“…Smaller metal nodes tend to form non-porous 2D and 3D coordination polymers. [23][24][25][26] However, some RE-MOFs with smaller metal nodes also exhibit porous frameworks such as RE-MOF-76 [RE(btc), btc = benzene-1,3,5-tricarboxylat] and MIL-103 [RE(btb)(H 2 O), btb = 1,3,5-benzenetrisbenzoate]. [27][28][29] The introduction of modulators including organofluorine molecules has resulted in hexanuclear clusters, similar to the hexacluster nodes in Zr-UiO-66, [Zr 6 O 4 (OH) 4 (bdc) 6 , bdc = benzene-1,4-dicarboxylat].…”