian
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria
| | - Jennifer Meyer
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria
| | - Robert Wild
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria
| | - Franco A Gianturco
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria
| | - Milan Milovanović
- University of Belgrade, Faculty of Physical Chemistry, Studentski trg 12-16, P.O. Box 47, 11158 Belgrade, Serbia
| | - Viatcheslav Kokoouline
- Department of Physics, University of Central Florida, 4111 Libra Drive, Physical Sciences Bldg. 430, Orlando, Florida 32816-2385, USA
| | - Roland Wester
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria
| |
Collapse
|
20
|
Sugiura Y, Takayanagi T. Franck–Condon simulations of transition-state spectra for the OH + H2O and OD + D2O reactions. Phys Chem Chem Phys 2020; 22:20685-20692. [DOI: 10.1039/d0cp03681a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Quantum wave packet calculations in reduced dimensions were performed to analyze the experimentally measured transition-state spectra of the OH + H2O and OD + D2O hydrogen exchange reactions.
Collapse
Affiliation(s)
- Yutaro Sugiura
- Department of Chemistry
- Saitama University
- Saitama City
- Japan
| | | |
Collapse
|
21
|
Takayanagi T. Quantum dynamics analysis of transition-state spectrum for the SH + H 2S → H 2S + SH reaction. Phys Chem Chem Phys 2020; 22:19845-19854. [DOI: 10.1039/d0cp03072d] [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
Quantum dynamics calculations were performed to understand transition-state spectroscopy of the SH + H2S hydrogen atom transfer reaction.
Collapse
|
22
|
Watabe Y, Miyazaki T, Takayanagi T, Suzuki YI. Theoretical Study on the Spectroscopic Observation of Intersystem Crossing between 3B 1 and 1A 1 States of GeH 2 Using the GeH 2– ( 2B 1) Anion. J Phys Chem A 2019; 123:5734-5740. [DOI: 10.1021/acs.jpca.9b04548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yuya Watabe
- Department of Chemistry, Saitama University, Shimo-Okubo 255, Sakura-ku, Saitama City, Saitama 338-8570, Japan
| | - Takaaki Miyazaki
- Department of Chemistry, Saitama University, Shimo-Okubo 255, Sakura-ku, Saitama City, Saitama 338-8570, Japan
| | - Toshiyuki Takayanagi
- Department of Chemistry, Saitama University, Shimo-Okubo 255, Sakura-ku, Saitama City, Saitama 338-8570, Japan
| | - Yoshi-ichi Suzuki
- School of Pharmaceutical Sciences, Health Sciences University of Hokkaido, 1757 Kanazawa, Tobetsucho, Ishikari, Hokkaido 061-0293, Japan
| |
Collapse
|
23
|
Yang T, Huang L, Xiao C, Chen J, Wang T, Dai D, Lique F, Alexander MH, Sun Z, Zhang DH, Yang X, Neumark DM. Enhanced reactivity of fluorine with para-hydrogen in cold interstellar clouds by resonance-induced quantum tunnelling. Nat Chem 2019; 11:744-749. [DOI: 10.1038/s41557-019-0280-3] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Accepted: 05/07/2019] [Indexed: 11/09/2022]
|
24
|
Guo L, Li J, Ma J, Guo H. Quantum dynamical investigation of product state distributions of the F + CH3OH → HF + CH3O reaction via photodetachment of the F−(HOCH3) anion. J Chem Phys 2019; 150:044301. [DOI: 10.1063/1.5082274] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Lifen Guo
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, Sichuan 610065, China
| | - Jun Li
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
| | - Jianyi Ma
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, Sichuan 610065, China
| | - Hua Guo
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, USA
| |
Collapse
|
25
|
Shahi A, McCaslin L, Albeck Y, Continetti RE, Gerber RB, Strasser D. Double Photodetachment of F -·H 2O: Experimental and Theoretical Studies of [F·H 2O] . J Phys Chem Lett 2018; 9:6808-6813. [PMID: 30433784 DOI: 10.1021/acs.jpclett.8b02562] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Double photodetachment of the cluster F-·H2O in a strong laser field is explored in a combined experimental-theoretical study. Products are observed experimentally by coincidence photofragment imaging following double ionization by intense laser pulses. Theoretically, equation of motion coupled cluster calculations (EOM-CC), suitable for modeling strong correlation effects in the electronic wave function, shed light on the Franck-Condon region, and ab initio molecular dynamics simulations also performed using EOM-CC methods reveal the fragmentation dynamics in time on the lowest-lying singlet and triplet states of [F·H2O]+. The simulations show the formation of H2O+ + F, which is the predominant experimentally observed product channel. Suggestions are proposed for the formation mechanisms of the minor products, for example, the very interesting H2F+, which involves significant geometrical rearrangement. Analysis of the results suggests interesting future directions for the exploration of photodetachment of anionic clusters in an intense laser field.
