三种胺羧配合物的113Cd NMR研究

波谱学杂志 ›› 1992, Vol. 9 ›› Issue (1): 67-73.

三种胺羧配合物的¹¹³Cd NMR研究

宋瑞方¹, 毛友钢¹, 丁继贞²

1. 吉林大学理论化学研究所, 长春 130023;
2. 中科院生物物理所核磁实验室, 北京 100101

收稿日期:1991-01-21 修回日期:1991-05-15 出版日期:1992-03-05 发布日期:2018-01-20
基金资助:
国家自然科学基金资助课题

¹¹³Cd NMR STUDIES OF THREE Cd-POLYAMINO-CARBOXYLIC ACID COMPLEXES

Song Ruifang¹, Mao Yougang¹, Ding Jizhen²

1. Institute of Theoretical Chemistry, Jilin University, Changchun 130023;
2. NMR Laboratory, Institute of Biophysics, the Chinese Academy of Sciences, Beijing 100101

Received:1991-01-21 Revised:1991-05-15 Online:1992-03-05 Published:2018-01-20

摘要/Abstract

摘要： 该文对Cd-HEDTA(N-(2-羟基乙基)乙二胺-N',N',N'-三乙酸),Cd-PDTA(1,2丙二胺四乙酸)和Cd-DTPA(二乙三胺五乙酸)的¹¹³Cd NMR谱和自旋晶格弛豫时间T₁,及NOE因子进行了研究.结果表明,Cd-HEDTA和Cd-PDTA结构与Cd-EDTA类似,Cd-PDTA双线归因于其可能的两种异构体.Cd-DTPA大的化学位移表明其具有七配位的五角双锥结构.在这种结构中DTPA可用三个氮原子参加配位.对¹¹³Cd自旋晶格弛豫时间分析表明,Cd-DTPA配合物中质子偶极作用机理的贡献较大,这归因于Cd DTPA有更多的乙酸根亚甲基质子参与偶极作用.

关键词: ¹¹³Cd核磁共振, Cd(Ⅱ)-胺羧配合物

Abstract: ¹¹³Cd NMR spectra have been obtained on several Cd-polyaminocarboxylic acid complexes Cd-N-(2-Hydroxycthyl) ethylene diaminetriacetate (Cd-HEDTA), Cd-1,2-Propanediaminetetraacetate (Cd-PDTA) and Cd-Diethylenetriaminepentaacetatc (Cd-DTPA). The spectra revealed that Cd-HEDTA and Cd-PDTA have the same solution structure as the Cd-EDTA. The two lines of Cd-PDTA spectrum come from its two isomers and are indicative of the existance of more strained structure having the axial CH₃ group. The large chemical shift of Cd-DTPA shows that it is seven coordinated because in that case, three nitrogen atoms rather than two are bound to Cd atom. ¹¹³Cd nuclear Ovcrhauscr effect, η, and spin lattice relaxation time were determined for Cd-DTPA and Cd-HEDTA and used in the analysis of the contribution to the relaxation mechanism from the dipolar interaction with protons.

Key words: ¹¹³Cd NMR, Polyaminocarboxylate-Cadmium complexes

宋瑞方, 毛友钢, 丁继贞. 三种胺羧配合物的¹¹³Cd NMR研究[J]. 波谱学杂志, 1992, 9(1): 67-73.

Song Ruifang, Mao Yougang, Ding Jizhen. ¹¹³Cd NMR STUDIES OF THREE Cd-POLYAMINO-CARBOXYLIC ACID COMPLEXES[J]. Chinese Journal of Magnetic Resonance, 1992, 9(1): 67-73.

三种胺羧配合物的¹¹³Cd NMR研究

¹¹³Cd NMR STUDIES OF THREE Cd-POLYAMINO-CARBOXYLIC ACID COMPLEXES

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