TY  - JOUR
A1  - Gole, Bappaditya
A1  - Stepanenko, Vladimir
A1  - Rager, Sabrina
A1  - Grüne, Matthias
A1  - Medina, Dana D.
A1  - Bein, Thomas
A1  - Würthner, Frank
A1  - Beuerle, Florian
T1  - Microtubular Self-Assembly of Covalent Organic Frameworks
T2  - Angewandte Chemie International Edition
N2  - Despite significant progress in the synthesis of covalent organic frameworks (COFs), reports on the precise construction of template-free nano- and microstructures of such materials have been rare. In the quest for dye-containing porous materials, a novel conjugated framework DPP-TAPP-COF with an enhanced absorption capability up to λ=800 nm has been synthesized by utilizing reversible imine condensations between 5,10,15,20-tetrakis(4-aminophenyl)porphyrin (TAPP) and a diketopyrrolopyrrole (DPP) dialdehyde derivative. Surprisingly, the obtained COF exhibited spontaneous aggregation into hollow microtubular assemblies with outer and inner tube diameters of around 300 and 90 nm, respectively. A detailed mechanistic investigation revealed the time-dependent transformation of initial sheet-like agglomerates into the tubular microstructures.
KW  - covalent organic frameworks
KW  - diketopyrrolopyrroles
KW  - imines
KW  - microtubes
KW  - porphyrins
Y1  - 2018
UR  - https://opus.bibliothek.uni-wuerzburg.de/opus4-wuerzburg/frontdoor/index/index/docId/22737
UR  - https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-227373
VL  - 57
ER  -