Porous aromatic networks with amine linkers for adsorption of hydroxylated aromatic hydrocarbons: Porous aromatic networks with amine linkers for adsorption of hydroxylated aromatic hydrocarbons

The porous covalent organic polymers (COPs) are valuable materials in various fields such as gas storage, adsorption or separation, luminescent detection, catalysis, and sensors. Two thermally stable COPs with aromatic skeleton linked by amine groups were prepared by Buchwald-Hartwig protocol. The COPs with respective Brunauer-Emmett-Teller surface area of 204 and 178 m(2)/g were employed for adsorption of hydroxylated aromatic hydrocarbons (HAHs) due to expected strong pi-pi stacking and hydrogen-bond interactions between COPs and HAH. In adsorption of phenol from water, COP2 showed far better capacity than COP1, silica, basic alumina, and macroporous resin (D101). In adsorption of 2-naphthol COP1 and COP2 displayed similar capacity, being 2.8, 5.4, and 7.4 times high as those for macroporous resin (D101), basic alumina, and silica, respectively. COP1 and COP2 are useful for efficient separation of 2-naphthol or other HAHs from waste water. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 46919.