Collapse
Affiliation(s)
- Abhishek Shahi
- Institute of Chemistry , The Hebrew University of Jerusalem , Jerusalem 91904 , Israel
| | - Laura McCaslin
- Fritz Haber Center for Molecular Dynamics, Institute of Chemistry , The Hebrew University of Jerusalem , Jerusalem 91904 , Israel
| | - Yishai Albeck
- Institute of Chemistry , The Hebrew University of Jerusalem , Jerusalem 91904 , Israel
| | - Robert E Continetti
- Department of Chemistry and Biochemistry , University of California San Diego , La Jolla , California 92093-0340 , United States
| | - R Benny Gerber
- Fritz Haber Center for Molecular Dynamics, Institute of Chemistry , The Hebrew University of Jerusalem , Jerusalem 91904 , Israel
- Department of Chemistry , University of California , Irvine , California 92697 , United States
| | - Daniel Strasser
- Institute of Chemistry , The Hebrew University of Jerusalem , Jerusalem 91904 , Israel
| |
Collapse
|
26
|
Zhao H, Xie D, Guo H. Quantum dynamics of ClH 2O - photodetachment: Isotope effect and impact of anion vibrational excitation. J Chem Phys 2018; 148:064305. [PMID: 29448793 DOI: 10.1063/1.5020270] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Photodetachment of the ClH2O- anion is investigated using full-dimensional quantum mechanics on accurate potential energy surfaces of both the anion and neutral species. Detailed analysis of the photoelectron spectrum and the corresponding wavefunctions reveals that the photodetachment leads to, in the product channel of the exothermic HCl + OH → Cl + H2O reaction, the formation of numerous Feshbach resonances due apparently to slow energy transfer from H2O vibrational modes to the dissociation coordinate. These long-lived resonances can be grouped into two broad peaks in the low-resolution photoelectron spectrum, which is in good agreement with available experiments, and they are assigned to the ground and first excited OH stretching vibrational manifolds of H2O complexed with Cl. In addition, effects of isotope substitution on the photoelectron spectrum were small. Finally, photodetachment of the vibrationally excited ClH2O- in the ionic hydrogen bond mode is found to lead to Feshbach resonances with higher stretching vibrational excitations in H2O.
Collapse
Affiliation(s)
- Hailin Zhao
- Institute of Theoretical and Computational Chemistry, Key Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Daiqian Xie
- Institute of Theoretical and Computational Chemistry, Key Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Hua Guo
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, USA
| |
Collapse
|
27
|
Abstract
Slow photoelectron velocity-map imaging spectroscopy of cryogenically cooled anions (cryo-SEVI) is a powerful technique for elucidating the vibrational and electronic structure of neutral radicals, clusters, and reaction transition states. SEVI is a high-resolution variant of anion photoelectron spectroscopy based on photoelectron imaging that yields spectra with energy resolution as high as 1-2 cm-1. The preparation of cryogenically cold anions largely eliminates hot bands and dramatically narrows the rotational envelopes of spectral features, enabling the acquisition of well-resolved photoelectron spectra for complex and spectroscopically challenging species. We review the basis and history of the SEVI method, including recent experimental developments that have improved its resolution and versatility. We then survey recent SEVI studies to demonstrate the utility of this technique in the spectroscopy of aromatic radicals, metal and metal oxide clusters, nonadiabatic interactions between excited states of small molecules, and transition states of benchmark bimolecular reactions.
