Two Thin Film Polymorphs of the Singlet Fission Compound 1,3-Diphenylisobenzofuran

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388963%3A_____%2F14%3A00429925" target="_blank" >RIV/61388963:_____/14:00429925 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1021/jp502122d" target="_blank" >http://dx.doi.org/10.1021/jp502122d</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/jp502122d" target="_blank" >10.1021/jp502122d</a>

Result language
angličtina
Original language name
Two Thin Film Polymorphs of the Singlet Fission Compound 1,3-Diphenylisobenzofuran
Original language description
Polycrystalline thin films of 1,3-diphenylisobenzofuran (1) with a morphology referred to here as alpha exhibit highly efficient singlet fission, producing two triplet states for every absorbed photon at 77 K, and about 1.4 triplet states per absorbed photon at room temperature. However, the triplet yield depends strongly on the specific crystalline form of 1, and for the morphology referred to as beta the triplet yields are roughly an order of magnitude smaller. In this study, alpha, beta, and mixed alpha/beta films of 1 are prepared by thermal evaporation and solution drop-casting, and the structural and photophysical differences that may account for the very different triplet quantum yields are explored. The crystallites of 1 in thin films have beenidentified with two bulk crystal polymorphs grown from solution and structurally characterized. Analysis of absorption spectra of the films reveals a 600 cm(-1) blue shift in the onset and a unique spectral profile for the form alpha cry
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CF - Physical chemistry and theoretical chemistry
OECD FORD branch
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Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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