Singlet Fission in Core–Shell Micelles of End-Functionalized Polymers
| Autor: | Emily L. Kynaston, Andrew J. Tilley, Ryan D. Pensack, Gregory D. Scholes, Dwight S. Seferos |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
General Chemical Engineering Exciton 02 engineering and technology 010402 general chemistry Photochemistry 01 natural sciences Micelle Pentacene Condensed Matter::Materials Science chemistry.chemical_compound Dynamic light scattering Physics::Atomic and Molecular Clusters Materials Chemistry Physics::Chemical Physics chemistry.chemical_classification General Chemistry Polymer Chromophore 021001 nanoscience & nanotechnology 0104 chemical sciences Condensed Matter::Soft Condensed Matter chemistry Singlet fission 0210 nano-technology Ethylene glycol |
| Zdroj: | Chemistry of Materials. 30:4409-4421 |
| ISSN: | 1520-5002 0897-4756 |
| Popis: | Singlet fission is the process in aggregates of molecular semiconductors where the initial product of light absorption (a singlet exciton) is converted into two correlated spin-triplet excitons. While most studies of singlet fission are conducted on assemblies of small molecule singlet fission chromophores, polymer self-assembly has yet to be explored as a means of creating nanostructures conducive for singlet fission. In this work, we use solution self-assembly of mono- and difunctionalized polymers to create core–shell micelles that display efficient singlet fission. The polymers are synthesized by copper(I)-catalyzed “click” chemistry between a 6,13-bis(triisopropylsilylethynyl)pentacene (TIPS-Pn) alkyne precursor and the corresponding azide-terminated poly(ethylene glycol) (PEG) polymer. Spontaneous solution self-assembly creates starlike and flowerlike core–shell micelles that are characterized by dynamic light scattering (DLS) and transmission electron microscopy (TEM) experiments. Ultrafast transie... |
| Databáze: | OpenAIRE |
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