Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 120, Issue 41, Pages 23397-23406Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.6b07920
Keywords
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Funding
- Swedish Energy Agency
- Swedish research council
- Swedish Strategic Research council
- Knut and Alice Wallenberg foundation
- Chalmers Material and Energy AoA
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An important challenge when developing materials for triplet triplet annihilation upconversion (TTA-UC) is achieving efficient and well-functioning solid-state systems. We here explore the effect of intramolecular TTA in oligomers and dendrimers based on the 9,10-diphenylanthracene (DPA) chromophore. The macromolecules are sensitized using palladium porphyrin, both in solution and in solid poly(methyl methacrylate) (PMMA), demonstrating a positive effect on overall upconversion in the solid state correlating with the well-controlled size of the DPA constructs. The UC kinetics is modeled and fit to steady-state and time-resolved emission data to give further insight into the intramolecular excited-state migration and annihilation in the macromolecular annihilator systems.
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