Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 15, Pages 12124-12134Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b11628
Keywords
phosphorescence; tellurium; inorganic heterocycles; aggregation enhanced emission; color tuning
Funding
- Natural Sciences and Engineering Research Council (NSERC) of Canada
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) of Brazil [400179/2014-8]
- Canada Foundation for Innovation
- Killam Trust
- European Union [691684]
- Alexander von Humboldt Foundation for an Experienced Researcher Fellowship
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Previous research in our group showed that tellurophenes with pinacolboronate (BPin) units at the 2- and/or 5-positions displayed efficient phosphorescence in the solid state, both in the presence of oxygen and water. In this current study, we show that luminescence from a tellurophene is possible when various aryl-based substituents are present, thus greatly expanding the family of known (and potentially accessible) Te-based phosphors. Moreover, for the green phosphorescent perborylated tellurium heterocycle, 2,3,4,5-TeC(4)BPin(4) (4BTe), oxygen-mediated quenching of phosphorescence is an important contributor to the lack of emission in solution (when exposed to air); thus, this system displays aggregation-enhanced emission (AEE). These discoveries should facilitate the future design of color tunable tellurium-based luminogens.
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