Oligothiophene-Bridged Conjugated Covalent Organic Frameworks

Keller, Niklas; Bessinger, Derya; Reuter, Stephan; Calik, Mona; Ascherl, Laura; Hanusch, Fabian C.; Auras, Florian und Bein, Thomas (2017): Oligothiophene-Bridged Conjugated Covalent Organic Frameworks. In: Journal of the American Chemical Society, Bd. 139, Nr. 24: S. 8194-8199

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.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Chemie und Pharmazie > Department Chemie
• Fakultätsübergreifende Einrichtungen: Center for NanoScience (CENS)
• Themengebiete: 500 Naturwissenschaften und Mathematik > 540 Chemie ; 500 Naturwissenschaften und Mathematik > 500 Naturwissenschaften
• ISSN: 0002-7863
• Sprache: Englisch