Layered hybrid network based on preformed [Mo3S4(HNTA)3]2− building blocks and La3+ cations

The cluster [Mo3S4(HNTA)3]2− reacts in acidic solution with LaCl3 to form a new hybrid layered compound La0.75Cl0.25[Mo3S4(HNTA)3]·18H2O (1) as crystals. Compound 1 has been structurally characterized by XRD, FTIR, TGA and elemental analysis. 1 crystallizes in the chiral P6(3) space group with a = 19.319(4) Å, c = 31.094(14) Å, V = 10,050(5) Å3 and Z = 8. The asymmetric unit contains four independent [Mo3S4(HNTA)3]2− anions. Three of them are directly connected to the La3+ cations through the carbonyl groups belonging to the coordinated carboxylates to give a 2D arrangement. The stacking of the 2D arrangements gives rise to the 3D network through hydrogen bonds between water molecules and the remaining hanging protonated carboxylate ligands. The resulting hexagonal network draws large channels (about 12 Å in diameter), filled by the fourth [Mo3S4(HNTA)3]2− unit, which appears uncoordinated and then could be viewed as a guest component.

Graphical abstractThe cluster [Mo3S4(HNTA)3]2− reacts in acidic solution with LaCl3 to form a new hybrid layered compound La0.75Cl0.25[Mo3S4(HNTA)3]·18H2O (1) as crystals.Figure optionsDownload full-size imageDownload as PowerPoint slide