| In this paper, four unreported organic-inorganic hybrid compounds based on theα-metatungstate clusters [H2W12O40]6- have been conventionally synthesized in aqueoussolution by utilizing α-metatungstate clusters [H2W12O40]6, Ln（NO3）3·6H2O（Ln=Ce, Pr, Nd,Sm） and2-pyrazinecarboxylic acid as reaction materials and adjusting reaction conditions.The four compounds have been structurally characterized by elemental analyses, IR spectra,TG analyses, and single crystal X-ray diffraction. Additionally, solid-state luminescenceproperties of the compounds1,2,4and2-pyrazinecarboxylic acid （HL） have been studied atroom temperature. Luminescence analysis shows compound4possesses good luminescenceproperty.In the compounds1-4, L ligands link two kinds of Ln3+ions in a chelating-bridgingtridentate coordination mode, resulting in two sorts of infinite one-dimensional （1D） zigzagchains. Moreover, each [H2W12O40]6- cluster acting as a pentadentate ligand connects fiveLn3+ions from three zigzag chains through its five terminal oxygen atoms, forming acomplicated3D structure with a novel （32415261）（32425363）（3143536172） topology and S-typechannels.The chemical formula of the four compounds are:（NH4）2[Ce2（L）2(H2W12O40)（H2O）7]·9H2O（1）（NH4）2[Pr2（L）2(H2W12O40)（H2O）7]·12H2O（2）（NH4）2[Nd2（L）2(H2W12O40)（H2O）7]·11H2O（3）（NH4）2[Sm2（L）2(H2W12O40)（H2O）7]·10H2O（4）... |
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