Manifestation of intramolecular vibrational energy redistribution on electronic relaxation in large molecules |
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| Affiliation: | 1. Centre of Excellence for Photoconversion, Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, P.O. Box 522, Belgrade, 11001, Serbia;2. University of Belgrade, Faculty of Physics, Studentski Trg 12-16, Belgrade, 11000, Serbia;1. Shandong Provincial Key Laboratory of Depositional Mineralization & Sedimentary Minerals, College of Earth Science & Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, China;2. Department of Geology, Southern Illinois University, Carbondale 62901, IL, USA;3. Shandong Xinjulong Energy Co., Ltd., Heze 272200, Shandong, China;1. College of Architecture and Civil Engineering, Shenyang University of Technology, 110870, Shenyang, China;2. College of physical science and technology, Shenyang Normal University, 110034, Shenyang, China |
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| Abstract: | Some universal characteristics are discussed of the decay lifetimes and fluorescence quantum yields from the S1 manifold of large molecules, which originate from the coupling between intrastate vibrational energy redistribution and interstate electronic relaxation. The time-resolved total fluorescence decay from the S1 state of jet-cooled 9-cyanoanthracene exhibits non-exponential decay in the energy range Ev= 1200–1740 cm−1 above the S1 origin, which does not originate from dephasing but rather manifests the effects of intrastate intermediate level structure for vibrational energy redistribution on intersystem crossing. |
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