[2] [2] Pope M T, Muller A. Polyoxometalate chemistry[M].Kluwer:Dordrecht, 2001.

[3] [3] Yang Y, Wu Q, Guo Y, et al. Efficient degradation of dye pollutions on nanoporous polyoxotungstate-anatase composite undervisible-lignt irradiation[J].Molecular Catalysis A:Chemical,2005,225:203-212.

[4] [4] Cavani F, Mezzogori R, Pigamo A, et al. Combined effects of sb-doping and of preparation via lacunary precursor for P/Mo-based, keggin-type polyoxometalates, catalyses for the selective oxidation of isobutene to methacylic acid[J].Topics in Catalysis,2003,23:119-124.

[5] [5] Antonaraki S, Androulaki E, Dimotikali D, et al. Photolytic degradation of all chlorophenols with polyoxometallates and H2O2[J].Journal of Photochemistry and Photobiology A:Chemistry,2002,148(1-3):191-197.

[6] [6] Farhadi S, Mahmoudi F, Dusek M, et al. A new inorganic-organic nanohybrid based on a copper(II) semicarbazone complex and the[PMo12O40]3-:synthesis, characterization, crystal structure and photocatalytic activity for degradation of cationic dyes[J].Polyhedron,2017,122:247-256.

[7] [7] Hill C L. Progress and challenges in polyoxometalate-based catalysis and catalytic materials chemistry [J].Journal of Molecular Catalysis A:Chemical,2007,262(1-2):2-6.

[8] [8] Wang S S, Yang G Y. Recent advances in polyoxometalate-catalyzed reactions[J].Chemical Reviews,2015,115 (11):4893-4962.

[9] [9] Pope M T, Müller A. Introduction to polyoxometalate chemistry:from topology via self-assembly to applications[M].Springer, Dordrecht,2001:1-6.

[10] [10] Li C, Lu J, Tu F, et al. Study of the first antibacterial agent pipemidic acid modifying keggin polyoxometalate[J].Inorganic Chemistry Communications,2011,14(8):1192-1195.

[11] [11] Rhule J T, Hill C L, Judd D A, et al. Polyoxometalates in medicine[J].Chemical Reviews,1998,98(1):327-358.

[12] [12] Jiao Y Q, Qin C, Sun C Y, et al. Hydrothermal synthesis and structural characterization of a new inorganic-organic hybrid compound with photocatalytic activity based on keggin-type polyanion and cadmium-1, 2, 4-triazolate units [J].Inorganic Chemistry Communications,2012,20:273-276.

[13] [13] Song B Q, Wang X L, Liang J, et al. Two hybrid materials assembled from transition metal mono-substituted Keggin polyoxoanions as photocatalysts under visible light[J].Cryst.Eng.Comm.,2014,16(39):9163-9167.

[14] [14] Yang H, Meng J, Sun X, et al. A new three-dimensional organic-inorganic hybrid constructed from keggin polyoxometalates and CuI-pyrazine coordination polymers[J].Inorganic Chemistry Communications,2014,39:43-46.

[15] [15] Zhou E L, Qin C, Wang X L, et al. Assembly of two novel 3D organic-inorganic hybrids based on Keggin-type polyoxometalates:syntheses, crystal structures and properties[J].Cryst. Eng. Comm,2016,18(34):6370-6377.

[16] [16] Brown I D, Altermatt D. Bond-valence parameters obtained from a systematic analysis of the inorganic crystal structure database[J].Acta Crystallographica Section B:Structural Science,1985,41(4):244-247.

[17] [17] Liu D S, Chen W T, Ye G M, et al. Synthesis and characterization of an inorganic-organic hybrid copper coordination polymer based on well-defined Keggin polyanions[J].Inorganica Chimica Acta,2018,477:84-88.

[18] [18] Ying J, Chen Y G, Wang X Y. A series of 0D to 3D anderson-type polyoxometalate-based compounds obtained under ambient and hydrothermal conditions[J].Cryst. Eng. Comm,2019,21(7):1168-1179.