Collapse
Affiliation(s)
- Marissa L Weichman
- Department of Chemistry, University of California, Berkeley, California 94720, USA; , .,Current affiliation: JILA, National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - Daniel M Neumark
- Department of Chemistry, University of California, Berkeley, California 94720, USA; , .,Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| |
Collapse
|
28
|
Wang T, Yang T, Xiao C, Sun Z, Zhang D, Yang X, Weichman ML, Neumark DM. Dynamical resonances in chemical reactions. Chem Soc Rev 2018; 47:6744-6763. [DOI: 10.1039/c8cs00041g] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The transition state is a key concept in the field of chemistry and is important in the study of chemical kinetics and reaction dynamics.
Collapse
Affiliation(s)
- Tao Wang
- State Key Laboratory of Molecular Reaction Dynamics
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian
- China
| | - Tiangang Yang
- State Key Laboratory of Molecular Reaction Dynamics
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian
- China
| | - Chunlei Xiao
- State Key Laboratory of Molecular Reaction Dynamics
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian
- China
| | - Zhigang Sun
- State Key Laboratory of Molecular Reaction Dynamics
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian
- China
| | - Donghui Zhang
- State Key Laboratory of Molecular Reaction Dynamics
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian
- China
| | - Xueming Yang
- State Key Laboratory of Molecular Reaction Dynamics
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian
- China
| | | | - Daniel M. Neumark
- Department of Chemistry
- University of California at Berkeley
- Berkeley
- USA
- Chemical Sciences Division
| |
Collapse
|
29
|
Yu AY. Partial Potential Energy Surfaces and Their Application to Reaction Resonances. PROGRESS IN REACTION KINETICS AND MECHANISM 2017. [DOI: 10.3184/146867817x14954764850333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Feshbach resonances are not restricted to small reactive systems such as F + H2 and I + HI but can be found in many reactive systems. In this paper, the concept of the partial potential energy surface (PPES) is introduced. It is shown that the dynamic “Lake Eyring” explains very well the existence of reactive resonances in elementary chemical reactions. In particular, the PPESs of the Cl + CH3CH2Br and Cl + CH3CH2CH2Br systems, including the minimum energy path and the vibrational potential energy curves, were constructed using quantum chemistry methods. Based on the constructed PPESs, the scattering resonance states of these reactions could be examined and the resonance state lifetimes were estimated.
Collapse
Affiliation(s)
- Ang-Yang Yu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P.R. China
| |
Collapse
|
30
|
Ray AW, Ma J, Otto R, Li J, Guo H, Continetti RE. Effects of vibrational excitation on the F + H 2O → HF + OH reaction: dissociative photodetachment of overtone-excited [F-H-OH] . Chem Sci 2017; 8:7821-7833. [PMID: 29163919 PMCID: PMC5674243 DOI: 10.1039/c7sc03364h] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 09/23/2017] [Indexed: 11/21/2022] Open
Abstract
Photodetaching vibrationally excited FH2O– channels energy into the reaction coordinate of the F + H2O reaction, as shown in this joint experimental-theoretical study.
The reaction F + H2O → HF + OH is a four-atom system that provides an important benchmark for reaction dynamics. Hydrogen atom transfer at the transition state for this reaction is expected to exhibit a strong dependence on reactant vibrational excitation. In the present study, the vibrational effects are examined by photodetachment of vibrationally excited F–(H2O) precursor anions using photoelectron-photofragment coincidence (PPC) spectroscopy and compared with full six-dimensional quantum dynamical calculations on ab initio potential energy surfaces. Prior to photodetachment at hνUV = 4.80 eV, the overtone of the ionic hydrogen bond mode in the precursor F–(H2O), 2νIHB at 2885 cm–1, was excited using a tunable IR laser. Experiment and theory show that vibrational energy in the anion can be effectively carried away by the photoelectron upon a Franck–Condon photodetachment, and also show evidence for an increase of branching into the F + H2O reactant channel. The experimental results suggest a greater role for product rotational excitation than theory. Improved potential energy surfaces and longer wavepacket propagation times would be helpful to further examine the nature of the discrepancy.
