The interplay of thermally activated delayed fluorescence (TADF) and room temperature organic phosphorescence in sterically-constrained donor-acceptor charge-transfer molecules

A series of phenothiazine-dibenzothiophene-S, S-dioxide charge-transfer molecules have been synthesized. Increasing steric restriction around the donor-acceptor bond significantly alters contributions from TADF and phosphorescence. Bulky substituents on the 1-(and 9) position(s) of the phenothiazine...

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Published inChemical communications (Cambridge, England) Vol. 52; no. 12; pp. 2612 - 2615
Main Authors Ward, Jonathan S., Nobuyasu, Roberto S., Batsanov, Andrei S., Data, Przemyslaw, Monkman, Andrew P., Dias, Fernando B., Bryce, Martin R.
Format Journal Article
LanguageEnglish
Published CAMBRIDGE Royal Soc Chemistry 11.02.2016
Subjects
Activated
Ambient temperature
Bonding
Chemistry
Chemistry, Multidisciplinary
Constrictions
Fluorescence
Phenothiazines
Phosphorescence
Physical Sciences
Science & Technology
Solid state
LIGHT-EMITTING-DIODES
DESIGN
OLEDS
EMISSION
EFFICIENCY
ELECTROLUMINESCENCE
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Summary:A series of phenothiazine-dibenzothiophene-S, S-dioxide charge-transfer molecules have been synthesized. Increasing steric restriction around the donor-acceptor bond significantly alters contributions from TADF and phosphorescence. Bulky substituents on the 1-(and 9) position(s) of the phenothiazine result in no TADF in the solid state; instead strong phosphorescence is observed at ambient temperature.
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ISSN:1359-7345
1364-548X
DOI:10.1039/c5cc09645f