{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,29]],"date-time":"2025-10-29T03:12:29Z","timestamp":1761707549865,"version":"build-2065373602"},"reference-count":25,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2002,11,26]],"date-time":"2002-11-26T00:00:00Z","timestamp":1038268800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Rapid Comm Mass Spectrometry"],"published-print":{"date-parts":[[2003,1,15]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    This paper presents a report on the ionization\/dissociation of some representative chlorofluoro\u2010carbons (CFCs) induced by corona discharges in air at atmospheric pressure. Both positive and negative ions formed from Freons 1,1,1\u2010trichlorotrifluoroethane (CFC 113a), 1,1,2\u2010trichlorotrifluoroethane (CFC 113), and 1,1,1,2\u2010tetrachlorodifluoroethane (CFC 112a) were analyzed using an atmospheric pressure chemical ionization mass spectrometry (APCI\u2010MS) instrument. Energy\u2010resolved mass spectra were obtained by modulating the kinetic energy of the ions via adjustment of the sampling cone potential (V\n                    <jats:sub>cone<\/jats:sub>\n                    ). Positive ion spectra of the CFCs (M) at low V\n                    <jats:sub>cone<\/jats:sub>\n                    show no signals due to either M\n                    <jats:sup>+\u00b7<\/jats:sup>\n                    or MH\n                    <jats:sup>+<\/jats:sup>\n                    but only those due to species [M\u2005\u2212\u2005Cl]\n                    <jats:sup>+<\/jats:sup>\n                    and CX\n                    <jats:sub>3<\/jats:sub>\n                    <jats:sup>+<\/jats:sup>\n                    (X\u2005=\u2005Cl, F), likely formed via C\u2013Cl and C\u2013C bond cleavages following ionization via charge exchange. Charge localization in the products of C\u2013C bond cleavage in M\n                    <jats:sup>+\u00b7<\/jats:sup>\n                    is driven by the stability of the neutral fragment. At low V\n                    <jats:sub>cone<\/jats:sub>\n                    the hydrates [M\u2005\u2212\u2005Cl]\n                    <jats:sup>+<\/jats:sup>\n                    (H\n                    <jats:sub>2<\/jats:sub>\n                    O) are also observed. In the case of 1,1,2,\u2010trichlorotrifluoroethane, [M\u2005\u2212\u2005F]\n                    <jats:sup>+<\/jats:sup>\n                    species also form as a result of ion\u2010molecule reactions. As V\n                    <jats:sub>cone<\/jats:sub>\n                    is increased collision\u2010induced dissociation of [M\u2005\u2212\u2005Cl]\n                    <jats:sup>+<\/jats:sup>\n                    and [M\u2005\u2212\u2005F]\n                    <jats:sup>+<\/jats:sup>\n                    , i.e., the perhalogenated cations C\n                    <jats:sub>2<\/jats:sub>\n                    X\n                    <jats:sub>5<\/jats:sub>\n                    <jats:sup>+<\/jats:sup>\n                    (X\u2005=\u2005Cl, F), takes place via carbene elimination. In some cases such elimination is preceded or accompanied by rearrangements involving transfer of halogen from one carbon to the other. Evidence is also presented for the occurrence of a condensation reaction of C\n                    <jats:sub>2<\/jats:sub>\n                    Cl\n                    <jats:sub>3<\/jats:sub>\n                    F\n                    <jats:sub>2<\/jats:sub>\n                    <jats:sup>+<\/jats:sup>\n                    with water to form a C\n                    <jats:sub>2<\/jats:sub>\n                    Cl\n                    <jats:sub>2<\/jats:sub>\n                    F\n                    <jats:sub>2<\/jats:sub>\n                    HO\n                    <jats:sup>+<\/jats:sup>\n                    species via elimination of HCl. Negative ion spectra are dominated by Cl\n                    <jats:sup>\u2212<\/jats:sup>\n                    and its ion\u2010neutral complexes with\u2005M and with water. Additional components of the plasma include ion\u2010neutral complexes O\n                    <jats:sub>3<\/jats:sub>\n                    <jats:sup>\u2212<\/jats:sup>\n                    (M), the molecular anion M\n                    <jats:sup>\u2212<\/jats:sup>\n                    (observed only with 1,1,2\u2010trichlorotrifluoroethane), and an interesting species corresponding to [M\u2005\u2212\u2005Cl\u2005+\u2005O]\n                    <jats:sup>\u2212<\/jats:sup>\n                    . The origin and structure of these [M\u2005\u2212\u2005Cl\u2005+\u2005O]\n                    <jats:sup>\u2212<\/jats:sup>\n                    species are discussed in terms of available thermochemical and reactivity data and current mechanistic views concerning reaction of O\n                    <jats:sub>2<\/jats:sub>\n                    <jats:sup>\u2212<\/jats:sup>\n                    with halogenated compounds. The observation of both positive and negative ions containing oxygen is of special relevance to development of new processes for the treatment of volatile organic compounds (VOCs) based on oxidative decomposition induced by corona discharges in air at room temperature and pressure. Copyright \u00a9 2002 John Wiley &amp; Sons, Ltd.\n                  <\/jats:p>","DOI":"10.1002\/rcm.870","type":"journal-article","created":{"date-parts":[[2002,12,12]],"date-time":"2002-12-12T09:00:48Z","timestamp":1039683648000},"page":"1-8","source":"Crossref","is-referenced-by-count":14,"title":["Positive and negative gas\u2010phase ion chemistry of chlorofluorocarbons in air at atmospheric pressure"],"prefix":"10.1002","volume":"17","author":[{"given":"Elisabetta","family":"Bosa","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Cristina","family":"Paradisi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gianfranco","family":"Scorrano","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2002,11,26]]},"reference":[{"key":"e_1_2_6_2_2","doi-asserted-by":"publisher","DOI":"10.1038\/249810a0"},{"key":"e_1_2_6_3_2","doi-asserted-by":"publisher","DOI":"10.1351\/pac199668051083"},{"key":"e_1_2_6_3_3","first-page":"312","volume":"2","author":"Vercammen KLL","year":"1997","journal-title":"J. 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