Construction of Cluster Organic Frameworks with bnn Hexagonal BN Topologies.

Two sandwiched cluster organic frameworks, Eu6 (OH)2 Cu9 I6 L12 (ox)3 ⋅H2 O⋅ClO4 (FJ-23, HL=4-pyridin- 4-yl-benzonic acid, ox=oxalate) and Eu6 Cu7 I7 L12 (OAc)6 (H2 O)2 ⋅2 H2 O (FJ-24, OAc=acetate) with bnn hexagonal BN topologies have been successfully made; these frameworks were assembled by nanosized graphene-like lanthanide wheel clusters and nanoscale trigonal prism metalloligands. The cooperation of small equatorial ligands and axially trigonal prism metalloligands plays a key role in the construction of such 5-connected nets. Furthermore, the thermal stabilities and chiral characteristics were also studied.