Metal-Ion Tuning in Triple-Stranded Helicate-Based Metallosupramolecules |
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Authors: | Van Cam Thi Le Dr Hien Duy Mai Dr Philjae Kang Prof Hyojong Yoo |
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Institution: | Department of Chemistry, Hallym University, Chuncheon, Gangwon-do, 24252 Republic of Korea |
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Abstract: | Effective incorporation of multiple types of ligands in a given coordination structure provides structural complexity and functional diversity to the resultant coordination-driven assembly. One of the most widely used synthetic approaches is the utilization of the molecular symmetry principle to combine multiple ligands and specific metallic centers in a preferred manner. The variation of metal ions can be helpful to understand the importance of symmetry for the generation of structurally hierarchical supramolecular platforms. 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) . The effect of metal variation on the formation of supramolecular helicates and their solid-state crystal packing are discussed. 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 in the same manner to form isostructural supramolecular helicates. |
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Keywords: | coordination-driven assembly helicates heteroleptic ligands molecular symmetry supramolecular chemistry |
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