{"title":"Laser Induced Fluorescence From CF2 Excited at 248 Nm","authors":"G. Wlnkelmann, R. Kuhls, R. Osmanow, E. Linke","doi":"10.1155/1993/56828","DOIUrl":null,"url":null,"abstract":"KrF–laser-induced fluorescence from CF2-radicals was investigated during photolysis of CF2Cl2 and CF2HCl by 193 nm laserlight. In contrast to other publications, which postulated single-vibronic-level fluorescence, the fluorescence is caused by excitation from four closely situated absorption bands. These fluorescence bands of four series, are assigned to Ã1B1(v′1,6−2v′1,0) − X˜1A1(v″1,v″2,0) transitions with Δv1=0 and 0 ≤ v″2 ≤ 30. The Franck – Condon factors of the Ã1B1 (0, 6, 0) –X˜1A1 (0, v″2, 0) transitions, the frequencies of the bending vibration (ω″2 =673± 2cm–1) and the anharmonicity constants x″22 = –0.94 ± 0.08 cm-1 and x′22 = –0.44 ± 0.10 cm–1 were more precisely determined. For the first time higher anharmonicity constants are evaluated with x″12","PeriodicalId":296295,"journal":{"name":"Laser Chemistry","volume":"18 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Laser Chemistry","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1155/1993/56828","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
Abstract
KrF–laser-induced fluorescence from CF2-radicals was investigated during photolysis of CF2Cl2 and CF2HCl by 193 nm laserlight. In contrast to other publications, which postulated single-vibronic-level fluorescence, the fluorescence is caused by excitation from four closely situated absorption bands. These fluorescence bands of four series, are assigned to Ã1B1(v′1,6−2v′1,0) − X˜1A1(v″1,v″2,0) transitions with Δv1=0 and 0 ≤ v″2 ≤ 30. The Franck – Condon factors of the Ã1B1 (0, 6, 0) –X˜1A1 (0, v″2, 0) transitions, the frequencies of the bending vibration (ω″2 =673± 2cm–1) and the anharmonicity constants x″22 = –0.94 ± 0.08 cm-1 and x′22 = –0.44 ± 0.10 cm–1 were more precisely determined. For the first time higher anharmonicity constants are evaluated with x″12
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