Room temperature synthesis of covalent-organic framework films through vapor-assisted conversion
Dana D Medina1, Julian M Rotter, Yinghong Hu
1Department of Chemistry and Center for NanoScience (CeNS), University of Munich (LMU) , Butenandtstrasse 5-13 (E), 81377 Munich, Germany.
Abstract:
We describe the facile synthesis of several two-dimensional covalent-organic 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.
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