Proceedings of nanoGe Fall Meeting 2018 (NFM18)
DOI: https://doi.org/10.29363/nanoge.nfm.2018.080
Publication date: 6th July 2018
We have developed new families of highly ordered two dimensional covalent organic framework (2D-COF) materials. The materials have a hexagonal aromatic backbone with nanopores with controlled sizes that can be functionalized with any number of functional groups. We make them in high yields from condensation reactions from easy to obtain starting materials that in some cases produce very sharp x-ray diffraction patterns as well as showing triangular shaped crystallites with sharp diffraction spots in the TEM indicating a high degree of order. Single metal binding sites can also be designed within the framework structures. We have initially concentrated on putting charged functional groups in the pores to use as membrane materials and have demonstrated very specific ion charge and size selectivity with membranes made from these 2D-COFs. We have also produced 2D-COF materials that have less order but selectively absorb and release hydrogen at near room temperature. Other applications such as size exclusion filtration will also be shown.
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