Abstract
Two-dimensional covalent organic frameworks (2D-COFs) are crystalline, porous materials comprising aligned columns of pi-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.
| Item Type: | Journal article |
|---|---|
| Faculties: | Chemistry and Pharmacy > Department of Chemistry |
| Research Centers: | Center for NanoScience (CENS) |
| Subjects: | 500 Science > 540 Chemistry 500 Science > 500 Science |
| ISSN: | 0002-7863 |
| Language: | English |
| Item ID: | 54184 |
| Date Deposited: | 14. Jun 2018 09:55 |
| Last Modified: | 04. Nov 2020 13:33 |
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