Collapse
Affiliation(s)
- Amelia W Ray
- Department of Chemistry and Biochemistry , University of California, San Diego , 9500 Gilman Drive , La Jolla , California 92093-0340 , USA .
| | - Jianyi Ma
- Institute of Atomic and Molecular Physics , Sichuan University , Chengdu , Sichuan 610065 , China .
| | - Rico Otto
- Department of Chemistry and Biochemistry , University of California, San Diego , 9500 Gilman Drive , La Jolla , California 92093-0340 , USA .
| | - Jun Li
- School of Chemistry and Chemical Engineering , Chongqing University , Chongqing 401331 , China
| | - Hua Guo
- Department of Chemistry and Chemical Biology , University of New Mexico , Albuquerque , New Mexico 87131 , USA
| | - Robert E Continetti
- Department of Chemistry and Biochemistry , University of California, San Diego , 9500 Gilman Drive , La Jolla , California 92093-0340 , USA .
| |
Collapse
|
31
|
Hou GL, Wang XB, McCoy AB, Borden WT. Experimental and Theoretical Studies of the F• + H–F Transition-State Region by Photodetachment of [F–H–F]−. J Phys Chem A 2017; 121:7895-7902. [DOI: 10.1021/acs.jpca.7b07682] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gao-Lei Hou
- Physical
Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, MS K8-88, Richland, Washington 99352, United States
| | - Xue-Bin Wang
- Physical
Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, MS K8-88, Richland, Washington 99352, United States
| | - Anne B. McCoy
- Department
of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Weston Thatcher Borden
- Department
of Chemistry and the Center for Advanced Scientific Computing and
Modeling, University of North Texas, 1155 Union Circle, #305070, Denton, Texas 76203-5017, United States
| |
Collapse
|
32
|
Weichman ML, DeVine JA, Babin MC, Li J, Guo L, Ma J, Guo H, Neumark DM. Feshbach resonances in the exit channel of the F + CH3OH → HF + CH3O reaction observed using transition-state spectroscopy. Nat Chem 2017; 9:950-955. [DOI: 10.1038/nchem.2804] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 05/19/2017] [Indexed: 11/09/2022]
|
33
|
Tokizaki C, Yoshida T, Takayanagi T. Theoretical analyses of the time-resolved nuclear dynamics of the transition state for the 1,3,5,7-cyclooctatetraene unimolecular reaction. COMPUT THEOR CHEM 2017. [DOI: 10.1016/j.comptc.2017.04.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
34
|
Krylov AI. The Quantum Chemistry of Open-Shell Species. REVIEWS IN COMPUTATIONAL CHEMISTRY 2017. [DOI: 10.1002/9781119356059.ch4] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Anna I. Krylov
- Department of Chemistry; University of Southern California; Los Angeles CA United States
| |
Collapse
|
35
|
Ren Z, Sun Z, Zhang D, Yang X. A review of dynamical resonances in A + BC chemical reactions. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2017; 80:026401. [PMID: 28008875 DOI: 10.1088/1361-6633/80/2/026401] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The concept of the transition state has played an important role in the field of chemical kinetics and reaction dynamics. Reactive resonances in the transition-state region can dramatically enhance the reaction probability; thus investigation of the reactive resonances has attracted great attention from chemical physicists for many decades. In this review, we mainly focus on the recent progress made in probing the elusive resonance phenomenon in the simple A + BC reaction and understanding its nature, especially in the benchmark F/Cl + H2 and their isotopic variants. The signatures of reactive resonances in the integral cross section, differential cross section (DCS), forward- and backward-scattered DCS, and anion photodetachment spectroscopy are comprehensively presented in individual prototype reactions. The dynamical origins of reactive resonances are also discussed in this review, based on information on the wave function in the transition-state region obtained by time-dependent quantum wave-packet calculations.
