КООРДИНАЦИОННАЯ ХИМИЯ, 2017, том 43, № 1, с. 54–62 УДК 541.49 SYNTHESIS, CRYSTAL STRUCTURE, ANTIOXIDATION, AND LUMINESCENCE OF A MONONUCLEAR DYSPROSIUM(III) COMPLEX BASED ON THE bis(3-METHOXYSALICYLIDENE)-3-OXAPENTANE1,5-DIAMINE LIGAND © 2017 C. F. Li, Y. L. Xu, Y. C. Bai, and H. L. Wu* School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu, 730070 P.R. China *E-mail: wuhuilu@163.com Received January 20, 2016 The synthesis and characterization of the ligand bis(3-methoxysalicylidene)-3-oxapentane-1,5-diamine (Bod) and its complex [Dy(Bod)(NO3)3] (I) are presented. <...> In the complex, the metal ions are ten-coordinate and all centeral ions are the fifteen twisted surface (CIF file CCDC no. 1010541). <...> The antioxidant activity of the ligand and the Dy(III) complex was determined by superoxide and hydroxyl radical-scavenging method in vitro, which indicates that the complexes exhibit better scavenging activity of hydroxyl radical and superoxide radical than the ligand. <...> Luminescence studies have been carried out on the solid and solution-state samples. <...> The fluorescence properties show the strong and characteristic luminescence for the ligand and complex. <...> DOI: 10.7868/S0132344X17010054 INTRODUCTION The interest in the chelation of metal ions by Schiff base macrocyclic (coronands) and open-chain (podands) ligands has continually increased owing to the recognition of the role of played by these structures in bioinorganic and medicinal inorganic chemistry [1– 4]. <...> Luminescent lanthanide complexes have attracted a lot of attentions due to their applications in fluorescence materials, electroluminescent devices and medicinal diagnostics. <...> The luminescent properties of lanthanides complexes are dependent of the f-configuration of the metal and organic ligands [8]. <...> The luminescent intensities of the lanthanide metal complexes are strongly dependent on the efficiency of the organic ligand to absorb UV light, the efficiency of energy transfer from the ligand to metal, and the efficiency of 54 lanthanide metal luminescence [16–18]. <...> On the other hand, an excess of activated oxygen species in the forms of superoxide anion ( ) and hydroxyl radical (HO•), generated by normal metabolic processes, may cause various diseases, such as carcinogenesis, drug-associated toxicity, inflammation, atherogenesis, and aging in aerobic organisms [21]. <...> Although a variety of (HO•) scavengers are known, their application is limited by: (1 <...>