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Citation: LU Gui, YAO Ke-Min, ZHANG Zhao-Ying, SHEN Lian-Fang. Studies on Synthesis,Magnetic Resonance and Biological Activity of Lanthanide Complexes with Noncyclic Polyether-Histidine Schiff Base[J]. Chinese Journal of Applied Chemistry, ;2001, 18(1): 1-4. shu

Studies on Synthesis,Magnetic Resonance and Biological Activity of Lanthanide Complexes with Noncyclic Polyether-Histidine Schiff Base

1.
a Department of Chemistry, Zhejiang University, Hangzhou, 310027;
2.
b Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan

Received Date: 13 March 2000
Available Online: 31 July 2000
Fund Project: 国家自然科学基金(29671026) (29671026)浙江省自然科学基金(296062)波谱与原子分子物理国家重点实验室资助 (296062)

Five lanthanide complexes with tetraglycol aldehyde bis-histidine Schiff base were synthesized and characterized by elemental analysis, IR spectrometry, TG-DTA and magnetic susceptibility as Ln₃(H₂L)₂(NO₃)₉(Ln=La,Nd,Gd,Er,Yb; L=C₂₀H₂₆N₆O₇). The obtained complexes were investigated in detail by high resolution solid state(HRSS) ¹³C NMR using cross polarization,magic angle spinning(CP/MAS)and total suppression of sidebands(TOSS) techniques. Some new information about the splitting peaks of ¹³C-for-COO^- group are given. On the basis of them,the coordination of imidazole group was discussed. The crystal field strength of the Gd(Ⅲ) complex was investigated by EPR spectrometry. The experimental results show that Er³⁺ complex has some biological activities and could dispose of O₂^·-.
- rare earth Schiff base complex,
- high resolution solid state ¹³C NMR,
- EPR spectrometry
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