Collapse
Affiliation(s)
- Zefeng Ren
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, Liaoning, People's Republic of China. International Center for Quantum Materials (ICQM) and School of Physics, Peking University, Beijing 100871, People's Republic of China. Collaborative Innovation Center of Quantum Matter, Beijing 100871, People's Republic of China
| | | | | | | |
Collapse
|
36
|
Takayanagi T. Nonadiabatic quantum dynamics calculations of transition state spectroscopy of I + HI and I + DI reactions: the existence of long life vibrational bonding resonances. Phys Chem Chem Phys 2017; 19:29125-29133. [DOI: 10.1039/c7cp05478e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nonadiabatic quantum dynamics calculations were performed to understand the transition state spectroscopy of I + HI and I + DI reactions.
Collapse
Affiliation(s)
- Toshiyuki Takayanagi
- Department of Chemistry, Saitama University, 255 Shimo-Okubo, Sakura-ku, Saitama City
- Saitama 338-8570
- Japan
| |
Collapse
|
37
|
Negative Ion Photoelectron Spectroscopy and Its Use in Investigating the Transition States for Some Organic Reactions. ADVANCES IN PHYSICAL ORGANIC CHEMISTRY 2017. [DOI: 10.1016/bs.apoc.2017.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
38
|
Abstract
Recent experimental and theoretical advances in transient reaction dynamics probed by photodetachment of polyatomic anions are reviewed.
Collapse
Affiliation(s)
- Robert E. Continetti
- Department of Chemistry and Biochemistry
- University of California San Diego
- La Jolla
- USA
| | - Hua Guo
- Department of Chemistry and Chemical Biology
- University of New Mexico
- Albuquerque
- USA
| |
Collapse
|
39
|
Gunina AO, Krylov AI. Probing Electronic Wave Functions of Sodium-Doped Clusters: Dyson Orbitals, Anisotropy Parameters, and Ionization Cross-Sections. J Phys Chem A 2016; 120:9841-9856. [DOI: 10.1021/acs.jpca.6b10098] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anastasia O. Gunina
- Department of Chemistry, University of Southern California, Los Angeles, California 90089-0482, United States
| | - Anna I. Krylov
- Department of Chemistry, University of Southern California, Los Angeles, California 90089-0482, United States
| |
Collapse
|
40
|
Balakrishnan N. Perspective: Ultracold molecules and the dawn of cold controlled chemistry. J Chem Phys 2016; 145:150901. [DOI: 10.1063/1.4964096] [Citation(s) in RCA: 157] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- N. Balakrishnan
- Department of Chemistry, University of Nevada, Las Vegas, Nevada 89154, USA
| |
Collapse
|
41
|
Chen B, Hrovat DA, Borden WT. Calculations of the energies of the low-lying electronic states of dioxatrimethylenemethane (H2CCO2) and prediction of the negative ion photoelectron (NIPE) spectrum of its radical anion. J PHYS ORG CHEM 2016. [DOI: 10.1002/poc.3594] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Bo Chen
- Department of Chemistry and the Center for Advanced Scientific Computing and Modeling; University of North Texas; 1155 Union Circle, #305070 Denton TX USA
| | - David A. Hrovat
- Department of Chemistry and the Center for Advanced Scientific Computing and Modeling; University of North Texas; 1155 Union Circle, #305070 Denton TX USA
| | - Weston Thatcher Borden
- Department of Chemistry and the Center for Advanced Scientific Computing and Modeling; University of North Texas; 1155 Union Circle, #305070 Denton TX USA
| |
Collapse
|
42
|
