Polymer based triplet-triplet annihilation upconversion (TTA-UC) emitters with tunable inter-chromophore distances were investigated. 9-anthrylmethyl methacrylate was chosen as the chromophore monomer and methyl methacrylate as chain extender. Poly(AnMMA-<i>co</i>-MMA) with different percentages of AnMMA monomer ratio were synthesized using reversible addition-fragmentation chain transfer (RAFT) polymerization. Platinum octaethylporphyrin was used as sensitizer to form TTA-UC systems. It is observed that TTA-UC intensity first increases with increasing AnMMA percentage in the polymers then decreases, and ultimately disappears even though increasing the AnMMA percentage. The results reveal the key aspects affecting TTA-UC in polymeric system, and hopefully give implication to the design of polymer-based TTA-UC systems.

Triplet-triplet annihilation upconversion from rationally designed polymeric emitters with tunable interchromophore distances

249th National Meeting (2015)

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