Two 3D Coordination Polymers with New Topology Based on Mixed Ligands: Synthesis, Structure, and Photoluminescence Properties

Employing tetracarboxylate and imidazole mixed ligands to react with different transition meat salts afford two new 3D coordination polymers, {[Zn 2 (BPTC)(BBI) 2 ]·(H 2 O) 3 ·DMSO} n ( 1 ) and {[Cd 2 (BPTC)(BBI) 2 ]·H 2 O} n ( 2 ) (H 4 BPTC = biphenyl-3,3′,4,4′-tetracarboxylic acid, BBI = 1,1′-(1,4-butanediyl)bis(imidazole)). Both these two coordination polymers are 4-connected network topologies. Compound 1 features a unprecedented 3-nodal (4,4,4)-connected network topology with the point symbol {6 4 ·8 2 }, and 2 displays a (4,4)-connected binodal network bearing new topology with the point symbol of {7 2 ·8 4 }2{7 3 ·8 3 }. Additionally, thermal stability and photoluminescence properties of 1 and 2 were investigated.