Abstract
Five mixed-ligand coordination polymers, [Ln2(PTCP)2(m-BDC)3] n · nH2O (Ln = Pr (1), Sm (2), Eu (3), Tb (4), Dy (5); m-BDC = 1,3-benzenedicarboxylate; PTCP = 2-phenyl-1H-1,3,7,8-tetraazacyclopenta[l]phenanthrene), were synthesized and characterized by IR spectra, elemental analyses, thermogravimetric analyses, single-crystal X-ray diffraction, and solid-state photoluminescent spectra. X-ray crystallographic analyses reveal that the five complexes are 1-D structures based on dinuclear [Ln2O12N4] units and further assembled into 3-D supramolecular networks by hydrogen bonds and π···π stacking interactions. The solids possess high thermal stabilities, with 3 and 4 exhibiting strong pure red and green characteristic emissions of Eu(III) and Tb(III) at room temperature.
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