Tsai Meng-Jung, Tsai Chi-Jou, Lin Ken, Wu Jing-Yun
Department of Applied Chemistry, National Chi Nan University, Nantou 545, Taiwan.
Polymers (Basel). 2020 Aug 24;12(9):1910. doi: 10.3390/polym12091910.
A salicyaldimine ligand, 3-tert-butyl-4-hydroxy-5-(((pyridin-2-ylmethyl)imino)methyl)benzoic acid (HL) and two Cu(II)-salicylaldimine complexes, [Cu(HL)Cl] () and [Cu(HL)(NO)] (), have been synthesized. Complex has a discrete mononuclear structure, in which the Cu(II) center is in a distorted square-planar geometry made up of one HL monoanion in an NNO tris-chelating mode and one Cl anion. Complex adopts a neutral one-dimensional zigzag chain structure propagating along the crystallographic [010] direction, where the Cu(II) center suits a distorted square pyramidal geometry with a value of 0.134, consisted of one HL monoanion as an NNO tris-chelator and two NO anions. When the Cu∙∙∙O semi coordination is taken into consideration, the nitrato ligand bridges two Cu(II) centers in an unsymmetrical bridging-tridentate with a , O,O':O',O″ coordination. Clearly, anion herein plays a critical role in dominating the formation of discrete and polymeric structures of copper salicyaldimine complexes. Noteworthy, complex is insoluble but highly stable in HO and various organic solvents (CHOH, CHCN, acetone, CHCl and THF). Moreover, complex shows good photocatalytic degradation activity and recyclability to accelerate the decolorization rate and enhance the decolorization performance of acid orange 7 (AO7) dye by hydrogen peroxide (HO) under daylight.
已合成一种水杨醛亚胺配体，即3 - 叔丁基 - 4 - 羟基 - 5 -（（（吡啶 - 2 - 基甲基）亚氨基）甲基）苯甲酸（HL）以及两种铜（II） - 水杨醛亚胺配合物，[Cu(HL)Cl]（）和[Cu(HL)(NO)]（）。配合物具有离散的单核结构，其中铜（II）中心处于扭曲的四方平面几何构型，由一个以NNO三齿螯合模式存在的HL单阴离子和一个Cl阴离子组成。配合物采用沿晶体学[010]方向传播的中性一维锯齿链结构，其中铜（II）中心适合扭曲的四方锥几何构型，值为0.134，由一个作为NNO三齿螯合剂的HL单阴离子和两个NO阴离子组成。当考虑铜∙∙∙O半配位时，硝酸根配体以不对称桥连三齿的、O，O':O'，O″配位方式桥连两个铜（II）中心。显然，此处的阴离子在主导铜水杨醛亚胺配合物离散和聚合结构的形成中起关键作用。值得注意的是，配合物在水中和各种有机溶剂（甲醇、乙腈、丙酮、氯仿和四氢呋喃）中不溶但高度稳定。此外，配合物在日光下通过过氧化氢（）表现出良好的光催化降解活性和可回收性，以加速酸性橙7（AO7）染料的脱色速率并提高其脱色性能。
