Diksha Garg, Pragya Chopra, Jason W.L. Lee, Denis Tikhonov, Sonu Kumar, Oender Akcaalan, Felix Allum, Rebecca Boll, Alexander A. Butler, Benjamin Erk, Eva Gougoula, Sébastien Gruet, Lanhai He, David Heathcote, Ellen Jones, Mehdi Kazemi, Jan Lahl, Alexander K. Lemmens, Zhihao Liu, Donatella Loru, Sylvain Maclot, Robert Mason, James Merrick, Erland Müller, Terry Mullins, Christina C. Papadopoulou, Christopher Passow, Jasper Peschel, Marius Plach, Daniel Ramm, Patrick Andrew Robertson, Dimitrios Rompotis, Alcides Simao, Amanda L Steber, Ayhan Tajalli, Atia Tul-Noor, Nidin Vadassery, Ivo S. Vinklarek, Simone Techert, Jochen Küpper, Anouk Rijs, Daniel Rolles, Mark Brouard, Sadia Bari, Per Eng-Johnsson, Claire Vallance, Michael Burt, Bastian Manschwetus, Melanie Schnell
{"title":"Ultrafast dynamics of fluorene initiated by highly intense laser fields","authors":"Diksha Garg, Pragya Chopra, Jason W.L. Lee, Denis Tikhonov, Sonu Kumar, Oender Akcaalan, Felix Allum, Rebecca Boll, Alexander A. Butler, Benjamin Erk, Eva Gougoula, Sébastien Gruet, Lanhai He, David Heathcote, Ellen Jones, Mehdi Kazemi, Jan Lahl, Alexander K. Lemmens, Zhihao Liu, Donatella Loru, Sylvain Maclot, Robert Mason, James Merrick, Erland Müller, Terry Mullins, Christina C. Papadopoulou, Christopher Passow, Jasper Peschel, Marius Plach, Daniel Ramm, Patrick Andrew Robertson, Dimitrios Rompotis, Alcides Simao, Amanda L Steber, Ayhan Tajalli, Atia Tul-Noor, Nidin Vadassery, Ivo S. Vinklarek, Simone Techert, Jochen Küpper, Anouk Rijs, Daniel Rolles, Mark Brouard, Sadia Bari, Per Eng-Johnsson, Claire Vallance, Michael Burt, Bastian Manschwetus, Melanie Schnell","doi":"10.1039/d3cp05063g","DOIUrl":null,"url":null,"abstract":"We present an investigation of the ultrafast dynamics of the polycyclic aromatic hydrocarbon fluorene initiated by an intense femtosecond near-infrared laser pulse (810~nm) and probed by a weak visible pulse (405~nm). Using a multichannel detection scheme (mass spectra, electron and ion velocity-map imaging), we provide a full disentanglement of the complex dynamics of the vibronically excited parent molecule, its excited ionic states, and fragments. We observed various channels resulting from the strong-field ionization regime. In particular, we observed the formation of the unstable tetracation of fluorene, above-threshold ionization features in the photoelectron spectra, and evidence of ubiquitous secondary fragmentation. We produced a global fit of all observed time-dependent photoelectron and photoion channels. This global fit includes four parent ions extracted from the mass spectra, 15 kinetic-energy-resolved ionic fragments extracted from ion velocity map imaging, and five photoelectron channels obtained from electron velocity map imaging. The fit allowed for the extraction of 60 lifetimes of various metastable photoinduced intermediates.","PeriodicalId":99,"journal":{"name":"Physical Chemistry Chemical Physics","volume":null,"pages":null},"PeriodicalIF":2.9000,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physical Chemistry Chemical Physics","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1039/d3cp05063g","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
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Abstract
We present an investigation of the ultrafast dynamics of the polycyclic aromatic hydrocarbon fluorene initiated by an intense femtosecond near-infrared laser pulse (810~nm) and probed by a weak visible pulse (405~nm). Using a multichannel detection scheme (mass spectra, electron and ion velocity-map imaging), we provide a full disentanglement of the complex dynamics of the vibronically excited parent molecule, its excited ionic states, and fragments. We observed various channels resulting from the strong-field ionization regime. In particular, we observed the formation of the unstable tetracation of fluorene, above-threshold ionization features in the photoelectron spectra, and evidence of ubiquitous secondary fragmentation. We produced a global fit of all observed time-dependent photoelectron and photoion channels. This global fit includes four parent ions extracted from the mass spectra, 15 kinetic-energy-resolved ionic fragments extracted from ion velocity map imaging, and five photoelectron channels obtained from electron velocity map imaging. The fit allowed for the extraction of 60 lifetimes of various metastable photoinduced intermediates.
期刊介绍:
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