2D pillar-chained 3d-4f heterometallic coordination polymers based on 2,4′-biphenyldicarboxylate

Two new 2D 3d-4f heterometallic compounds [LnIIICuII(2,4′-bpdc)2(μ3-OH)(C2H5OH)H2O]n (Ln = Tb(1) and Eu(2), 2,4′-H2bpdc = 2,4′-biphenyldicarboxylic acid) have been successfully constructed by the solvothermal reaction of Ln2O3, Cu(NO3)2 and 2,4′-H2bpdc in ethanol, and characterized by element analysis, IR spectroscopy, and thermal analysis, as well as single crystal X-ray diffraction. The results reveal that two complexes are isomorphous and exhibit 2D pillar-chained coordination frameworks with 36·46·53 topology constructed from one-dimensional lanthanide-transition oxo-bridged heterometallic chains [LnCu(μ2-O)2(μ3-OH)2]n and (2,4′-bpdc2−)2 pillars. Furthermore, the photoluminescent properties of two compounds 1 and 2 were also studied.