Multi-mass velocity-map imaging studies of photoinduced and electron-induced chemistry

Claire Vallance

Chem. Commun., 2019, 55, 6336
DOI: 10.1039/C9CC02426C

Isomer-specific photofragmentation of C3H3+ at the carbon K-edge

Simon Reinwardt, Patrick Cieslik, Ticia Buhr, Alexander Perry-Sassmannshausen, Stefan Schippers, Alfred Müller, Florian Trinter and Michael Martins

Phys. Chem. Chem. Phys., 2024, 26, 15519
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Dynamics of carbene formation in the reaction of methane with the tantalum cation in the gas phase

Marcel Meta, Maximilian E. Huber, Maurice Birk, Martin Wedele, Milan Ončák and Jennifer Meyer

Faraday Discuss., 2024, 251, 587
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Ta+ and Nb+ + CO2: intersystem crossing in ion–molecule reactions

Maximilian E. Huber, Tucker W. R. Lewis, Marcel Meta, Shaun G. Ard, Yang Liu, Brendan C. Sweeny, Hua Guo, Milan Ončák, Nicholas S. Shuman and Jennifer Meyer

Phys. Chem. Chem. Phys., 2024, 26, 8670
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The influence of fluorination on the dynamics of the F− + CH3CH2I reaction

Thomas Gstir, Tim Michaelsen, Bryan A. Long, András B. Nacsa, Atilay Ayasli, Dasarath Swaraj, Fabio Zappa, Florian Trummer, Shaun G. Ard, Nicholas S. Shuman, Gábor Czakó, Albert A. Viggiano and Roland Wester

Phys. Chem. Chem. Phys., 2023, 25, 18711
DOI: 10.1039/D3CP02110F

CO2 activation by gaseous zirconium cations: competition between spin-changing and spin-conserving pathways

Marcel Meta, Yang Liu, Martin Wedele, Shaun G. Ard, Tucker W. R. Lewis, Milan Ončák, Nicholas S. Shuman, Albert A. Viggiano, Hua Guo and Jennifer Meyer

Chem. Sci., 2025, 16, 16090
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Imaging the dynamics of ion–molecule reactions

Eduardo Carrascosa, Jennifer Meyer and Roland Wester

Chem. Soc. Rev., 2017, 46, 7498
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Direct chemical dynamics simulations of the CH3O− + CH3I reaction: substitution vs. proton transfer

Anitta Regina, Akash Gutal and Manikandan Paranjothy

Phys. Chem. Chem. Phys., 2026, 28, 7879
DOI: 10.1039/D5CP04808G

Reactions of metal cluster anions with inorganic and organic molecules in the gas phase

Yan-Xia Zhao, Qing-Yu Liu, Mei-Qi Zhang and Sheng-Gui He

Dalton Trans., 2016, 45, 11471
DOI: 10.1039/C6DT01246A

Reaction dynamics of the methoxy anion CH3O− with methyl iodide CH3I

Thomas Gstir, David Sundelin, Tim Michaelsen, Atilay Ayasli, Dasarath Swaraj, Jerin Judy, Fabio Zappa, Wolf Geppert and Roland Wester

Faraday Discuss., 2024, 251, 573
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Proton transfer dynamics modified by CH-stretching excitation

Tim Michaelsen, Björn Bastian, Patrick Strübin, Jennifer Meyer and Roland Wester

Phys. Chem. Chem. Phys., 2020, 22, 12382
DOI: 10.1039/D0CP00727G

Conservation of direct dynamics in sterically hindered SN2/E2 reactions

Eduardo Carrascosa, Jennifer Meyer, Tim Michaelsen, Martin Stei and Roland Wester

Chem. Sci., 2018, 9, 693
DOI: 10.1039/C7SC04415A

Measurement of the velocity of neutral fragments by the “correlated ion and neutral time of flight” method combined with “velocity-map imaging”

F. Berthias, L. Feketeová, R. Della Negra, T. Dupasquier, R. Fillol, H. Abdoul-Carime, B. Farizon, M. Farizon and T. D. Märk

Review of Scientific Instruments, 2017, 88
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Cold Ion–Molecule Reactions in the Extreme Environment of a Coulomb Crystal

