An unusual Cd-substituted sandwich-type polyoxomolybdate cluster {Mo 20 Cd 2 } for photocatalysis of organic pollutant

Abstract An unusual Cd-substituted sandwich-type polyoxomolybdate cluster {Mo 20 Cd 2 }, namely, [Cd(H 2 ttb)(H 2 O)Mo 10 O 32 (ttb)] 2 ·3H 2 O ( 1 ) has been synthesized under hydrothermal condition (ttb = 1,3,5-tris(1,2,4-triazol-1-ylmethyl)-2,4,6-trimethyl benzene). Its structure has been determined by single crystal X-ray diffraction analysis and further characterized by elemental analysis, IR and TG. In 1 , two decademolybdates are functionalized by ttb organic groups, which are further linked into a sandwich-type polyoxometalate cluster {Mo 20 Cd 2 } via two [Cd(H 2 O)(H 2 ttb)] 4 + cations. The solid state photoluminescent property of 1 was investigated at room temperature. In addition, its photocatalytic performance for methylene blue ( MB ) has also been studied under UV irradiation.