| 基于香豆素Schiff碱的Zn2+、Co2+和Ni2+配合物的合成、晶体结构及光谱性质 | |
| Self-Assembled Zn2+, Co2+ and Ni2+ Complexes Based on Coumarin Schiff Base Ligands: Synthesis, Crystal Structure and Spectral Properties | |
| 摘要: 合成了3个香豆素Schiff碱单核Zn2+、Co2+和双核Ni2+的配合物，[Zn（L1）2]（1）（HL1=6-（（4-二乙胺基-2-羟基-亚苄基）-氨基）-苯并吡喃-2-酮），[Co（L2）2]（2）（HL2=6-（（4-甲氧基-2-羟基-亚苄基）-氨基）-苯并吡喃-2-酮），[Ni2（L3）2（CH3OH）4）]（3）（H2L3=4-羟基-3-（（4-甲氧基-2-羟基-亚苄基）-氨基）-苯并吡喃-2-酮）。利用元素分析、红外光谱、紫外可见光谱、荧光光谱及X射线单晶衍射分析等手段对其进行了表征。X射线单晶衍射分析结果表明：配合物1和配合物2均为单核结构，由1个金属离子和2个配体单元组成；配合物3具有双核结构，由2个金属离子、2个配体单元及4个配位的甲醇分子组成。配合物1、2和3分别是单斜晶系、三斜晶系和三斜晶系，所属的空间群分别为C2/c、P1和P21/n；中心金属Zn2+和Co2+离子的空间构型为四配位的四面体，Ni2+离子的空间构型为六配位的扭曲的八面体。此外，通过对配体HL1和HL2的紫外可见光谱性质研究发现，在DMF/H2O（4：1，V/V）溶液中，自由配体HL1和HL2分别可以选择性识别Hg2+和Zn2+，通过计算得到其检测限分别为7.45和6.10 μmol·L-1。荧光性质研究发现在DMF/H2O（4：1，V/V）溶液中自由配体HL2可以检测Zn2+，检测限为2.91 μmol·L-1。 | |
| 关键词: 香豆素Schiff碱 过渡金属配合物 晶体结构 光谱性质 | |
| 基金项目: | |
| Abstract: Mononuclear Zn2+, Co2+ complexes and binuclear Ni2+ complex based on coumarin Schiff base ligands,[Zn(L1)2] (1) (HL1=6-((4-diethylamino-2-hydroxy-benzylidene)-amino)-benzopyran-2-one),[Co(L2)2] (2) (HL2=6-((4-methoxy-2-hydroxy-benzylidene)-amino)-benzopyran-2-one) and[Ni2(L3)2(CH3OH)4] (3) (H2L3=4-hydroxy-3-((4-methoxy-2-hydroxy-benzylidene)-amino)-benzopyran-2-one), were synthesized and characterized by elemental analysis, IR, UV-Vis, fluorescence spectra and X-ray single crystal diffraction analysis. The crystal structure analysis represents that the complexes 1 and 2 possess mononuclear structure composed of one metal ion (Zn2+ or Co2+) and two ligand units ((L1)- or (L2)-). Whereas complex 3 had binuclear structure, containing two Ni2+ ions, two ligand units (L3)2- and four coordination methanol molecules. The crystals of complexes 1, 2 and 3 are solved as monoclinic space group C2/c, triclinic space group P1 and triclinic space group P21/n, respectively. The spatial configurations of the central metal Zn2+ and Co2+ ions are four-coordinated tetrahedrons, and the Ni2+ ion is six-coordinated twisted octahedrons. In addition, UV-Vis studies demonstrate that the free ligands HL1 in DMF/H2O (4:1, V/V) solution and HL2 in DMSO/H2O (4:1, V/V) solution could selectively recognize Hg2+ and Zn2+, respectively. The detection limits were calculated to be 7.45 and 6.10 μmol·L-1, respectively. Fluorescence studies indicate that HL2 exhibits ability of selective recognition Zn2+ against other common cationic including Ag+, Ba2+, Ca2+, Cd2+, Cr3+, Cu2+, Fe3+, Mg2+, Mn2+ and Hg2+ in DMSO/H2O (4:1, V/V), and the detection limit was calculated to be 2.91 μmol·L-1. | |
| Keywords: coumarin Schiff-base transition metal complex crystal structure spectral property | |
| 投稿时间：2020-09-30 修订日期：2021-03-19 | |
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| 郭耿,李娟,武娅,丁文敏,张淑珍,孙银霞.基于香豆素Schiff碱的Zn2+、Co2+和Ni2+配合物的合成、晶体结构及光谱性质[J].无机化学学报,2021,37(6):1113-1124. | |
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| Support information: 相关附件： file200462_Supporting_information.doc | |
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