含末端炔基的Salen型金属配合物的合成、表征及性质

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

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.

We synthesized two terminal alkynyl modified Salen ligands, H2L~, and their metal complexes, MLn （n=1, 2, M=Ni, Cu, Mn）. The ligands and complexes were characterized by 1H nuclear magnetic resonance （IH 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（lll）/Mn（ll）. Molar conductivity measurements of the complexes showed that they were all weak electrolytes with certain conductivity.