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Insights into crystal structures,supramolecular architectures and antioxidant activities of self-assembled fluorescent hetero-multinuclear [Cu (II)-Ln (III)] (Ln = La,Ce, Pr and Nd) salamo-like complexes |
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| Authors: | Lu-Mei Pu Xiao-Xin An Chang Liu Hai-Tao Long Li Zhao |
| Institution: | 1. College of Science, Gansu Agricultural University, Lanzhou, Gansu, 730070 China;2. School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu, 730070 China
Contribution: Investigation;3. School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu, 730070 China Contribution: Data curation, Software;4. College of Science, Gansu Agricultural University, Lanzhou, Gansu, 730070 China Contribution: Data curation, Formal analysis;5. School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu, 730070 China |
| Abstract: | Newly designed hetero-dinuclear 3d–4f complex Cu(L)La (NO3)2(μ-NO3)(H2O)]·EtOH ( 1 ), hetero-tetranuclear 3d–4f complex Cu(L)Ce (NO3)2(μ-NO3)(OAc)2]2·MeOH ( 2 ) and hetero-multinuclear 3d–4f complexes {Cu(L)Ln (NO3)3}2]Cu(L)Ln (NO3)3]2 (Ln = Pr ( 3 ) and Nd = ( 4 )) have been self-assembled from the reaction of Cu (OAc)2·H2O, Ln (NO3)3·6H2O (Ln = La, Ce, Pr and Nd) with an unsymmetric salamo-like bisoxime ligand H2L (6-Methoxy-6′-ethoxy-2,2′-ethylenedioxybis (nitrilomethylidyne)]diphenol) based on a Schiff base condensation of 2-O-(1-ethoxyamide)]oxime-6-methoxyphenol and 3-ethoxysalicylaldehyde. The structures of complexes 1 – 4 were characterized by elemental analyses, PXRD analyses, IR, UV–Vis spectra, and single-crystal X-ray analyses. In addition, the supramolecular interactions and fluorescence properties of complexes 1 – 4 are discussed in detail. Moreover, the antioxidant activities of the complexes 1 – 4 were determined by superoxide radical-scavenging method in vitro, which indicates that the complexes 1 – 4 all show potential antioxidant properties. |
| Keywords: | crystal structure hetero-multinuclear 3d-4f complex property Salamo-like bisoxime ligand synthesis |