| 초록 |
Combination of mixed ligands in a given coordination structure leads to coordination-driven assembly with improved structural complexity and functional diversity. Molecular symmetry principle to assemble multiple ligands and specific metallic centers in a preferred manner is the key. Herein, we describe the synthesis and characterization of isostructural supramolecular helicates, [M8(PDA)6(AIP)3(DMF)6-x(H2O)x] (M=Ni (1), Co (2), and Mn (3); PDA=2,6-pyridinedicarboxylate; AIP=5-aminoisophthalate; x=0 for 1, and x=4 for 2 and 3). Despite the disparity in the ionic radii and distinct coordination-geometry preferences of Co2+, Ni2+, and Mn2+, all metal centers engaged in the assembly with the heteroleptic ligands to form isostructural supramolecular helicates. In addition, 1, 2, and 3 can be employed as conceptual supramolecular modules for the construction of higher-order polymeric structures via the coordination with extra metal ions. |
