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1

Magnetic Properties of Novel One-Dimensional Ni(II) Chain and Binuclear Cu(II)-Ni(II) Complexes

Ren S., Ma S. L.

Polish Journal of Chemistry

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2009

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Vol. 83, nr 2

181-186

EN

A novel one-dimensional chain with nickel(II) macrocyclic complex and extended terephthalato-bridged, namely, [Ni(L)(TPHA)]ź8H2O (1) (L = 1,3,6,9,11,14- hexaaza-tricyclo[12.2.1.16,9]octadecane, TPHA = terephthalate dianion) and a new binuclear Cu(II)-Ni(II) complex, [Cu(oxap)Ni(bpy)2](ClO4)2ź2H2O (2) [oxap = N,N?- bis(2-aminopropyl)oxamido dianion, bpy = 2,2?-bipyridine] have been magnetically characterized by variable-temperature magnetic susceptibilities measurements. The fitting results of the agnetic data of all two complexes support exhibiting the occurrence of an antiferromagnetic coupling with J values of -1.25 cm-1 for 1 and -93.9 cm-1 for 2, respectively.

2

Bimetallic Ag(I)-Cu(II) Assembly with Extended Oxamido-Bridged: Synthesis, Crystal Structure and Magnetism

Ma S. L., Ren S., Zhang H. Y.

Polish Journal of Chemistry

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2009

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Vol. 83, nr 1

39-46

EN

A new bimetallic compound Cu2(oxae)(H2O)2Ag2(CN)4 (1) (oxae = N,Nc- bis(2- amino - ethyl)oxamidodianion) was isolated and structurally characterized. Compound 1 crystallizes in the monoclinic system, with space group P21/c and unit cell constants a = 14.033(18), b = 7.165(9), c = 9.378(12) Capital a, beta = 103.890(14) graduate and Z = 2. The com plex 1 consists of the oxamido-bridged binuclear copper(II) unit and two linear cyanoargentate anions acting as monochelate ligands. The coordinated environment of the Cu atom is a square prism. The complex 1 is self-assembled into three-dimensional (3D) network via hydrogen bonds. The magnetic properties of 1 have been studied as well.

3

Novel Ferromagnetic Coupling Dicopper(II), Antiferromagnetic Dicobalt(II) and Dimanganese(II) Complexes with 3-Nitro-phthalato as Bridging Ligand: Synthesis, Spectrum and Magnetism

Ma S. L., Zhang L. Z., Lu L. L., Tang M. Y.

Polish Journal of Chemistry

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2002

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Vol. 76 / nr 4

511-517

EN

Novel copper(II), cobalt(II) and manganese(II) binuclear complexes have been synthesized, namely [Cu2(3-NO2-phth)(phen)4](ClO4)2 and [M2(3-NO2-phth)(phen)4(H2O)2](ClO4)2, whereM=Co orMn, phen = 1,10-phenanthroline and 3-NO2-phth denotes 3-nitro-phthalate dianion. Magnetic susceptibility measurements between 4.2-300 K (or 77-300 K) demonstrate a ferromagnetic interaction between two copper(II) ions in the Cu-Cu complex, and a weak antiferromagnetic interaction between the metal ions in Co-Co and Mn-Mn complexes. Based on spin Hamiltonian operator, _H = -2J _ S1_ _ S2 (S1=S2 = 1/2, S1=S2 = 3/2 or S1 = S2 = 5/2), J is found to be equal to +5.26 cm-1, -1.72 cm-1 and -0.62 cm-1 for the Cu-Cu, Co-Co and Mn-Mn complexes, respectively

4

Synthesis and Magnetic Properties of SOD Mimics – Two Copper(II) Binuclear Complexes Bridged by Oxamido-N,N’-diacetic Acid and Acetate Anion

Zhang L. Z., Ma S. L.

Polish Journal of Chemistry

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2001

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Vol. 75, nr 12

1833-1837

EN

It is well known that SOD (superoxide dismutase) plays a critical role in organism. How-ever, as a kind of protein, SOD itself has certain limits in the field of application. As a re-sult, the SOD-mimetic complexes which may better SOD-activity to a certain extent can be of much importance. Two SOD mimics which arę novel fi-oxamidato binuclear unit complexes with ID structure have been synthesized, namely {Na[Cu2(oxaa)L2OAc]}", where oxaa is oxamido-N,N'-diacetic acid tetraanion and L denotes l, 10-phenanthroline or 5-nitro-1,10-phenanthroline. The temperaturę dependence of the magnetic susceptibil-ities of {Na[Cu2(oxaa)(l,10-phen)2OAc]}" has been inyestigated in the 4.99-299 K rangę, giving the exchange parameter J = -309.0 cm"'. This result is commensurate with antiferromagnetic interaction between the adjacent metal ions.

5

New antiferromagnetic dinuclear complexes of manganese(II) with 1,8-naphthalato as bridging ligand: synthesis, spectrum and magnetism

Gao J., Ma S.L., Liao D.Z.

Polish Journal of Chemistry

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1998

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Vol. 72, nr 5

839-843

EN

Three manganese(II) binuclear complexes have been synthetized, namely [Mn2(NAPH)(L)4(ClO4)2, L is bpy(2,2'-bipyridyl), phen(1,10-phenanthroline) or NO2-phen(5-nitro-1,10-phenanthroline), NAPH denotes the 1,8-naphthalate dianion. Based on IR, elemental analyses nd conductivity measurement, these complexes are proposed to have extended NAPH-bridges structures and consist of two manganese(II) in a distorted octahedron environment. The temperature dependence of magnetic susceptibilities of manganese(II) complexes have been studied, giving the exchange integral J=-0.36 cm-1 (bpy); J=-0.49 cm-1 (phen), respectively. These results indicate a weak antiferromagnetic coupling between the paramagnetic ions in the complexes.