Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 135, Issue 46, Pages 17278-17281Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja409266s
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Funding
- National Science Foundation [CHE-1152677]
- U.S. Department of Education GAANN [P200A120170]
- Direct For Mathematical & Physical Scien [1152677] Funding Source: National Science Foundation
- Division Of Chemistry [1152677] Funding Source: National Science Foundation
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The dynamics of singlet fission (SF) are studied in monoclinic and orthorhombic crystals of 1,6-diphenyl-1,3,5-hexatriene. Picosecond time-resolved fluorescence measurements and the presence of a strong magnetic field effect indicate that up to 90% of the initially excited singlets undergo SF in both forms. The initial SF and subsequent triplet pair dissociation rates are found to be more rapid in the monoclinic crystal by factors of 1.5 and 3.5, respectively. These results provide clear evidence that molecular organization affects the rates of triplet pair formation and separation, both important parameters for determining the ultimate utility of a SF material.
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