title: Synthesis, Structural Diversity and Mimic Superoxide Dismutase of Mn(II) Complexes Derived from N, O-donor Schiff bases.
abstract: Two new potentially tetradentate Schiff base ligands N'-(pyridin-2-ylmethylene)nicotinohydrazide (L1), and N'-(pyridin-2-ylmethylene)isonicotinohydrazide (L(2)) were synthesized. Reactions of hydrazone ligands L(1) and L(2) with Mn(NO(3))(2) afford two mononuclear Mn(II) complexes, [Mn(L(1))(NO(3))(H(2)O)(2)]•(NO(3)) (1) and [Mn(L(2))(2)(NO(3))(H(2)O)]•(NO(3)) (2). For complexes 1 and 2, L(1) and L(2) act as pincer-like tridentate or bidentate ligands, respectively. The Mn(II) ions in the two compounds are both in heptacoordinated environment, while the two molecules display diverse solid-state supramolecular structures because of the different orientation of Npyridine and hydrogen bonding patterns of nitrate anions. Complex 1 features 2D supramolecular sheet, while complex 2 is double-chain supramolecular structure. Both of the two complexes exhibit moderate superoxide dismutase (SOD) mimetic activity.
authors.forename: Jie
authors.initials: J
authors.lastname: Qin
authors.forename: Qiang
authors.initials: Q
authors.lastname: Yin
authors.forename: Shan-Shan
authors.initials: SS
authors.lastname: Zhao
authors.forename: Jun-Zheng
authors.initials: JZ
authors.lastname: Wang
authors.forename: Shao-Song
authors.initials: SS
authors.lastname: Qian
mesh_terms: D032701:Biomimetics; D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D012545:Schiff Bases / Q000138:chemical synthesis* / Q000737:chemistry; D013482:Superoxide Dismutase / Q000737:chemistry* / Q000378:metabolism
chemical_list: D012545:Schiff Bases; D013482:Superoxide Dismutase