Unprecedented 7-connected 36 · 413 · 62 structural topology: Praseodymium-based coordination polymers built from mixed carboxylate ligands

A new lanthanide coordination polymer [Pr(dpdc)(nta)]n (1) (H2dpdc = 2,2′-diphenyldicarboxylate acid, Hnta = nicotinic acid) has been prepared and characterized by IR, element analysis, TGA, and single-crystal X-ray diffraction. 1 is built up from two different carboxylate ligands and shows an unusual two-dimensional (2D) 7-connected 36 · 413 · 62 topological network. The zero-field splitting parameter was obtained by varied magnetic susceptibilities measurement (2–300 K).