A highly photocatalytic polyoxomolybdate compound constructed from novel-type triple helix {Mo4O12}n chains and copper(i)–organic nets

Abstract

A novel-type 3D polyoxomolybdate–organic framework, {[Cu₃(H₃tpb)₂(tpb)(Mo₄O₁₂)]·4H₂O}_n (1, H₃tpb = 1,3,5-tri(1H-pyrazol-3-yl)benzene), was prepared and characterized by elemental analysis, IR spectroscopy, and luminescence analysis. Single-crystal X-ray diffraction analysis reveals that novel neutral triple helix {Mo₄O₁₂}_n chains are encased in bowl-like 2D [Cu₃(H₃tpb)₂(tpb)]_n intervals via bond interactions between terminal oxygen atoms and cations of Cu(I), leaving an unprecedented (3,3,5,8)-connected (3·4·6⁸)₃(3⁶·4⁶·8⁶·9⁶·10⁴)(4³)₂(6³) topology. Moreover, compound 1 exhibits remarkable photocatalytic activities for decomposition of methylene orange (MO), methylene red (MR), methylene blue (MB), methylene violet (MV), and rhodamine B (RhB) under UV light.