Scheme 1. (a) Schematic of the synthesis of TFPPy–ETTA–COF. (b) Physical isolation of sulfur (S8 ring) in the COF. (c) Covalent engineering of polysulfide chains on the pore walls. (d) Graphic of S8 (yellow) loaded in S@TFPPy–ETTA–COF. (e) Graphic of polysulfide chains locked in polysulfide@TFPPy–ETTA–COF (one-layer polysulfide is shown for clarity; yellow; polysulfide).