O. A. Krohn and H. J. Lewandowski

J. Phys. Chem. A, 2024, 128, 1737
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Using pulse shape analysis to improve the position resolution of a resistive anode microchannel plate detector

Davinder Siwal, B.B Wiggins and R.T deSouza

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2015, 804, 144
DOI: 10.1016/j.nima.2015.09.056

F−(H2O)+CH3I ligand exchange reaction dynamics

Björn Bastian, Tim Michaelsen, Milan Ončák, Jennifer Meyer and Roland Wester

Chinese Journal of Chemical Physics, 2020, 33, 210
DOI: 10.1063/1674-0068/cjcp2002018

A multi-plate velocity-map imaging design for high-resolution photoelectron spectroscopy

Steven J. Kregel, Glen K. Thurston, Jia Zhou and Etienne Garand

The Journal of Chemical Physics, 2017, 147
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Imaging the state-to-state charge-transfer dynamics between the spin-orbit excited Ar+(2P1/2) ion and N2

Guodong Zhang, Dandan Lu, Hua Guo and Hong Gao

Nat Commun, 2024, 15
DOI: 10.1038/s41467-024-45344-6

Imaging the Ion–Molecule Reaction Dynamics of O– + CD4

Atilay Ayasli, Petra Tóth, Tim Michaelsen, Thomas Gstir, Fabio Zappa, Dóra Papp, Gábor Czakó and Roland Wester

J. Phys. Chem. A, 2024, 128, 3078
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Dynamic Reaction Mechanisms of ClO¯ with CH3Cl: Comparison Between Direct Dynamics Trajectory Simulations and Experiment

Feng Yu

J. Phys. Chem. A, 2016, 120, 1813
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Charge transfer dynamics of the Ar+(2P3/2) + N2 reaction at very low collision energies

Dasarath Swaraj, Jerin Judy, Fabio Zappa, Viviane C. Schmidt and Roland Wester

The Journal of Chemical Physics, 2026, 164
DOI: 10.1063/5.0322634

Imaging of the charge-transfer reaction of spin–orbit state-selected Ar+(2P3/2) with N2 reveals vibrational-state-specific mechanisms

Guodong Zhang, Dandan Lu, Yufan Ding, Lichang Guan, Shanyu Han, Hua Guo and Hong Gao

Nat. Chem., 2023, 15, 1255
DOI: 10.1038/s41557-023-01278-y

Dynamics of proton transfer from ArH+ to CO

Björn Bastian, Eduardo Carrascosa, Alexander Kaiser, Jennifer Meyer, Tim Michaelsen, Gábor Czakó, William L. Hase and Roland Wester

International Journal of Mass Spectrometry, 2019, 438, 175
DOI: 10.1016/j.ijms.2018.12.004

Isomer-specific product formation in the proton transfer reaction of HOCO+with CO

Eduardo Carrascosa, Martin Stei, Martin A. Kainz and Roland Wester

Molecular Physics, 2015, 113, 3955
DOI: 10.1080/00268976.2015.1075620

The Selective Role of Long‐Range Forces in the Stereodynamics of Ion–Molecule Reactions: The He++Methyl Formate Case From Guided‐Ion‐Beam Experiments

Andrea Cernuto, Fernando Pirani, Luca Matteo Martini, Paolo Tosi and Daniela Ascenzi

ChemPhysChem, 2018, 19, 51
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Dynamics and Novel Mechanisms of SN2 Reactions on ab Initio Analytical Potential Energy Surfaces

István Szabó and Gábor Czakó

J. Phys. Chem. A, 2017, 121, 9005
DOI: 10.1021/acs.jpca.7b08140

Laser-Controlled Ion–Molecule Reaction Kinetics: Be+ + H2O at Variable Reaction Temperatures

Yongxu Peng, Zongao Song, Mengyang Li, Tengyu Gao, Yue Xiao, Xin Wang, Tao Wang, Yurun Xie, Anyang Li and Tiangang Yang

J. Phys. Chem. Lett., 2025, 16, 12379
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Multistate Dynamics and Kinetics of CO2 Activation by Ta+ in the Gas Phase: Insights into Single-Atom Catalysis

