2024-03-28T22:04:49Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/84562022-11-17T02:08:08Zhdl_2115_20045hdl_2115_139Solvent-assisted intramolecular vibrational energy redistribution of S1 perylene in ketone solventsKiba, TakayukiSato, Shin-ichiroAkimoto, SeijiKasajima, TatsuyaYamazaki, Iwao430We investigated vibrational energy relaxations of S1 perylene at an excess energy of ca. 2800 cm-1 in several ketone solvents by femtosecond time-resolved fluorescence measurements. Temporal evolution of fluorescence emissions occurs on the following distinct timescales: 70 - 330 fs, 0.6 - 1.1 ps and 1.8 - 4.9 ps. The latter two was assigned to the intramolecular vibrational redistribution (IVR), and to the solvent-assisted IVR (SA-IVR), respectively. In SA-IVR, intramolecular vibrational couplings are affected by elastic or quasi-elastic interactions between solute and solvents. Solvent dependence of the SA-IVR rates can be explained qualitatively by the tier V-V coupling mechanism.ElsevierJournal Articleapplication/pdfhttp://hdl.handle.net/2115/8456https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/8456/1/jphotochem_178%282-3%29_201-207.pdf1010-6030Journal of Photochemistry and Photobiology A: Chemistry1782-32012072006-03-20enginfo:doi/10.1016/j.jphotochem.2005.09.032author