Assembly of Polyoxometalate-Based Hybrids with Different Helical Channels upon Subtle Ligand Variation

作者：Li Meng Ting; Sha Jing Quan^*; Zong Xi Ming; Sun Jing Wen; Yan Peng Fei; Li Liang; Yang Xiao Ning

来源：Crystal Growth & Design, 2014, 14(6): 2794-2802.

DOI：10.1021/cg500045q

Self-assembly of multiple components into well-defined and predictable structures remains one of the foremost challenges in chemistry. Here, upon subtle ligand variation, we reported on the assembly of three new polyoxometalate-based organic inorganic hybrid compounds with different helical channel, [Ag-3(H(2)pyttz-I)(2)] [PMo12O40] (1), [Ag-6(H(2)pyttz-II)(4)] [CoW12O40]center dot 2H(2)O (2), and [Ag-7(Hpyttz-II)(3)(H(2)pyttz-II)][GeW12O40]center dot 7H(2)O (3) (H(2)pyttz-I/II = 4-/ 3-pyrid-5-(1H-1,2,4-triazol-3-yl)-1,2,4-triazolyl, POM = polyoxometalates). X-ray diffraction analysis shows that compound 1 is constructed by "butterfly-like" Ag-5(H(2)pyttz-I)(2) subunits and POMs clusters, which are assembled into close helical channels impregnated with the components selves. Both compounds 2 and 3 are constructed by "paddle-wheel like" Ag-4(H(2)pyttz-II)(4) motifs and POMs clusters, which bring into being the larger helical channels (10.5% and 12.5% of the cell volume, respectively). Note that the only difference in compounds 2 and 3 is that the former contains 1D metal-organic chain structure, and the latter contains 2D metal-organic layer structure. In addition, the photocatalytic degradation of RhB by these compounds was also investigated.

• 出版日期2014-6
• 单位黑龙江大学; 佳木斯大学