The first polyoxometalate-templated four-fold interpenetrated coordination polymer with new topology and ferroelectricity

MOFs including non- coordinating POMs as a template are rare. We report here the first four- fold interpenetrated POMtemplated 3D MOF [Cu-3(4,4'-bpy)(5)](2)[H2SiW11O39]center dot 5H(2)O, whose framework topology is previously unknown with the vertex symbol (6.6.8(2))(2)(6.6.8.8 x 10(6).10(6)).