“…Rational design and assembly of polyoxometalate (POM)based metal-organic complexes (MOCs) are of overwhelming interest due to their diverse and fantastic structures, as well as their multifunctional applications in traditional and emerging fields of medicine, electrochemistry, catalysis, magnetism, etc. [1][2][3][4] Of the multitudinous POM family, octamolybdate has exhibited ten isomers so far, namely, α-, β-, γ-, δ-, ε-, ζ-, ξ-, η-, θand ι-isomer, [5][6][7][8][9][10] which can provide plentiful terminal or bridging oxygen atoms to link with transition metal cations and organic ligands during the reaction process, [11][12][13] indicating that the octamolybdates could be taken as structural units to prepare POM-based MOCs with diverse structures. [14][15][16][17] Currently, plenty of N-containing organic ligands have been considered as sensible candidates in establishing various POM-based MOCs, because of their various coordination modes.…”