Dixon AR, Xue T, Sanov A. HOCCO versus OCCO: Comparative spectroscopy of the radical and diradical reactive intermediates. J Chem Phys 2016; 144:234305. [PMID: 27334160 DOI: 10.1063/1.4953774] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present a photoelectron imaging study of three glyoxal derivatives: the ethylenedione anion (OCCO(-)), ethynediolide (HOCCO(-)), and glyoxalide (OHCCO(-)). These anions provide access to the corresponding neutral reactive intermediates: the OCCO diradical and the HOCCO and OHCCO radicals. Contrasting the straightforward deprotonation pathway in the reaction of O(-) with glyoxal (OHCCHO), which is expected to yield glyoxalide (OHCCO(-)), OHCCO(-) is shown to be a minor product, with HOCCO(-) being the dominant observed isomer of the m/z = 57 anion. In the HOCCO/OHCCO anion photoelectron spectrum, we identify several electronic states of this radical system and determine the adiabatic electron affinity of HOCCO as 1.763(6) eV. This result is compared to the corresponding 1.936(8) eV value for ethylenedione (OCCO), reported in our recent study of this transient diradical [A. R. Dixon, T. Xue, and A. Sanov, Angew. Chem., Int. Ed. 54, 8764-8767 (2015)]. Based on the comparison of the HOCCO(-)/OHCCO(-) and OCCO(-) photoelectron spectra, we discuss the contrasting effects of the hydrogen connected to the carbon framework or the terminal oxygen in OCCO.
Collapse
Affiliation(s)
- Andrew R Dixon
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, Arizona 85721, USA
| | - Tian Xue
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, Arizona 85721, USA
| | - Andrei Sanov
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, Arizona 85721, USA
| |
Collapse
|
43
|
Blouin S, Gandon V, Blond G, Suffert J. Synthesis of Cyclooctatetraenes through a Palladium-Catalyzed Cascade Reaction. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201602586] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Sarah Blouin
- Université de Strasbourg; Faculté de Pharmacie, UMR 7200 CNRS/UDS; 74 Route du Rhin 67401 Illkirch-Graffenstaden France
| | - Vincent Gandon
- ICMMO, CNRS UMR 8182, Univ. Paris-Sud; Université Paris-Saclay; bâtiment 420 91405 Orsay cedex France
- ICSN, CNRS UPR 2301, Univ. Paris-Sud; Université Paris-Saclay; 91198 Gif-sur-Yvette France
| | - Gaëlle Blond
- Université de Strasbourg; Faculté de Pharmacie, UMR 7200 CNRS/UDS; 74 Route du Rhin 67401 Illkirch-Graffenstaden France
| | - Jean Suffert
- Université de Strasbourg; Faculté de Pharmacie, UMR 7200 CNRS/UDS; 74 Route du Rhin 67401 Illkirch-Graffenstaden France
| |
Collapse
|
44
|
Blouin S, Gandon V, Blond G, Suffert J. Synthesis of Cyclooctatetraenes through a Palladium-Catalyzed Cascade Reaction. Angew Chem Int Ed Engl 2016; 55:7208-11. [PMID: 27135905 DOI: 10.1002/anie.201602586] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Indexed: 11/12/2022]
Affiliation(s)
- Sarah Blouin
- Université de Strasbourg; Faculté de Pharmacie, UMR 7200 CNRS/UDS; 74 Route du Rhin 67401 Illkirch-Graffenstaden France
| | - Vincent Gandon
- ICMMO, CNRS UMR 8182, Univ. Paris-Sud; Université Paris-Saclay; bâtiment 420 91405 Orsay cedex France
- ICSN, CNRS UPR 2301, Univ. Paris-Sud; Université Paris-Saclay; 91198 Gif-sur-Yvette France
| | - Gaëlle Blond
- Université de Strasbourg; Faculté de Pharmacie, UMR 7200 CNRS/UDS; 74 Route du Rhin 67401 Illkirch-Graffenstaden France
| | - Jean Suffert
- Université de Strasbourg; Faculté de Pharmacie, UMR 7200 CNRS/UDS; 74 Route du Rhin 67401 Illkirch-Graffenstaden France
| |
Collapse
|
45
|
Tokizaki C, Yoshida T, Takayanagi T. Quantum transition state dynamics of the cyclooctatetraene unimolecular reaction on ab initio potential energy surfaces. Chem Phys 2016. [DOI: 10.1016/j.chemphys.2016.02.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
46
|
