Wednesday, 28 January, 2015
Room Temperature Synthesis of CovalentOrganic Framework Films through Vapor-Assisted Conversion
D. Medina, J. Rotter, Y. Hu, M. Dogru, V. Werner, F. Auras, J. Markiewicz, P. Knochel, and T. Bein -
J. Am. Chem. Soc., Vol. 137 (3), pp 10161019 (2015)
We describe the facile synthesis of several two-dimensional covalentorganic frameworks (2D COFs) as films by vapor-assisted conversion at room temperature. High-quality films of benzodithiophene-containing BDT-COF and COF-5 with tunable thickness were synthesized under different conditions on various substrates. BDT-COF films of several micrometer thickness exhibit mesoporosity as well as textural porosity, whereas thinner BDT-COF films materialize as a cohesive dense layer. In addition, we studied the formation of COF-5 films with different solvent mixture compositions serving as vapor source. Room temperature vapor-assisted conversion is an excellent method to form COF films of fragile precursors and on sensitive substrates.