Four novel Ln-bpdc coordination polymers [Ln(bpdc)(NO3)(DMA)2] [Ln = La(1), Pr(2), Sm(3), Eu(4)] [Ln = lanthanide, H2bpdc = 4,4-biphenyldicarboxylate acid and DMA = dimethylacetamide] have been solvothermally synthesized and structurally characterized by elemental analyses, IR spectra and single-crystal X-ray diffraction. 1-4 crystallize in the monoclinic space group P21/c and show a 2-D layer constructed from 1-D Ln-organic chain and tetradentate bpdc2 - ligand. The magnetic behavior of 2-4 has been investigated. The solid-state photoluminescent measurement illustrates that Eu(4) displays the strong fluorescent emissions, which demonstrate that π-rich aromatic organic bpdc2 - ligands can efficiently transfer energy to the EuIII ions. In addition, thermogravimetric analysis of Pr(2) is also described.
Lu, Y. B., Jin, S., Zhu, S. D., Zhang, S. Y., Lou, G. T., & Xie, Y. R. (2014). Four two-dimensional lanthanide(III)-4,4-biphenyldicarboxylate complexes: Syntheses, structures, magnetic and luminescent properties. Inorganic Chemistry Communications, 49, 120–123. https://doi.org/10.1016/j.inoche.2014.09.031