| Synthesis and catalytic activity of novel heteronuclear Ln(Ⅲ)-Cu(Ⅱ) complexes with noncyclic polyether-amino acid Schiff base |
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| 引用本文： | 姚克敏
,李宁
,黄巧虹
,沈联芳
,袁汉珍.Synthesis and catalytic activity of novel heteronuclear Ln(Ⅲ)-Cu(Ⅱ) complexes with noncyclic polyether-amino acid Schiff base[J].中国科学B辑(英文版),1999(1). |
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| 作者姓名： | 姚克敏 李宁 黄巧虹 沈联芳 袁汉珍 |
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| 作者单位： | YAO Kemin LI Ning HUANG Qiaohong
(Department of Chemistry，Zhejiang University，Hangzhou 310027，China)
SHEN Lianfang and YUAN Hanzhen
(State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics，Wuhan Institute of Physics and Mathematics，Chinese Academy of Sciences，Wuhan 430071，China) |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (Grant No. 29671026)，Natural Science Foundation of Zhejiang Province (Grant No. 296062)，the Laboratory of MRAMP (Grant No. 971502) |
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| 摘 要： | A series of novel heteronuclear Ln(Ⅲ)-Cu(Ⅱ) complexes with noncyclic polyether-amino acid Schiff base were synthesized. The general formula is LnCu_2(H_2TALY)(NO_3)_5](NO_3)_2' nH_2O(Ln=La, Nd, Sm, Gd, n= 4; Ln=Yb, Y, n=3), where H_2TALY = tetraglycol aldehyde bis-lysine Schiff base. It is the first time to report the synthetic method for this new Cu(Ⅱ) complexes and Ln(Ⅲ)-Cu(Ⅱ) heteronuclear complexes. The complexes were characterized by elemental analysis, IR spectra, TG-DTA, magnetic susceptibility, and especially by a 500 MHz NMR spectrometer for 2D-COSY NMR. Coordination mechanism and structures of complexes have been suggested as well. Of particular interest is the potential that the novel complexes obtained may be used as a catalyst, which prompted us to investigate them. It shows 100% conversion with the viscosity-average molecular weight 120 000 for the polymerization of methyl methacrylate (MMA) without addition of any cocatalyst. Furthermore, the complexes with such aliphatic Schiff bas
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| 关 键 词： | novel Schiff base Ln(Ⅲ)-Cu(Ⅱ) heteronuclear complexes catalytic activity. |
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