Ionization of NO2 clusters in a supersonic nozzle beam: appearance of the odd-number cluster ions of NO2 |
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| Affiliation: | 1. Hefei National Laboratory of Physical Sciences at the Microscale, School of Chemistry and Materials Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China;2. Hefei National Laboratory for Physical Sciences at the Microscale, Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China;3. Department of Computer Science, University of British Columbia, Vancouver, BC, Canada;4. Department of Basic Sciences, Farhangian University, Tehran, Iran;1. Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario L2S 3A1, Canada;2. Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, MA 02138, United States |
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| Abstract: | Cluster ions (NO2)+n, n = 2−13, were detected mass spectrometrically in a supersonic nozzle beam by both photon- and electron-impact ionization. The odd-number cluster ions (NO2)+2m+1 appeared dominantly over the even-number cluster ions (NO2)+2m. The results are consistently explained by the dissociative ionization of the (sym-N2O4)n clusters and ionization (involving intra-cluster charge transfer) of the (sym-N2O4)nNO2 clusters produced via supersonic expansion of NO2: (sym-N2O4)2 + hν → (sym-N2O4)n–1NO+2 + NO2 + e− and (sym-N2O4)nNO2 + hν → (sym-N2O4)nNO+2 + e−. |
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