# DELAYED EXCIMER FLUORESCENCE OF PYRENE.

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/14786

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 Title: DELAYED EXCIMER FLUORESCENCE OF PYRENE. Creators: Smith, F. J.; McGlynn, S. P. Issue Date: 1965 Publisher: Ohio State University Abstract: The delayed fluorescence and delayed excimer fluorescence of pyrene in liquid solution are shown to originate in triplet-triplet annihilation, and the triplet population is shown to be kinetically limited by first order decay mechanisms. It is shown that the delayed excimer fluorescence of pyrene crystal at $77^{\circ}K$ also originates in triplet-triplet annihilation, but that the triplet population is kinetically governed by second order annihilative processes. It is also shown that at lower temperatures and higher viscosities triplet-triplet annihilation results predominantly in the initial production of excited monomers, whereas at higher temperatures the initial production of excimers also becomes an important process. Description: Author Institution: Department of Chemistry, Louisiana State University URI: http://hdl.handle.net/1811/14786 Other Identifiers: 1965-F-2