Yang Liu, Milan Ončák, Jennifer Meyer, Shaun G. Ard, Nicholas S. Shuman, Albert A. Viggiano and Hua Guo

J. Am. Chem. Soc., 2024, 146, 14182
DOI: 10.1021/jacs.4c03192

Using Ion Imaging to Measure Velocity Distributions in Surface Scattering Experiments

Dan J. Harding, J. Neugebohren, Daniel J. Auerbach, T. N. Kitsopoulos and Alec M. Wodtke

J. Phys. Chem. A, 2015, 119, 12255
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Theoretical Investigation of Bimolecular Carbon Chain Growth Reactions in the Interstellar Media

Anitta Regina and Manikandan Paranjothy

J. Phys. Chem. A, 2024, 128, 2409
DOI: 10.1021/acs.jpca.3c08204

Analysis of the impacts of reactant molecular beam velocity spreads on product velocity resolution in crossed beam experiments

Yufan Ding, Min Cheng and Hong Gao

Chinese Journal of Chemical Physics, 2024, 37, 814
DOI: 10.1063/1674-0068/cjcp2407091

Multilevel Quantum Mechanics Theories and Molecular Mechanics Calculations of the Cl– + CH3I Reaction in Water

Peng Liu, Chen Li and Dunyou Wang

J. Phys. Chem. A, 2017, 121, 8012
DOI: 10.1021/acs.jpca.7b08103

Suppression of low product kinetic energies in reactions of FHO− and Cl−(H2O) with CH3I

Björn Bastian, Tim Michaelsen, Milan Ončák, Jennifer Meyer and Roland Wester

International Journal of Mass Spectrometry, 2021, 462, 116526
DOI: 10.1016/j.ijms.2021.116526

Influence of Vibrational Excitation on the Reaction of F– with CH3I: Spectator Mode Behavior, Enhancement, and Suppression

Tim Michaelsen, Björn Bastian, Atilay Ayasli, Patrick Strübin, Jennifer Meyer and Roland Wester

J. Phys. Chem. Lett., 2020, 11, 4331
DOI: 10.1021/acs.jpclett.0c01095

The H2 + + He proton transfer reaction: quantum reactive differential cross sections to be linked with future velocity mapping experiments

Mario Hernández Vera, Roland Wester and Francesco Antonio Gianturco

J. Phys. B: At. Mol. Opt. Phys., 2018, 51, 014004
DOI: 10.1088/1361-6455/aa97b0

Unexpected Indirect Dynamics in Base-Induced Elimination

Jennifer Meyer, Eduardo Carrascosa, Tim Michaelsen, Björn Bastian, Anyang Li, Hua Guo and Roland Wester

J. Am. Chem. Soc., 2019, 141, 20300
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Fifty years of nucleophilic substitution in the gas phase

Roland Wester

Mass Spectrometry Reviews, 2022, 41, 627
DOI: 10.1002/mas.21705

Probing the Charge-Transfer Potential Energy Surfaces by the Photodissociation of [Ar–N2]+

Zefeng Hua, Yunxiao Zhao, Gaoming Hu, Shaowen Feng, Qiang Zhang, Yang Chen and Dongfeng Zhao

J. Phys. Chem. Lett., 2021, 12, 4012
DOI: 10.1021/acs.jpclett.1c00798

Imaging the Atomistic Dynamics of Single Proton Transfer and Combined Hydrogen/Proton Transfer in the O– + CH3I Reaction

Arnab Khan, Atilay Ayasli, Tim Michaelsen, Thomas Gstir, Milan Ončák and Roland Wester

