Syntheses,Structures, and Properties of the 3D Lanthanide Organic Frameworks with N‐Heterocyclic Polycarboxylic Acids |
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| Authors: | Ai‐Hong Yang Li‐Hua Zhao Xue‐Jie Qi Yi‐Wei Lu |
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| Institution: | 1. Tianjin Key Laboratory of Chemistry, and Analysis of Chinese Materia Medica, College of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, P. R. China;2. Renai College of Tianjin University, Tianjin 301636, P. R. China;3. Tianjin University of Traditional Chinese Medicine Library, Tianjin 300193, P. R. China |
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| Abstract: | Four 3D lanthanide organic frameworks from potassium pyrazine‐2, 3, 5, 6‐tetracarboxylate (K4pztc) or potassium pyridine‐2, 3, 5, 6‐tetracarboxylate (K4pdtc), namely, {KEu(pztc)(H2O)2] · H2O}n ( 1 ), {KTb(pztc)(H2O)2] · 1.25H2O}n ( 2 ), {KLn(pdtc)(H2O)] · H2O}n Ln = Gd ( 3 ), Ho ( 4 )], were synthesized by reaction of the corresponding lanthanide oxides with K4pztc or K4pdtc in presence of HCl under hydrothermal conditions, and characterized by elemental analysis, TGA, IR and fluorescence spectroscopy as well as X‐ray diffraction. In complexes 1 and 2 , the dodecadentate chelator pztc4– links four LnIII ions and four KI ions. The coordination mode of the pztc4– ligand is reported for the first time herein. Complexes 3 and 4 are isostructural with earlier reported Nd, Dy, Er complexes. Moreover, the EuIII and TbIII complexes exhibit the characteristic luminescence. |
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| Keywords: | Pyrazine‐2 3 5 6‐tetracarboxylate Pyridine‐2 3 5 6‐tetracarboxylate Lanthanides 3D organic frameworks Fluorescence measurement |
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