Temperature dependence of singlet—triplet intersystem crossing in anthracene crystals

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DOIResolve DOI: http://doi.org/10.1063/1.1840532
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TypeArticle
Journal titleThe Journal of Chemical Physics
ISSN0021-9606
Volume46
Issue11
Pages42484251; # of pages: 4
Subjectexcitons; polycyclic aromatic hydrocarbons; activation energies; radationless transitions; vibrational states
AbstractThe formation of triplet excitons from singlet excitons via a radiationless transition (intersystem crossing) is studied in anthracene crystals. Using blue exciting light with 430 mμ>λ>350 mμ the temperature dependence of the intersystem crossing is found to follow an exponential law with an activation energy of 800±50 cm−1. It is concluded that this transition starts from a vibrationally excited single state and involves the second triplet state. The total energy of this vibrational state is about 26 100 cm−1 in good agreement with that suggested by Kellogg, 26 050 cm−1, for an excited triplet level. No emission from the triplet—triplet transition could be observed.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada
Peer reviewedYes
NRC number9536
NPARC number21274650
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Record identifier76c5c3fe-0275-4e3e-81bc-1912cf9cf429
Record created2015-03-19
Record modified2016-05-09
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