Mechanism of Singlet Fission in Thin Films of 1,3-Diphenylisobenzofuran
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388963%3A_____%2F14%3A00429549" target="_blank" >RIV/61388963:_____/14:00429549 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1021/ja501337b" target="_blank" >http://dx.doi.org/10.1021/ja501337b</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/ja501337b" target="_blank" >10.1021/ja501337b</a>
Alternative languages
Result language
angličtina
Original language name
Mechanism of Singlet Fission in Thin Films of 1,3-Diphenylisobenzofuran
Original language description
In order to elucidate the mechanism of singlet fission in thin films of 1,3-diphenylisobenzofuran (1) we have performed ultrafast transient absorption spectroscopy as a function of sample temperature and excitation fluence on polycrystalline thin films composed of two polymorphs. Our earlier investigations revealed that films enriched in a particular polymorph of 1 displayed near 200% efficiency for triplet formation at 77 K, while films composed primarily of a second polymorph had a very low triplet quantum yield. Present data confirm the triplet yield disparities in the two polymorphs and demonstrate the distinct fates of the initially prepared singlets in films of different structure. Singlet fission is inhibited in the more stable polymorph due torapid excimer formation and trapping. The less stable polymorph undergoes highly efficient singlet fission with a dominant time constant of 10-30 ps and without strong thermal activation. Transient absorption measurements with varying exc
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CC - Organic chemistry
OECD FORD branch
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Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of the American Chemical Society
ISSN
0002-7863
e-ISSN
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Volume of the periodical
136
Issue of the periodical within the volume
20
Country of publishing house
US - UNITED STATES
Number of pages
11
Pages from-to
7363-7373
UT code for WoS article
000336416600031
EID of the result in the Scopus database
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