Recent Advances as Materials of Functional Metal-Organic Frameworks

Figure 9

(a) Octahedral cage in PCN-20. (b) Cuboctahedral cage with alignment of the unsaturated metal center (UMCs) in PCN-20. (c) Cuboctahedral cage with open metal sites aligned orthogonally in PCN-20. (d) Square channels of PCN-20.

(a)

(b)

(c)

(d)