Geometric and electronic structures of five-coordinate manganese(II) "picket fence" porphyrin complexes
Geometric and electronic structures of five-coordinate manganese(II) "picket fence" porphyrin complexes
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五配位锰(II)“栅栏”卟啉配合物的几何结构和电子结构
DOI：
10.1039/c5dt00685f
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发表时间：
2015
影响因子：
4
通讯作者：
Li Jianfeng
中科院分区：
文献类型：
--
作者：
Yu Qiang;Liu Yanhong;Liu Diansheng;Li Jianfeng
合成了三个五配位高自旋锰（II）“栅栏”卟啉配合物[Mn（TpivPP）（L）]（TpivPP = α，α-四（邻新戊酰胺基苯基）卟啉; L = 1-MeIm（1-甲基咪唑），1-EtIm（1-乙基咪唑）和2-MeHIm（2-甲基咪唑）），并通过单晶X射线、紫外-可见光谱和电子顺磁共振（EPR）对其进行了研究.结构参数进行了研究，并与类似物进行比较。低温（90 K），高场EPR研究[Mn（TpivPP）（1-MeIm）]和[Mn（TpivPP）（2-MeHIm）]显示了五个共振，包括在5.9和2.0的特征信号。EPR谱的模拟给出了零场分裂（zfs）参数（D，E和λ）和超精细耦合常数（A）。
Three five-coordinate, high spin manganese(II) “picket fence” porphyrin complexes, [Mn(TpivPP)(L)] (TpivPP = α,α,α,α-tetrakis(o-pivalamidophenyl)porphyrinato; L = 1-MeIm (1-methylimidazole), 1-EtIm (1-ethylimidazole) and 2-MeHIm (2-methylimidazole)), are synthesized and studied by single-crystal X-ray, UV-vis and electronic paramagnetic resonance (EPR) spectroscopy. Structural parameters are investigated and compared with analogues. Low temperature (90 K), high field EPR studies of [Mn(TpivPP)(1-MeIm)] and [Mn(TpivPP)(2-MeHIm)] showed five resonances including characteristic signals at ∼5.9 and ∼2.0. The simulations of the EPR spectra give the zero field splitting (zfs) parameters (D, E and λ) and the hyperfine coupling constant (A).