Synthesis and Magnetic Resonance Spectra of Heteronuclear Ln(Ⅲ)-Co(Ⅱ) Complexes with Bis salicylaldehyde Ethylenediamine Schiff Base

Chinese Journal of Applied Chemistry ›› 1998, Vol. 0 ›› Issue (5): 1-5.

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Synthesis and Magnetic Resonance Spectra of Heteronuclear Ln(Ⅲ)-Co(Ⅱ) Complexes with Bis salicylaldehyde Ethylenediamine Schiff Base

Lu Gui¹, Yao Kemin¹, Shen Lianfang²

1. Department of Chemistry, Zhejiang University, Hangzhou 310027;
2. Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics, Chinese Academy of Sciences, Wuhan

Received:1998-02-09 Revised:1998-06-15 Published:1998-10-10 Online:1998-10-10

Abstract

Abstract: A series of heteronuclear Ln(Ⅲ)-Co(Ⅱ) and Co(Ⅱ) complexes with bis salicylaldehyde ethylenediamine(SALEN) have been synthesized. They were characterized as LnCo(SALEN)₂(NO₃)₅·2H₂O(Ln=La,Nd,Sm,Gd,Yb,Y) and Co(SALEN)(NO₃)₂·3H₂O respectively. The differences between their compositions, structures and coordinations have been investigated by UV, IR, especially by ¹H NMR and EPR spectra. The EPR spectra of the GdCo(SALEN)₂(NO₃)₅·2H₂O complex in powder and various solvents at different temperatures and the“U”spectral feature, crystal field strength and local symmetry around Gd³⁺ have been discussed.

Key words: heteronuclear lanthanide complexes, Schiff base, NMR, EPR

Lu Gui, Yao Kemin, Shen Lianfang. Synthesis and Magnetic Resonance Spectra of Heteronuclear Ln(Ⅲ)-Co(Ⅱ) Complexes with Bis salicylaldehyde Ethylenediamine Schiff Base[J]. Chinese Journal of Applied Chemistry, 1998, 0(5): 1-5.

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Synthesis and Magnetic Resonance Spectra of Heteronuclear Ln(Ⅲ)-Co(Ⅱ) Complexes with Bis salicylaldehyde Ethylenediamine Schiff Base

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