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- W2947786095 abstract "Singlet fission has emerged as a key mechanism of exciton multiplication in organic chromophores, generating two triplet excitons from a single photon. Singlet fission is typically studied in crystalline films or in isolated dimers. Here, we investigate an intermediate regime where through-space interactions mediate singlet fission and triplet pair recombination within isolated polymer chains. Specifically, we investigate how appending pentacenes to a polynorbornene backbone can lead to macromolecules that take advantage of through-space π–π interactions for fast singlet fission and rapid triplet pair dissociation. Singlet fission in these systems is affected by molecular dynamics, and triplet–triplet recombination is a geminate process where the rate of recombination scales with molecular-weight. We find that these pendent pentacene polymers yield free triplets with lifetimes that surpass those of crystalline chromophores in both solution as isolated polymers and in thin films." @default.
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- W2947786095 date "2019-05-22" @default.
- W2947786095 modified "2023-10-14" @default.
- W2947786095 title "Persistent Multiexcitons from Polymers with Pendent Pentacenes" @default.
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- W2947786095 doi "https://doi.org/10.1021/jacs.9b02241" @default.
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