摘要
By changing the solvents, three polyoxometalate(POM)-based supramolecular hybrids, [Co2 L3][SiW(12)O(40)]·17 H2 O(1),[Co2 L2(H2 O)4][SiW(12)O(40)].2 EtOH·2 H2 O(2) and [Co2 L3][SiW(12)O(40)]·9 DMA·6 H2 O(3), have been synthesized under hydrothermal or solvothermal conditions. All three hybrids show various supramolecular structures, which contain two kinds of different metal-organic motifs. A kind of metal-organic cationic cage [Co2 L3]^4+ is formed in the presence of H2 O for 1, DMA/H2 O for 3, and a metalorganic cationic circle [Co2 L2]^(4+) is constructed in the presence of EtOH/H2 O for 2. That is to say, the solvents show a key role in tuning the architectures of metal-organic fragments and the final POM-based supramolecular structures. The adsorption properties of 1-3 for different organic dyes have also been investigated.
By changing the solvents, three polyoxometalate(POM)-based supramolecular hybrids, [Co2 L3][SiW(12)O(40)]·17 H2 O(1),[Co2 L2(H2 O)4][SiW(12)O(40)].2 EtOH·2 H2 O(2) and [Co2 L3][SiW(12)O(40)]·9 DMA·6 H2 O(3), have been synthesized under hydrothermal or solvothermal conditions. All three hybrids show various supramolecular structures, which contain two kinds of different metal-organic motifs. A kind of metal-organic cationic cage [Co2 L3]^4+ is formed in the presence of H2 O for 1, DMA/H2 O for 3, and a metalorganic cationic circle [Co2 L2]^(4+) is constructed in the presence of EtOH/H2 O for 2. That is to say, the solvents show a key role in tuning the architectures of metal-organic fragments and the final POM-based supramolecular structures. The adsorption properties of 1-3 for different organic dyes have also been investigated.
基金
financially supported by the National Natural Science Foundation of China(Nos. 21671025, 21471021, 21501013,21401010)
Program for Distinguished Professor of Liaoning Province(No. 2015399)