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All three fragment ions are detected in coincidence, and their momentum vectors are determined by employing a COLTRIMS reaction microscope. The detailed kinematical information of three deprotonation fragmentation channels of H+ + C3H2+ + C3H3+, H+ + C2H3+ + C4H2+, and H+ + C2H2+ + C4H3+ are obtained. By analyzing the momentum and energy correlation spectra among all the three fragment ions, we find that all the three channels are primarily generated by sequential fragmentation processes. Each channel has two deprotonation pathways, corresponding to proton emission in the first or second step of sequential fragmentation, respectively. These results provide insight into the mechanisms and dynamics of deprotonation and ring-breaking reactions in the three-body fragmentation processes of aromatic ring molecules.<\/jats:p>","DOI":"10.1063\/5.0232319","type":"journal-article","created":{"date-parts":[[2024,9,25]],"date-time":"2024-09-25T16:09:19Z","timestamp":1727280559000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":5,"title":["Three-body deprotonation fragmentation dynamics of C6H63+ induced by electron-impact ionization"],"prefix":"10.1063","volume":"161","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4104-1162","authenticated-orcid":false,"given":"Xiaorui","family":"Xue","sequence":"first","affiliation":[{"name":"MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi\u2019an Jiaotong University , Xi\u2019an 710049,","place":["China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7076-5143","authenticated-orcid":false,"given":"Jiaqi","family":"Zhou","sequence":"additional","affiliation":[{"name":"MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi\u2019an Jiaotong University , Xi\u2019an 710049,","place":["China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9037-2312","authenticated-orcid":false,"given":"Xintai","family":"Hao","sequence":"additional","affiliation":[{"name":"MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi\u2019an Jiaotong University , Xi\u2019an 710049,","place":["China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1631-5731","authenticated-orcid":false,"given":"Shaokui","family":"Jia","sequence":"additional","affiliation":[{"name":"MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi\u2019an Jiaotong University , Xi\u2019an 710049,","place":["China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0004-3881-9879","authenticated-orcid":false,"given":"Qingrui","family":"Zeng","sequence":"additional","affiliation":[{"name":"MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi\u2019an Jiaotong University , Xi\u2019an 710049,","place":["China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6132-092X","authenticated-orcid":false,"given":"Xueguang","family":"Ren","sequence":"additional","affiliation":[{"name":"MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi\u2019an Jiaotong University , Xi\u2019an 710049,","place":["China"]}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"317","published-online":{"date-parts":[[2024,9,25]]},"reference":[{"key":"2024092510032119500_c1","doi-asserted-by":"publisher","first-page":"826","DOI":"10.1126\/science.1157617","article-title":"The role of excited-state topology in three-body dissociation of sym -triazine","volume":"321","year":"2008","journal-title":"Science"},{"key":"2024092510032119500_c2","doi-asserted-by":"publisher","first-page":"123202","DOI":"10.1103\/physrevlett.109.123202","article-title":"Strong molecular alignment dependence of H2 electron impact ionization dynamics","volume":"109","year":"2012","journal-title":"Phys. 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