Synthesis, Structure and Photocatalytic Properties of Two Octamolybdate-Based Inorganic-Organic Hybrid Materials
TIAN Feng, SHEN Nan, He Mingyang*
1. School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China; 2. School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
Two inorganic-organic hybrid materials based on β-[Mo8O26]4−, namely{[Ni(b-Mo8O26)(H2O)4] (H2Fbix) 2H2On (1),{[Co(b-Mo8O26)(H2O)4](H2Fbix)2H2O}n (2)(Fbix = 2,3,5,6-tetrafluoro-1,4-bis(imidazol-1-ylmethyl)benzene)) were hydrothermallysynthesized and structurally characterized by single crystal X-ray diffraction, power X-ray diffraction, infrared spectroscopy, thermogravimetric analysis and elemental analysis. Single crystal X-ray analysisreveals that 1 and 2 are isostructural. Take 1 as an example, each six-coordinated NiII ion is surrounded by two β-[Mo8O26]4− units and four water molecules,forming an inorganic anionic linear chain. Protonated H2Fbix ligands act as guest and balance the chargeof anionic framework. The inorganic chain [Ni(b-Mo8O26)(H2O)4]n2n–, H2Fbix ligand and water guest molecules were further connected by hydrogen bonds to generated the final 3D structure. Both compounds1 and 2 can serve as heterogeneous catalysts and show good photocatalytic activity for the degradation of MB dyeunder UV irradiation. Additionally, the catalyst could be easily recovered and reused four times without significantly loss for its crystallinity and activity.
