Dynamics of energy transport in ternary molecular solids. II. Time evolution of naphthalene fluorescence
dc.contributor.author | Argyrakis, Panos | en_US |
dc.contributor.author | Kopelman, Raoul | en_US |
dc.date.accessioned | 2006-04-07T18:40:23Z | |
dc.date.available | 2006-04-07T18:40:23Z | |
dc.date.issued | 1983-07-15 | en_US |
dc.identifier.citation | Argyrakis, Panos, Kopelman, Raoul (1983/07/15)."Dynamics of energy transport in ternary molecular solids. II. Time evolution of naphthalene fluorescence." Chemical Physics 78(2): 251-263. <http://hdl.handle.net/2027.42/25161> | en_US |
dc.identifier.uri | http://www.sciencedirect.com/science/article/B6TFM-44XN1TR-2J/2/2e13c3ccca8b60919c717895a4490e2a | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/25161 | |
dc.description.abstract | The spectrally resolved time-evolution of free and trapped singlet excitons was obtained at liquid-helium temperature for ternary crystals of perdeuteronaphthalene/naphthalene/betamethylnaphthalene (host/guest/supertrap). The naphthalene guest (donor) concentration varied between 0.30 and 0.99 mole fraction, while the supertrap (acceptor) concentrations were 10-4-10-5. At the lower guest concentrations (0.50 and below) the naphthalene-exciton decay time approaches the natural lifetime ([approximate] 122 ns). At higher concentrations, the decay is much shorter and extremely non-exponential. This behavior is inconsistent with simple homogeneous kinetics schemes that use a time-independent rate constant for energy transport. Above the percolation concentration (0.60 naphthalene) we fitted the experimental results with a random-flight-kinetic model, incorporating correlated random walks on the percolating guest cluster. The best fit was obtained for a "coherence length" (mean free path) of [approximate] 102 lattice units. These results are in good agreement with previous steady-state studies on the same samples, and seem to indicate a partial coherence of the exciton transport in both pure and substitutionally disordered crystals at these low temperatures. | en_US |
dc.format.extent | 1182264 bytes | |
dc.format.extent | 3118 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.language.iso | en_US | |
dc.publisher | Elsevier | en_US |
dc.title | Dynamics of energy transport in ternary molecular solids. II. Time evolution of naphthalene fluorescence | en_US |
dc.type | Article | en_US |
dc.rights.robots | IndexNoFollow | en_US |
dc.subject.hlbsecondlevel | Physics | en_US |
dc.subject.hlbsecondlevel | Mathematics | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, USA | en_US |
dc.contributor.affiliationum | Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, USA | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/25161/1/0000597.pdf | en_US |
dc.identifier.doi | http://dx.doi.org/10.1016/0301-0104(83)85112-X | en_US |
dc.identifier.source | Chemical Physics | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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