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Issue 26, 2018
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Plasmon-enhanced triplet–triplet annihilation upconversion of post-modified polymeric acceptors

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Abstract

We report the localized surface plasmon resonance (LSPR)-enhanced triplet–triplet annihilation upconversion (TTA-UC) of polymeric acceptors containing high percentages of acceptor units. A poly[(methyl methacrylate)-co-(glycidyl methacrylate)] copolymer series with increasing glycidyl methacrylate ratio was prepared using reversible addition–fragmentation chain transfer (RAFT) polymerization. After post-modification of the glycidyl group with anthracene, the acceptor unit, a series of poly[(methyl methacrylate)-co-(2-hydroxypropyl-9-anthroate methacrylate)] (polyACA) was produced with different numbers of acceptor units. These polymeric acceptors were grafted to silver nanoparticles in order to enhance the TTA-UC intensity in the polymers with higher percentages of acceptor units, where concentration quenching usually dominates. With the assistance of the silver nanoparticle LSPR, TTA-UC intensity was enhanced from the polymeric acceptor nanocomposites using platinum octaethylporphyrin as the sensitizer to form the TTA-UC systems. This method is anticipated to improve TTA-UC in the solid-state, where higher percentages of acceptor units are required, but usually cause chromophore concentration quenching, reducing TTA-UC efficiency.

Graphical abstract: Plasmon-enhanced triplet–triplet annihilation upconversion of post-modified polymeric acceptors

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Publication details

The article was received on 21 Jan 2018, accepted on 08 Mar 2018 and first published on 08 Mar 2018


Article type: Paper
DOI: 10.1039/C8DT00269J
Citation: Dalton Trans., 2018,47, 8638-8645
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    Plasmon-enhanced triplet–triplet annihilation upconversion of post-modified polymeric acceptors

    E. G. Westbrook and P. Zhang, Dalton Trans., 2018, 47, 8638
    DOI: 10.1039/C8DT00269J

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