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作 者:魏强[1] 董建方 李文彬[1] 赵培然 丁菲菲[1] 李连之[1]
机构地区:[1]聊城大学化学化工学院,聊城252059 [2]山东工程技师学院材料科学系,聊城252027
出 处:《无机化学学报》2016年第5期789-798,共10页Chinese Journal of Inorganic Chemistry
基 金:山东省自然科学基金(No.Y2004B02);聊城大学大学生科技文化创新基金(No.SF2014042)资助项目
摘 要:合成了2个新的L-组氨酸水杨醛希夫碱混配体镍(Ⅱ)配合物,[Ni(Sal-L-His)(Phen)]·H_2O(1)(Sal-L-His=L-组氨酸水杨醛希夫碱,Phen=菲咯啉)和[Ni(Sal-L-His)(Bipy)]_2·2CH_3OH·3H_2O(2)(Bipy=2,2′-联吡啶)。X射线单晶衍射测定表明,1为单核配合物,属于单斜晶系,P21/c空间群,晶胞参数为:a=1.586 31(13)nm,b=1.215 11(11)nm,c=1.211 30(9)nm,β=106.581(2)°,V=2.237 7(3)nm^3,Z=4。2为双核配合物,属于正交晶系,C2221空间群,晶胞参数为:a=1.415 30(13)nm,b=1.717 71(15)nm,c=2.256 02(19)nm,V=5.484 6(8)nm^3,Z=4。紫外吸收光谱、荧光光谱、圆二色光谱和粘度测定等研究表明,2个配合物与小牛胸腺DNA(CT-DNA)均以插入方式相结合。运用NBT光照还原法测定了配合物的超氧化物歧化酶(SOD)活性,求得IC50(1)=51.5μmol·L^(-1),IC50(2)=58.1μmol·L^(-1)。Two new nickel(Ⅱ) complexes, [Ni(Sal-L-His)(Phen)]·H2O (1) (Sal-L-His=the Schiff base derived from salicylaldehyde and L-Histidine, Phen=1,10-phenanthroline), and [Ni(Sal-L-His)(Bipy)]2.2CH3OH.3H20 (2)(Bipy= 2,2'-Bipyridine), have been synthesized. Their crystal structures have been determined by single crystal X-ray diffraction analysis. It showed that 1 is a mononuclear complex and belongs to monoclinic crystal system, P21/c space group with the cell parameters: a=1.586 31(13) nm, b=1.215 11(11) nm, c=1.211 30(9) nm, β=106.581(2)°, V=2.237 7(3) nm^3, Z=4; 2 is a binuclear complex and belongs to orthorhombic crystal system, C2221 space group with the cell parameters: a=1.415 30(13) nm, b=1.717 71(15) nm, c=2.256 02(19) nm, V=5.484 6(8) nm3, Z=4. The results of UV absorption, fluorescence, circular dichroism (CD) spectra and viscosity measurement indicated that the two complexes bind to CT-DNA in an same intercalative mode. SOD-like activities of the complexes were determined by the modified photoreduction of NBT. The value of IC50 (1) is 51.5μmol· L^-1 and IC50 (2) is 58.1 μmol·L^-1. CCDC: 1038774, 1; 1420088, 2.
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