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The electronic spectra and excited state dipole moment of 2-fluoropyridine
Affiliation:1. Graduate School of Science and Technology, Hirosaki University, 3 Bunkyo-cho, Hirosaki, Aomori 036-8560, Japan;2. Energy Conversion Engineering Laboratory, Institute of Regional Innovation (IRI), Hirosaki University, 2-1-3 Matsubara, Aomori 030-0813, Japan;3. Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China;1. Department of Chemistry, Al-Azhar University (Men’s Campus), Nasr City, 11884, Cairo, Egypt;2. Department of Chemistry, Faculty of Science, Jazan University, Jazan, 82621, Saudi Arabia;3. Department of Chemistry, Faculty of Science, King Khalid University, Abha, Saudi Arabia;4. Department of Chemistry, Sultan Qaboos University, P.O. Box 36, Al Khod, Muscat, Oman;5. Department of Chemistry, 110 Science Place, University of Saskatchewan, Saskatoon, SK S7N 5C9, Canada;1. Department of Chemistry, Texas A&M University, College Station, TX 77843-3255, USA;2. National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Department of Health and Human Services, 8600 Rockville Pike, Bethesda, MD 20894, USA
Abstract:The electronic absorption spectrum in the vapour state and in solution in different solvents in the region 3000–1900 Å and the fluorescence and phosphorescence emission spectra in ethanol or cyclohexane at 77 K have been studied for 2-fluoropyridine and analysed. Two systems of absorption band corresponding to the π→π* transition II and π→π* transition III have been observed and the excited state dipole moments have been determined from the solvent-induced shifts of the electronic absorption bands. The half-life of phosphorescence in cyclohexane at 77 K is found to be 3.5 s.
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