波谱学杂志 ›› 1990, Vol. 7 ›› Issue (4): 433-438.

• 研究论文 • 上一篇    下一篇

新的水溶性13C NMR弛豫试剂的性质研究

石凤, 孝延文, 唐功本, 倪嘉缵   

  1. 中国科学院长春应用化学研究所
  • 收稿日期:1990-01-09 出版日期:1990-12-05 发布日期:2018-01-23

SUTDY OF PROPERTY OF NEW WATER-SOLUBLE 13C NMR RELAXATION REAGENT

Shi Feng, Xiao Yanwen, Tang Gongben, Ni Jiazan   

  1. Changchun Institute of Applied Chemistry, Academia Sinica
  • Received:1990-01-09 Online:1990-12-05 Published:2018-01-23

摘要: 合成了Gd3+与2,3-二羟基-对-二甲苯胺四乙酸(DPTA)的固体配合物,研究了该化合物作为水溶性13C NMR弛豫试剂的性质,证明该试剂对增强各种氨基酸(苏氨酸、半胱氨酸、精氨酸、组氨酸、色氨酸和抗坏血酸)季碳原子的谱峰强度是十分有效的。精氨酸的自旋-晶格弛豫时间(T1)测量表明,Gd-DPTA可使精氨酸分子中季碳T1缩短200倍以上,效果优于Gd-DTPA。

关键词: 13C NMR, 弛予试剂

Abstract: Soid complex of Gd3- with 2, 3-dihydroxy-p-xylylenf diaminotetraacetic acid (DPTA) was synthesized. Studies have been performed in which the above-mentioned complex was utilized as water-soluble paramagnetic relaxation reagent for 13C NMR spectrometry. Model compounds with which the reagent is effective include threonine, cysteine, arginine, histidine, tryptophan and ascorbic acid. It was shown that the reagent investigated can not only enhance the singal intensities for carbons not attached to hydrogen, but also suppress the nuclear Overhauser effect (NOE) for protonated carbons. Carbons-13 spin-lattice relaxation times (T1) of the arginine acid in the presence or absence of the relaxation reagents were measured. The results show that Gd-DPTA is more effective than Gd-DTPA as a carbon-13 relaxation reagent.

Key words: 13C NMR, Relaxation reagent