Gozem S, Gunina AO, Ichino T, Osborn DL, Stanton JF, Krylov AI. Photoelectron wave function in photoionization: plane wave or Coulomb wave? J Phys Chem Lett 2015; 6:4532-4540. [PMID: 26509428 DOI: 10.1021/acs.jpclett.5b01891] [Citation(s) in RCA: 96] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The calculation of absolute total cross sections requires accurate wave functions of the photoelectron and of the initial and final states of the system. The essential information contained in the latter two can be condensed into a Dyson orbital. We employ correlated Dyson orbitals and test approximate treatments of the photoelectron wave function, that is, plane and Coulomb waves, by comparing computed and experimental photoionization and photodetachment spectra. We find that in anions, a plane wave treatment of the photoelectron provides a good description of photodetachment spectra. For photoionization of neutral atoms or molecules with one heavy atom, the photoelectron wave function must be treated as a Coulomb wave to account for the interaction of the photoelectron with the +1 charge of the ionized core. For larger molecules, the best agreement with experiment is often achieved by using a Coulomb wave with a partial (effective) charge smaller than unity. This likely derives from the fact that the effective charge at the centroid of the Dyson orbital, which serves as the origin of the spherical wave expansion, is smaller than the total charge of a polyatomic cation. The results suggest that accurate molecular photoionization cross sections can be computed with a modified central potential model that accounts for the nonspherical charge distribution of the core by adjusting the charge in the center of the expansion.
Collapse
Affiliation(s)
- Samer Gozem
- Department of Chemistry, University of Southern California , Los Angeles, California 90089-0482, United States
| | - Anastasia O Gunina
- Department of Chemistry, University of Southern California , Los Angeles, California 90089-0482, United States
| | - Takatoshi Ichino
- Institute for Theoretical Chemistry, Department of Chemistry, The University of Texas at Austin , Austin, Texas 78712, United States
| | - David L Osborn
- Combustion Research Facility, Sandia National Laboratories , Livermore, California 94551, United States
| | - John F Stanton
- Institute for Theoretical Chemistry, Department of Chemistry, The University of Texas at Austin , Austin, Texas 78712, United States
| | - Anna I Krylov
- Department of Chemistry, University of Southern California , Los Angeles, California 90089-0482, United States
| |
Collapse
|
47
|
Theoretical analysis of the transition-state spectrum of the cyclooctatetraene unimolecular reaction: Three degree-of-freedom model calculations. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2015.06.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
48
|
Yoshida T, Sato K, Takayanagi T. First-principles simulations of transition state spectra of the I + HI and I + DI reactions and vibrational bonding in IMuI. Chem Phys 2015. [DOI: 10.1016/j.chemphys.2015.05.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
49
|
Kim JB, Weichman ML, Sjolander TF, Neumark DM, Kłos J, Alexander MH, Manolopoulos DE. Spectroscopic observation of resonances in the F + H
2
reaction. Science 2015; 349:510-3. [DOI: 10.1126/science.aac6939] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Jongjin B. Kim
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | | | | | - Daniel M. Neumark
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Jacek Kłos
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742, USA
| | - Millard H. Alexander
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742, USA
- Institute for Physical Science and Technology, University of Maryland, College Park, MD 20742, USA
| | - David E. Manolopoulos
- Department of Chemistry, Oxford University, Physical and Theoretical Chemistry Laboratory, South Parks Road, Oxford OX1 3QZ, UK
| |
Collapse
|
50
|
Borden WT. The Unpredictability of Research Directions and the Synergy between Theory and Experiment in Physical-Organic Chemistry. Isr J Chem 2015. [DOI: 10.1002/ijch.201400170] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|