Formation of excited singlet toluene in the radiolysis of alkane containing toluene in the solid phase at 77 K |
| |
| Affiliation: | 1. Centre of advanced study in Physics, Department of Physics, Panjab University, Chandigarh, India 160014;2. Department of Physics, DAV University, Jalandhar, Punjab, India 144012;3. S.D. (P.G.) College, Panipat, Haryana, India 132103;1. GreenUPorto – Sustainable Agrifood Production Research Centre & Department of Biology, Faculty of Sciences, University of Porto, Rua Do Campo Alegre S/n, 4169-007, Porto, Portugal;2. CESAM - Center of Environmental and Marine Studies & Department of Biology, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal;3. CIBIO INBIO, Universidade Do Porto, Campus Agrario de Vairao, 4485-661, Vairao, Portugal;4. University of Coimbra, Centre for Functional Ecology, Department of Life Sciences, Calçada Martim de Freitas, 3000-456, Coimbra, Portugal;5. Université de Sfax, Laboratoire de Génie de L’Environnement et Ecotechnologie (LGEET - LR16ES19), Ecole Nationale D’Ingénieurs de Sfax (ENIS), Route de Soukra, Km 4.5; B.P. 1173, 3038, Sfax, Tunisia;6. ECT Oekotoxikologie GmbH, Böttgerst. 2-14, 65439, Flörsheim, Germany;7. Laboratory of Biotechnology and Valorisation of Plant Genetic Resources, University of Sultan Moulay Slimane, Faculty of Science and Techniques, P.O. 523, Beni-Mellal, 23000, Morocco;1. Victorian Institute of Forensic Medicine, 65 Kavanagh St, Southbank, VIC 3006, Australia;2. Department of Forensic Medicine, Monash University, Australia;1. Department of Food Science, University of Massachusetts, Amherst, MA 01003, USA;2. Department of Chemistry and Food Science, Framingham State University, Framingham, MA 01701, USA |
| |
| Abstract: | When alkane containing a small amount of toluene is irradiated by γ-ray or X-ray in the solid state at 77 K, luminescence from excited toluene is observed. The formation of the excited toluene is not due to direct excitation of toluene by γ-ray or Čerenkov light, but to the rapid energy transfer from the irradiated alkane to toluene. The intensity of luminescence from the excited toluene in the cyclopentane matrix does not correspond at all to the amounts of toluene ions, which are formed by pre-irradiation. The energy transfer is not caused by a free hole and an electron, but by an exciton. Furthermore, the effect of additives on the fluorescence suggests that the Wannier exciton or mobile ion-pair is responsible for the energy transfer in cyclopentane containing toluene in the solid phase at 77 K. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
