Boron Dipyrromethene Chromophores: Next Generation Triplet Acceptors/Annihilators for Low Power Upconversion Schemes

In the present study, the red-light absorbing platinum(II) tetraphenyltetrabenzoporphyrin (PtTPBP) was used as a triplet sensitizer in conjunction with two distinct iodophenyl-bearing BODIPY derivatives independently serving as triplet acceptors/annihilators poised for photon upconversion based on t...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2008-12, Vol.130 (48), p.16164-16165
Main Authors: Singh-Rachford, Tanya N, Haefele, Alexandre, Ziessel, Raymond, Castellano, Felix N
Format: Article
Language:English
Subjects:
Chemical Sciences
or physical chemistry
Organic chemistry
Theoretical and
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Summary:In the present study, the red-light absorbing platinum(II) tetraphenyltetrabenzoporphyrin (PtTPBP) was used as a triplet sensitizer in conjunction with two distinct iodophenyl-bearing BODIPY derivatives independently serving as triplet acceptors/annihilators poised for photon upconversion based on triplet−triplet annihilation. In deaerated benzene solutions, extremely stable and high quantum efficiency green (ΦUC = 0.0313 ± 0.0005) and yellow (ΦUC = 0.0753 ± 0.0036) upconverted emissions were observed from selective red excitation of the PtTPBP sensitizer at 635 ± 5 nm. The current systems represent the first examples of photon upconversion where aromatic hydrocarbons do not serve the role of triplet acceptor/annihilator. Notably, the nature of the current chromophore compositions permitted highly reproducible upconversion quantum efficiency determinations while permitting the evaluation of the triplet−triplet annihilation quantum yields in both instances.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja807056a