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Molecules, Vol. 23, Pages 558: Calixarenes as High Temperature Matrices for Thermally Activated Delayed Fluorescence: C70 in Dihomooxacalix[4]arene

Molecules, Vol. 23, Pages 558: Calixarenes as High Temperature Matrices for Thermally Activated Delayed Fluorescence: C70 in Dihomooxacalix[4]arene

Molecules doi: 10.3390/molecules23030558

Authors: Tiago Palmeira Alexandre Miranda Paula Marcos Mário Berberan-Santos

Thermally activated delayed fluorescence (TADF) of 12C70 and 13C70 was observed up to 140 °C in a p-tert-butyldihomooxacalix[4]arene solid matrix, a temperature range significantly higher than that of previous TADF quantitative studies. An effective singlet–triplet energy gap of 29 kJ/mol and triplet formation quantum yields of 0.97 and 0.99 were measured for 12C70 and 13C70, respectively. The photophysical properties of the two fullerenes in this new matrix are comparable to those obtained in polystyrene at a lower temperature range. Calixarenes are proposed to be suitable matrices for high temperature TADF studies and applications.

Authors:   Palmeira, Tiago ; Miranda, Alexandre S.; Marcos, Paula M.; Berberan-Santos, Mário N.
Journal:   Molecules
Volume:   23
edition:   3
Year:   2018
Pages:   558
DOI:   10.3390/molecules23030558
Publication date:   02-Mar-2018
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