J. Phys. Chem. A, 2022, 126, 9408
DOI: 10.1021/acs.jpca.2c06887

Rotational Mode Specificity in the F– + CH3Y [Y = F and Cl] SN2 Reactions

István Szabó and Gábor Czakó

J. Phys. Chem. A, 2015, 119, 12231
DOI: 10.1021/acs.jpca.5b06212

Nucleophilic substitution with two reactive centers: The CN− + CH3I case

E. Carrascosa, M. Bawart, M. Stei, F. Linden, F. Carelli, J. Meyer, W. D. Geppert, F. A. Gianturco and R. Wester

The Journal of Chemical Physics, 2015, 143
DOI: 10.1063/1.4934993

Anionic Carbon Chain Growth in Reactions of , , , C2H−, C4H−, and C6H− with C2H2

Björn Bastian, Tim Michaelsen, Jennifer Meyer and Roland Wester

ApJ, 2019, 878, 162
DOI: 10.3847/1538-4357/ab2042

Stretching vibration is a spectator in nucleophilic substitution

Martin Stei, Eduardo Carrascosa, Alexander Dörfler, Jennifer Meyer, Balázs Olasz, Gábor Czakó, Anyang Li, Hua Guo and Roland Wester

Sci. Adv., 2018, 4
DOI: 10.1126/sciadv.aas9544

Influence of the leaving group on the dynamics of a gas-phase SN2 reaction

Martin Stei, Eduardo Carrascosa, Martin A. Kainz, Aditya H. Kelkar, Jennifer Meyer, István Szabó, Gábor Czakó and Roland Wester

Nature Chem, 2016, 8, 151
DOI: 10.1038/nchem.2400

Atomistic dynamics of elimination and nucleophilic substitution disentangled for the F− + CH3CH2Cl reaction

Jennifer Meyer, Viktor Tajti, Eduardo Carrascosa, Tibor Győri, Martin Stei, Tim Michaelsen, Björn Bastian, Gábor Czakó and Roland Wester

Nat. Chem., 2021, 13, 977
DOI: 10.1038/s41557-021-00753-8

Scaling analysis parameters in 3D-focusing velocity map imaging

Ruichang Wu, Bocheng Ding, Yunfei Feng, Kefei Wu, Xin Jin and Xiao-Jing Liu

Meas. Sci. Technol., 2023, 34, 055502
DOI: 10.1088/1361-6501/acb72e

A three-dimensional velocity-map imaging setup designed for crossed ion-molecule scattering studies

Guo-dong Zhang, Li-chang Guan, Zi-feng Yan, Min Cheng and Hong Gao

Chinese Journal of Chemical Physics, 2021, 34, 71
DOI: 10.1063/1674-0068/cjcp2012219

Ion Velocity Map Imaging Study of the Reactive Collisions between Carbon Dioxide and Helium Ion

Qiang Guo, Yaya Zhi, Jie Hu and Shan Xi Tian

J. Phys. Chem. A, 2024, 128, 3821
DOI: 10.1021/acs.jpca.4c01092

A dynamic isotope effect in the nucleophilic substitution reaction between F− and CD3I

Atilay Ayasli, Arnab Khan, Thomas Gstir, Tim Michaelsen, Dóra Papp, Yan Wang, Hongwei Song, Minghui Yang, Gábor Czakó and Roland Wester

Nat Commun, 2025, 16
DOI: 10.1038/s41467-025-57086-0

Nucleophilic Substitution Dynamics: Comparing Wave Packet Calculations with Experiment

M. Kowalewski, J. Mikosch, R. Wester and R. de Vivie-Riedle

J. Phys. Chem. A, 2014, 118, 4661
DOI: 10.1021/jp503974u

Preferential Isomer Formation Observed in H3+ + CO by Crossed Beam Imaging

Eduardo Carrascosa, Martin A. Kainz, Martin Stei and Roland Wester

J. Phys. Chem. Lett., 2016, 7, 2742
DOI: 10.1021/acs.jpclett.6b01028

Towards product vibrational state resolution in the reaction

Dasarath Swaraj, Tim Michaelsen, Arnab Khan, Fabio Zappa, Robert Wild and Roland Wester

Molecular Physics, 2024, 122
DOI: 10.1080/00268976.2023.2194455

Imaging Charge Transfer in a Cation−π System: Velocity-Map Imaging of Ag+(benzene) Photodissociation

Jonathon A. Maner, Daniel T. Mauney and Michael A. Duncan

J. Phys. Chem. Lett., 2015, 6, 4493
DOI: 10.1021/acs.jpclett.5b02240

Accurate ab initio potential energy surface, thermochemistry, and dynamics of the F− + CH3F SN2 and proton-abstraction reactions

