Oligothiophene-Bridged Conjugated Covalent Organic Frameworks
| Autor: | Fabian C. Hanusch, Stephan Reuter, Derya Bessinger, Florian Auras, Niklas Keller, Thomas Bein, Mona Calik, Laura Ascherl |
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| Rok vydání: | 2017 |
| Předmět: |
Organic electronics
Chemistry Imine Nanotechnology 02 engineering and technology General Chemistry Conjugated system 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry Article Catalysis 0104 chemical sciences chemistry.chemical_compound Colloid and Surface Chemistry Covalent bond 0210 nano-technology Electronic properties |
| Zdroj: | Journal of the American Chemical Society |
| ISSN: | 1520-5126 0002-7863 |
| DOI: | 10.1021/jacs.7b01631 |
| Popis: | Two-dimensional covalent organic frameworks (2D-COFs) are crystalline, porous materials comprising aligned columns of π-stacked building blocks. With a view toward the application of these materials in organic electronics and optoelectronics, the construction of oligothiophene-based COFs would be highly desirable. The realization of such materials, however, has remained a challenge, in particular with respect to laterally conjugated imine-linked COFs. We have developed a new building block design employing an asymmetric modification on an otherwise symmetric backbone that allows us to construct a series of highly crystalline quaterthiophene-derived COFs with tunable electronic properties. Studying the optical response of these materials, we have observed for the first time the formation of a charge transfer state between the COF subunits across the imine bond. We believe that our new building block design provides a general strategy for the construction of well-ordered COFs from various extended building blocks, thus greatly expanding the range of applicable molecules. |
| Databáze: | OpenAIRE |
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