biostudies-literatureMatsuda AMinistry of Education, Culture, Sports, Science and Technology29862-29868https://www.ebi.ac.uk/biostudies/studies/S-EPMC8582076biostudies-literatureUnknown6(44)Association reactions by femtosecond laser filamentation in gaseous C₂H₄ were studied by time-of-flight mass spectrometry of neutral reaction products. Direct sampling from the reaction cell to a mass spectrometer via a differential pumping stage allowed the identification of various hydrocarbon molecules C _<i>n</i> H _<i>m</i> with <i>n</i> = 3-7 and <i>m</i> = 4-7, which includes species not observed in the previous studies. It was found that products containing three and four carbon atoms dominate the mass spectrum with smaller yields for higher-mass species, suggesting that carbon chain growth proceeds through the reaction with C₂H₄ in the reaction cell. The product distribution showed a clear dependence on the laser pulsACS omegaAssociation Reaction of Gaseous C₂H₄ in Femtosecond Laser Filaments Studied by Time-of-Flight Mass Spectrometry.PMC8582076JP17K05094JP21K03521JP26620004Tani KMatsuda AHishikawa ATakeuchi YHayakawa YfalseAssociation Reaction of Gaseous C₂H₄ in Femtosecond Laser Filaments Studied by Time-of-Flight Mass Spectrometry.Association reactions by femtosecond laser filamentation in gaseous C₂H₄ were studied by time-of-flight mass spectrometry of neutral reaction products. Direct sampling from the reaction cell to a mass spectrometer via a differential pumping stage allowed the identification of various hydrocarbon molecules C _<i>n</i> H _<i>m</i> with <i>n</i> = 3-7 and <i>m</i> = 4-7, which includes species not observed in the previous studies. It was found that products containing three and four carbon atoms dominate the mass spectrum with smaller yields for higher-mass species, suggesting that carbon chain growth proceeds through the reaction with C₂H₄ in the reaction cell. The product distribution showed a clear dependence on the laser puls2021-01-01T00:00:00Z2021 Nov2025-04-04T10:21:55.072Z2022-02-11T12:46:59.213ZS-EPMC85820763477865910.1021/acsomega.1c04354