Room temperature synthesis of covalent-organic framework films through vapor-assisted conversion

Dana D Medina; Julian M Rotter; Yinghong Hu; Mirjam Dogru; Veronika Werner; Florian Auras; John T Markiewicz; Paul Knochel; Thomas Bein

doi:10.1021/ja510895m

Room temperature synthesis of covalent-organic framework films through vapor-assisted conversion

J Am Chem Soc. 2015 Jan 28;137(3):1016-9. doi: 10.1021/ja510895m. Epub 2015 Jan 20.

Authors

Dana D Medina¹, Julian M Rotter, Yinghong Hu, Mirjam Dogru, Veronika Werner, Florian Auras, John T Markiewicz, Paul Knochel, Thomas Bein

Affiliation

¹ Department 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.