Direct on-surface patterning of a crystalline laminar covalent organic framework synthesized at room temperature

We report herein an efficient, fast, and simple synthesis of an imine-based covalent organic framework (COF) at room temperature (hereafter, RT-COF-1). RT-COF-1 shows a layered hexagonal structure exhibiting channels, is robust, and is porous to N2 and CO2. The roomtemperature synthesis has enabled us to fabricate and position low-cost micro- and submicropatterns of RT-COF-1 on several surfaces, including solid SiO2 substrates and flexible acetate paper, by using lithographically controlled wetting and conventional ink-jet printing.We thank the MINECO (Spain) for financial support through projects MAT2013-46753-C2-1-P, MAT2012-30994, and MAT2014-52305-P). A.P. acknowledges UCM for a predoctoral fellowship.Peer Reviewe