fig7

Figure 7. (A) Cross-section SEM image of OCF-36 composed of POC-14 and PIM^[77]. Copyright 2013, Wiley-VCH; (B) Cross-section SEM image of OCF-38 composed of the modified Noria cage and the polyimide 6FDA-DAM^[79]. Copyright 2017, Elsevier. SEM: Scanning electron microscopy; OCF: organic cage-based framework; POC: porous organic cage; PIM: polymers of intrinsic microporosity; 6FDA-DAM: 4,4’-(hexafluoroisopropylidene)diphthalic anhydride-2,4,6-trimethyl-benzene-1,3-diamine.