Photophysical properties of tetracene derivatives in solution |
| |
| Institution: | 1. Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, Taiwan;2. Department of Electrophysics, National Chiayi University, Chiayi, Taiwan;3. National Synchrotron Radiation Research Center, Hsinchu, Taiwan;1. Department of Physics, Bharathiar University, Coimbatore, 641046, Tamil Nadu, India;2. Laboratoire de Physique des Lasers, Atomes et Molécules, University de Lille, France;3. Department of Medical Physics, Bharathiar University, Coimbatore, 641046, Tamil Nadu, India;4. Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia;5. Department of BioNano Technology, Gachon University, GyeongGi –Do, 13120, Republic of Korea;1. Key Laboratory for Advanced Materials, Institute of Fine Chemicals and School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, PR China;2. Key Laboratory for Advanced Materials, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, PR China;1. Department of Physics, Chemistry, and Biology (IFM), Linköping University, Linköping, Sweden;2. Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE, UK;3. Donostia International Physics Center (DIPC), Donostia, Euskadi, Spain;4. Departament de Ciència de Materials i Química Física, Universitat de Barcelona, Barcelona, Catalunya, Spain;5. Inorganic Chemistry, University of Oxford, Oxford, UK;1. Department of Chemistry and Pharmacy and Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany;2. Computer-Chemie-Centrum (CCC), Department of Chemistry and Pharmacy, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nägelsbachstraße 25, 91052 Erlangen, Germany;3. Department of Chemistry, University of Alberta, Edmonton, Alberta T62G2, Canada |
| |
| Abstract: | Photophysical properties of three tetracene (TET) derivatives were investigated in solution. The quantum yield of intersystem crossing (QISC) and the fluorescence lifetime (τF) or 5-monophenyltetracene (MPT) and 5-naphthyltetracene (NAT) are similar to the parent molecule: QISC = 0.6–0.7, τF = 4.8–5.2 ns. Distinctly different properties were found for 5,12-diphenyltetracene (DPT): QISC = 0.17, τF = 15.2 ns. Of the molecules investigated only in DPT is (S1-T2) ISC a thermally activated process. The frequency factor A and the experimental activation energy Ea were determined according to an Arrhenius-type relationship. With Ea the energy of the T2 state can be estimated. The T1 state energy of DPT was measured with the method of reversible triplet energy transfer. These results permit to explain photophysical properties on the basis of a schematic energy level diagram and emphasize the role of higher triplet states in molecular deactivation processes. Previously we found thermally activated ISC in rubrene (RUB). The frequency factor of DPT exceeds that of RUB by more than one order of magnitude. This difference is discussed with respect to the effect of steric hindrances in RUB. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
