Poly-p-hydroquinone Ethers: Isoenergetic Molecular Wires with Length-Invariant Oxidation Potentials and Cation Radical Excitation Energies
| Autor: | Marat R. Talipov, Vincent J. Chebny, Rajendra Rathore, Maxim V. Ivanov |
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| Rok vydání: | 2017 |
| Předmět: |
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Molecular Free Radicals Polymers 02 engineering and technology Crystallography X-Ray 010402 general chemistry Photochemistry 01 natural sciences Biochemistry Redox Catalysis Electron Transport Molecular wire chemistry.chemical_compound Delocalized electron Electron transfer Colloid and Surface Chemistry Cations Hydroquinone Chemistry General Chemistry 021001 nanoscience & nanotechnology Electron transport chain Hydroquinones 0104 chemical sciences Coupling (electronics) Chemical physics Quantum Theory 0210 nano-technology Oxidation-Reduction Excitation Ethers |
| Zdroj: | Journal of the American Chemical Society. 139:4334-4337 |
| ISSN: | 1520-5126 0002-7863 |
| DOI: | 10.1021/jacs.7b01226 |
| Popis: | Typical poly-p-phenylene wires are characterized by strong interchromophoric electronic coupling with redox and optical properties being highly length-dependent. Herein we show that an incorporation of a pair of para-methoxy groups at each p-phenylene unit in poly-p-phenylene wires (i.e., PHEn) changes the nodal structure of HOMO that leads to length-invariant oxidation potentials and cation radical excitation energies. As such, PHEn represents a unique class of isoenergetic wires where hole delocalization mainly occurs via dynamic hopping and thus may serve as an efficient medium for long-range charge transfer. Availability of these wires will allow demonstration of long-range electron transfer via incoherent hopping using donor-bridge-acceptor systems with isoenergetic PHEn-based wires as bridges. |
| Databáze: | OpenAIRE |
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