Abstract
AbstractA new polyoxovanadate‐based metal−organic octahedron (VMOP‐26) was synthesized from vanadium acetylacetonate and 1,4‐naphthalenedicarboxylic acid (1,4‐H2NDC) under solvothermal condition and characterized by single crystal X‐ray diffraction, powder X‐ray diffraction, infrared spectroscopy and thermogravimetric analysis. The structure of VMOP‐26 was composed of six {V5O9Cl} clusters and twelve 1,4‐NDC ligands with regular octahedral geometry in which the polyoxovanadate clusters act as vertices and 1,4‐NDC as edges. Each octahedron was surrounded by twelve adjacent octahedra with edge‐to‐edge connection modes. The absorption ability toward the dye molecules of VMOP‐26 was investigated because VMOP‐26 was an anionic cage. The results exhibit that only cationic dyes (Methylene blue (MB+), crystal violet (CV+), Rhodamine B (RhB+)) can be absorbed into the crystal lattice of VMOP‐26, which indicates that the cationic dye absorption is an ion‐exchange process. Besides, the fluorescent property of VMOP‐26 was also investigated.
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