Hydrothermal Synthesis and Structure Characterization of a Novel 4,4′-Bipyridine Bridging Dumbbell-like Dimeric Pentamolybdate

1 INTRODUCTION Polyoxometalates (POMs) have been attracting extensive interest of many chemists in solid-state materials chemistry owning to the various structures and great potential applications in catalysis, medi- cine, photo-electricity and magnetism1～9]. Over the past decades, lots of novel POMs have been pre- pared by hydrothermal synthesis, such as discrete structure10], one-dimensional chain-like structure11, 12] and higher dimensional architecture13～18]. However, in these…

Hydrothermal Synthesis and Structure Characterization of a Novel 4,4′-Bipyridine Bridging Dumbbell-like Dimeric Pentamolybdate

A 4, 4′-bipyridine bridging dumbbell-like dimeric pentamolybdate 4, 4′-H2bipy]34,4′- Hbipy]2(Mo5O17)2(4,4′-bipy)] has been synthesized by hydrothermal synthesis and characterized by elemental analysis, IR spectrum, UV spectrum, TG and X-ray crystallography. The title compound crystallizes in triclinic, space group P with a = 10.578(2), b = 11.047(2), c = 16.576(3) , α = 79.86(3), β = 75.34(3), γ = 79.40(3)°, C60H58Mo10N12O34, Mr = 2450.58, V = 1824.8(6) 3, Z = 1, Dc = 2.230 g/cm3, F(000) = 1194, μ = 1.757 mm-1, the final R = 0.0252 and wR = 0.0559 for 5506 observed reflections with I > 2((I). The structural analysis indicates that the title compound contains a novel polyanion (Mo5O17)2(4,4-bipy)]8-, in which two identical (Mo5O17)4- anions are buttres- sed by a 4,4′-bipyridine molecule through Mo-N bond.