A New Manganese(III) Complex from Bis(5‐methylsalicylaldehyde)‐3‐oxapentane‐1, 5‐diamine: Synthesis, Characterization, Antioxidant Activity and Luminescence. Issue 11 (30th October 2015)

• Record Type: Journal Article
• Authors: Wu, Huilu; Wang, Cuiping; Wang, Fei; Peng, Hongping; Zhang, Han; Bai, Yuchen
• Is Part Of: Journal of the Chinese Chemical Society. Volume 62:Issue 11(2015:Nov.)
• Page Start: 1028
• Page End: 1034
• Publication Date: 2015-10-30
• Subjects: Bis(5‐methylsalicylaldehyde)‐3‐oxapentane‐1, 5‐diamine -- Manganese(III) -- Crystal structure -- Antioxidant -- Fluorescence; Chemistry -- Periodicals; Electronic journals; 540.5
• DOI: 10.1002/jccs.201500121
• Languages: English
• ISSNs: 0009-4536

Abstract

Abstract : A Schiff base ligand bis(5‐methylsalicylaldehyde)‐3‐oxapentane‐1, 5‐diamine (H2 L) has been prepared. Reaction of the shape‐specific designed ligand with MnAc2 afforded a new complex, namely, [Mn2 L2 Ac2 ]1 . The ligand and complex1 were characterized by physic‐chemical and spectroscopic methods. The crystal structure of complex1 has been determined by single‐crystal X‐ray diffraction. It reveals a centrosymmetric binuclear neutral entity, in which Mn(III) ion is bridged by two ligand L and six‐coordinated with the coordination surround of distorted octahedron geometry. The antioxidant activities of the ligand and complex1 were in vitro determined by superoxide and hydroxyl radical scavenging methods, which indicates that the complex1 exhibits better scavenging activity of hydroxyl radical and superoxide radical than the ligand. Moreover, under the excitation at room temperature, luminescence studies have been carried out on solution‐state samples. The result of their fluorescence properties shows that the strong and characteristic luminescence for the ligand and complex. The complex1 exhibited intense shift in the fluorescence band compare to the ligand attributed to the coupled effect of the metal and the ligand.