Fig. 1: A strategy for constructing JUC-641 and JUC-642 with a nia net.

The construction strategy of hxl a, acs b and nia c topology. Molecular structures of HFPTP-R (R = H or F, d) and HAPTM e. Two 3D COFs, JUC-641 and JUC-642, constructed from the condensation reaction of HFPTP-R and HAPTM f. An extended nia net g for both COFs.