Studies on EPR Spectra of Gd(Ⅲ) Ternary Complexes

Abstract

Abstract: Gd(Ⅲ) ternary complexes of the solid powder and THFsolution have been investigated by EPRspectra. The EPRspectra of Gd(Ⅲ) ternary complexes have many differences due to the change of the coordinated synergic agents. Resonance peaks of the solid powder complexes don't show an obvious difference between room temperature and liquid nitrogen, but solution EPRspectra of Gd(Ⅲ) ternary complexes in the liquid nitrogen shows a superfine splitting, fine splitting and super-hyperfine splitting. Most Gd(Ⅲ) complexes show prominent “U” spectrum feature. It results from the EPRspectra that the strength of crystal field of Gd(Ⅲ) ternary complexes belongs to the intermediate CFcategory, the asymmetry parameter λ ' is changed with the variation of the synergic agents.

Key words: Gadolinium, Electron paramagnetic resonance, “U&rdquo, spectrum, Ternary complex

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CHENG Yi-Xiang, ZHANG Zheng-Lin, XU Yuan-Zhi . Studies on EPR Spectra of Gd(Ⅲ) Ternary Complexes[J]. Chem. J. Chinese Universities, 2001, 22(5): 796.

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Studies on EPR Spectra of Gd(Ⅲ) Ternary Complexes

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