含末端炔基的Salen型金属配合物的合成、表征及性质

设计合成了新型含有末端炔基的Salen型配体H2Ln及其系列金属配合物MLn(n=1,2;M=Ni,Cu,Mn),并用氢核磁共振(1H NHR)谱、电喷雾质谱(ESI-MS)、元素分析(EA)、傅里叶变换红外(FT-IR)光谱和紫外-可见(UV-Vis)光谱等对各目标化合物进行了表征.采用循环伏安法研究了配体及其金属配合物的电化学氧化还原性质.研究发现,配体除H2L1外均在测试范围内出现特征的亚胺氧化还原峰.镍和铜的配合物均经历了两个单电子的氧化还原过程;锰的配合物均出现由Mn(III)/Mn(II)产生的一对氧化还原峰,该过程为准可逆的单电子过程.H2Ln及MLn的溶液摩尔电导率数据显示,各目标化合物为弱电解质,具有一定的导电性.

Synthesis,Characterization and Properties of Terminal Alkynylate Modified Salen-Type Complexes

We synthesized two terminal alkynyl modified Salen ligands, H₂Lⁿ, and their metal complexes, MLⁿ (n=1, 2, M=Ni, Cu, Mn). The ligands and complexes were characterized by ¹H nuclear magnetic resonance (¹H NMR) spectroscopy, electrospray ionization mass spectrometry (ESI-MS), elemental analysis, Fourier transform infrared (FT-IR) spectroscopy, and ultraviolet visible (UV-Vis) spectroscopy. The redox properties of the compounds were investigated with cyclic voltammetry (CV). Imine redox peaks appeared in the CV curves of all the ligands except H₂L¹. The Ni and Cu complexes underwent two single electron redox processes in the scanning range. Mn complexes gave a pair of quasi-reversible voltammetric peaks, which corresponded to the redox process between Mn(III)/Mn(II). Molar conductivity measurements of the complexes showed that they were all weak electrolytes with certain conductivity.