István Szabó, Hajnalka Telekes and Gábor Czakó

The Journal of Chemical Physics, 2015, 142
DOI: 10.1063/1.4922616

Opportunities for gas-phase science at short-wavelength free-electron lasers with undulator-based polarization control

Markus Ilchen, Enrico Allaria, Primož Rebernik Ribič, Heinz-Dieter Nuhn, Alberto Lutman, Evgeny Schneidmiller, Markus Tischer, Mikail Yurkov, Marco Calvi, Eduard Prat, Sven Reiche, Thomas Schmidt, Gianluca Aldo Geloni, Suren Karabekyan, Jiawei Yan, Svitozar Serkez, Zhangfeng Gao, Bangjie Deng, Chao Feng, Haixiao Deng, Wolfram Helml, Lars Funke, Mats Larsson, Vitali Zhaunerchyk, Michael Meyer, Tommaso Mazza, Till Jahnke, Reinhard Dörner, Francesca Calegari, Olga Smirnova, Caterina Vozzi, Giovanni De Ninno, Jonas Wätzel, Jamal Berakdar, Sadia Bari, Lucas Schwob, Jérémy R. Rouxel, Shaul Mukamel, Klaus Bartschat, Kathryn Hamilton, Luca Argenti, Nicolas Douguet, Nikolay M. Novikovskiy, Philipp V. Demekhin and Peter Walter

Phys. Rev. Research, 2025, 7
DOI: 10.1103/PhysRevResearch.7.011001

Velocity map imaging spectrometer optimized for reduction of background electrons from scattered UV light

Nicolas Ladda, Fabian Westmeier, Sagnik Das, Wilfried Dreher, Simon T. Ranecky, Tonio Rosen, Krishna Kant Singh, Till Jakob Stehling, Sudheendran Vasudevan, Hendrike Braun, Thomas Baumert, Jochen Mikosch and Arne Senftleben

Review of Scientific Instruments, 2025, 96
DOI: 10.1063/5.0279984

Ion molecule reaction dynamics for disentangling competing reactive pathways

Marcel Meta and Jennifer Meyer

Molecular Physics, 2024, 122
DOI: 10.1080/00268976.2023.2293228

Imaging state-to-state reactive scattering in the Ar+ + H2 charge transfer reaction

Tim Michaelsen, Björn Bastian, Eduardo Carrascosa, Jennifer Meyer, David H. Parker and Roland Wester

The Journal of Chemical Physics, 2017, 147
DOI: 10.1063/1.4983305

Imaging Proton Transfer and Dihalide Formation Pathways in Reactions of F– + CH3I

Eduardo Carrascosa, Tim Michaelsen, Martin Stei, Björn Bastian, Jennifer Meyer, Jochen Mikosch and Roland Wester

J. Phys. Chem. A, 2016, 120, 4711
DOI: 10.1021/acs.jpca.5b11181

Elusive anion growth in Titan’s atmosphere: Low temperature kinetics of the C3N− + HC3N reaction

Jérémy Bourgalais, Nour Jamal-Eddine, Baptiste Joalland, Michael Capron, Muthiah Balaganesh, Jean-Claude Guillemin, Sébastien D. Le Picard, Alexandre Faure, Sophie Carles and Ludovic Biennier

Icarus, 2016, 271, 194
DOI: 10.1016/j.icarus.2016.02.003

Dynamic exit-channel pathways of the microsolvated HOO−(H2O) + CH3Cl SN2 reaction: Reaction mechanisms at the atomic level from direct chemical dynamics simulations

Feng Yu

The Journal of Chemical Physics, 2018, 148
DOI: 10.1063/1.5000400

Dynamical study of the reaction of N+ ions with O2 neutrals

Dasarath Swaraj, Jerin Judy, Fabio Zappa, Albert A Viggiano, Dieter Gerlich and Roland Wester

Phys. Scr., 2025, 100, 025408
DOI: 10.1088/1402-4896/adaa32

Rotational and Isotopic Effects in the H2 + OH+ → H + H2O+ Reaction

Hongwei Song, Anyang Li and Hua Guo

J. Phys. Chem. A, 2016, 120, 4742
DOI: 10.1021/acs.jpca.5b11574

Imaging dynamic fingerprints of competing E2 and SN2 reactions

Eduardo Carrascosa, Jennifer Meyer, Jiaxu Zhang, Martin Stei, Tim Michaelsen, William L. Hase, Li Yang and Roland Wester

