Cu(Ⅱ)配合物的制备、结构多样性及超氧化物歧化酶活性

To construct superoxide dismutase (SOD) mimetics, three Cu(Ⅱ) coordination polymers (CPs), [Cu3(L1)4(OH)2(H2O)2]n (CP 1), [Cu(L2)(OH)]n (CP 2) and [Cu(L2)(CH3O)]n (CP 3), in which n is a positive integer, are synthesized by solvothermal method using nicotinate N-oxide (HL1) or isonicotinate N-oxide (HL2) as organic ligands and Cu(OAc)2·H2O as metal salt. Their structures and properties are characterized by single crystal X-ray diffraction, X-ray powder diffraction, infrared spectroscopy, elemental analysis, thermogravimetric analysis and ultraviolet spectroscopy. CPs 1~3 are synthesized under similar solvothermal conditions, but show a multi-dimensional configurations from one-dimensional, two-dimensional to three-dimensional, respectively, exploring the possible mechanisms of the relative position of functional groups in ligand, the coordination mode of ligand and the solvent system on the structural diversity of CPs. Thermogravimetric analysis shows that CPs 1~3 can be stabilized up to 202, 228, and 250 ℃, respectively, which display good thermal stability, and the higher the dimension of CPs 1~3, the better the thermal stability. Nitrotetrazolium blue chloride (NBT) photoreduction test shows that the semi-inhibitory concentration values (IC50) of CPs 1~3 are 0.21, 0.26 and 0.62 μmol/L, respectively, which display certain SOD activity, and the lower the dimension of CPs 1~3, the better the SOD activity. The lower IC50 of CP 1 and CP 2 indicating that they can be used as potential SOD mimetics.     

Cu(Ⅱ)配合物的制备、结构多样性及超氧化物歧化酶活性

为了构筑超氧化物歧化酶(SOD)模拟物，采用溶剂热法，以吡啶-3-羧酸-1-氧(HL1)和吡啶-4-羧酸-1-氧(HL2)为有机配体，与一水合醋酸铜〔Cu(OAc)₂?H₂O〕金属盐反应合成了3种Cu(Ⅱ)的配合物(CPs):[Cu₃(HL1)₄(OH)₂(H₂O)₂]_n(CP1)、[Cu(HL2)(OH)]_n(CP2)和[Cu(HL2)(CH₃O)]_n(CP3)，其中n为正整数。通过单晶XRD、FTIR、元素分析、TGA、UV光谱对其进行了结构和性能表征。CP1～3在相似的溶剂热条件下合成，却分别显示出一维、二维到三维的多维度构型，探讨了配体官能团的相对位置、配体的配位模式和溶剂体系在配合物的结构多样性方面的可能机制。TGA表明，CP1～3可以分别稳定到202、228、250℃，具有较好的热稳定性，且CP1～3的维度越高，热稳定性越好。通过氯化硝...