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Intramolecular Triplet-Triplet Annihilation Upconversion in 9,10-Diphenylanthracene Oligomers and Dendrimers

Damir Dzebo (Institutionen för kemi och kemiteknik, Fysikalisk kemi) ; Karl Börjesson ; Victor Gray (Institutionen för kemi och kemiteknik, Polymerteknologi) ; Kasper Moth-Poulsen (Institutionen för kemi och kemiteknik, Polymerteknologi) ; Bo Albinsson (Institutionen för kemi och kemiteknik, Fysikalisk kemi)
Journal of Physical Chemistry C (1932-7447). Vol. 120 (2016), 41, p. 23397-23406.
[Artikel, refereegranskad vetenskaplig]

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.



Denna post skapades 2016-11-22. Senast ändrad 2016-11-25.
CPL Pubid: 245513

 

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