Nat Commun, 2017, 8
DOI: 10.1038/s41467-017-00065-x

Imaging Reaction Dynamics of F–(H2O) and Cl–(H2O) with CH3I

Björn Bastian, Tim Michaelsen, Lulu Li, Milan Ončák, Jennifer Meyer, Dong H. Zhang and Roland Wester

J. Phys. Chem. A, 2020, 124, 1929
DOI: 10.1021/acs.jpca.0c00098

Imaging Frontside and Backside Attack in Radical Ion–Molecule Reactive Scattering

Atilay Ayasli, Arnab Khan, Tim Michaelsen, Thomas Gstir, Milan Ončák and Roland Wester

J. Phys. Chem. A, 2023, 127, 5565
DOI: 10.1021/acs.jpca.3c02856

Dynamically Hidden Reaction Paths in the Reaction of CF3+ + CO

Kohei Oda, Takuro Tsutsumi, Srihari Keshavamurthy, Kenji Furuya, P. B. Armentrout and Tetsuya Taketsugu

ACS Phys. Chem Au, 2022, 2, 388
DOI: 10.1021/acsphyschemau.2c00012

Threshold photodetachment spectroscopy of the astrochemical anion CN−

Malcolm Simpson, Markus Nötzold, Alice Schmidt-May, Tim Michaelsen, Björn Bastian, Jennifer Meyer, Robert Wild, Franco A. Gianturco, Milan Milovanović, Viatcheslav Kokoouline and Roland Wester

The Journal of Chemical Physics, 2020, 153
DOI: 10.1063/5.0029841

A versatile apparatus for cold ion–molecule reaction dynamics: Integration of laser-cooled ions with velocity- and quantum-state- controlled molecular beams under ultra-high vacuum

Yue Xiao, Liping Wen, Yurun Xie, Jie Han, Yongxu Peng, Zongao Song, Xin Wang, Tao Wang, Xueming Yang and Tiangang Yang

Review of Scientific Instruments, 2025, 96
DOI: 10.1063/5.0280143

Dynamics of the Oxygen Atom Transfer Reaction between Carbon Dioxide and the Tantalum Cation

Marcel Meta, Maximilian E. Huber, Tim Michaelsen, Atilay Ayasli, Milan Ončák, Roland Wester and Jennifer Meyer

J. Phys. Chem. Lett., 2023, 14, 5524
DOI: 10.1021/acs.jpclett.3c01078

Charge transfer dynamics in Ar+ + CO

T. Michaelsen, T. Gstir, B. Bastian, E. Carrascosa, A. Ayasli, J. Meyer and R. Wester

Molecular Physics, 2021, 119, e1815885
DOI: 10.1080/00268976.2020.1815885

Velocity Map Imaging Study of Charge-Transfer and Proton-Transfer Reactions of CH3 Radicals with H3+

Linsen Pei, Eduardo Carrascosa, Nan Yang, Stefano Falcinelli and James M. Farrar

J. Phys. Chem. Lett., 2015, 6, 1684
DOI: 10.1021/acs.jpclett.5b00517

Velocity map ion imaging study of Ar2+ photodissociation

J.A. Maner, D.T. Mauney and M.A. Duncan

Chemical Physics Letters, 2017, 671, 182
DOI: 10.1016/j.cplett.2017.01.042

Dissociation energies of Ag–RG (RG = Ar, Kr, Xe) and AgO molecules from velocity map imaging studies

Graham A. Cooper, Aras Kartouzian, Alexander S. Gentleman, Andreas Iskra, Robert van Wijk and Stuart R. Mackenzie

The Journal of Chemical Physics, 2015, 143
DOI: 10.1063/1.4931486

Ion–Molecule Reaction Dynamics

Jennifer Meyer and Roland Wester

Annu. Rev. Phys. Chem., 2017, 68, 333
DOI: 10.1146/annurev-physchem-052516-044918