Two Isostructural Layered Lanthanide(III) Complexes: Syntheses,Structures, Magnetic and Luminescent Properties |
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| Authors: | Lu Huang Yu Zhang Zhong-Yi Liu Xiu-Guang Wang Xiao-Jun Zhao En-Cui Yang |
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| Affiliation: | College of Chemistry, Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education, Tianjin Normal University, 300387 Tianjin, P. R. China |
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| Abstract: | Two N'-(2-hydroxybenzylidene)pyridine N-oxide-carbohydrazide (H3L)-based coordination complexes with the formula [Ln2(DMF)2(OAc)2(HL)2]n (Ln = Dy for 1 and Eu for 2 ) were solvothermally synthesized. Crystal structures, thermal stabilities, magnetic and luminescent properties of the two complexes were fully investigated. Both complexes are isomorphic two-dimensional layers with centrosymmetric {Ln2} subunits extended by doubly deprotonated HL2– connectors. Complex 1 with highly anisotropic DyIII spin exhibits slightly frequency-dependent magnetic relaxations under zero dc field with an effective energy barrier of ca. 6.84 K. EuIII-based complex 2 displays only one weak fluorescent emission around 532 nm with the absence of characteristic emission of EuIII ion. These results provide helpful hints of the hydrazide Schiff-functionalized organic ligands on the function modulations of the resulting Ln complexes. |
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| Keywords: | Crystal structure Lanthanides Magnetic relaxation Energy barrier Luminescence |
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