Two new organic-inorganic hybrid compounds induced by <i>γ</i>-[Mo<sub>8</sub>O<sub>26</sub>]<sup>4−</sup> and [PMo<sub>12</sub>O<sub>40</sub>]<sup>3−</sup>

<p>Two new organic–inorganic hybrid compounds, [Cu<sup>II</sup>(btb)<sub>1.5</sub>(<i>γ</i>-Mo<sub>8</sub>O<sub>26</sub>)<sub>0.5</sub>(H<sub>2</sub>O)]·2H<sub>2</sub>O (<b>1</b>) and [Cu<sup>II</sup><sub>2</sub>(btb)<sub>4</sub>(PMo<sup>V</sup>Mo<sup>VI</sup><sub>11</sub>O<sub>40</sub>)]·2H<sub>2</sub>O (<b>2</b>) (btb = 4-butyl-1,4-bis(1,2,4-triazole), have been hydrothermally synthesized and characterized by single-crystal X-ray diffraction analysis, IR spectra and elemental analyses. In <b>1</b>, there exists a ladder-like metal-organic chain with the bidentate [<i>γ</i>-Mo<sub>8</sub>O<sub>26</sub>]<sup>4−</sup> anions inserting into the grids. Adjacent chains share the same Cu-btb lines of the ladder to form a 2-D layer. Compound <b>2</b> also has a ladder-like metal-organic chain. The tetradentate [PMo<sub>12</sub>O<sub>40</sub>]<sup>3−</sup> anions embed in the grids. The same Cu-btb line is shared by adjacent chains to build a 2-D layer. The btb ligands link adjacent layers to form a 3-D framework. Moreover, we also have investigated the electrochemical and photocatalytic properties of <b>1</b> and <b>2</b>.</p>