激光散射法研究DNA-阳离子络合物的生成过程(Ⅱ)

高等学校化学学报 ›› 1987, Vol. 8 ›› Issue (3): 277.

激光散射法研究DNA-阳离子络合物的生成过程(Ⅱ)

左矩, 张敏, 杨映松

南开大学化学系

收稿日期:1985-08-12 出版日期:1987-03-24 发布日期:1987-03-24

The Formation of Cation-Complex DNA Studied by Laser Scattering (Ⅱ)

Zuo Ju, Zhang Min, Yang Yingsong

Department of Chemistry, Nankai University, Tianjin

Received:1985-08-12 Online:1987-03-24 Published:1987-03-24

摘要/Abstract

摘要： 本文用激光散射法研究了DNA与Mn²⁺、Ni²⁺、Cu²⁺三种二价金属离子络合沉淀反应动力学过程及影响同素,并求得了反应活化能、络合比、反应级数等。由活化能值推知反应体系络合反应活性顺序为:Mn²⁺<Ni²⁺<Gu²⁺,与配位场理论结果一致。证实了Na⁺等小离子的存在对沉淀生成情况影响确实很大。本文对络合沉淀机理也作了一定的分析。

Abstract: The kinetics and the influence factors of complex precipitation of DNA with Mn⁺⁺, Ni⁺⁺and Cu⁺⁺were studied by the laser scattering. The influence factors are M/P, concentration, pHand t(℃) etc. The experiments obtaining the active energies of the reaction, the complex ratio and the reaction order were also done. And the active order which was derived from active energies for complex precipitation is Mn⁺⁺<Ni⁺⁺<Cu⁺⁺, which is accord with the result from CFT. The presence of small ions Na⁺, K⁺, etc. plays, indeed, a important role in the formation of complex precipitation. The mechanism of complex precipitation was also analysed.

TrendMD:

左矩, 张敏, 杨映松. 激光散射法研究DNA-阳离子络合物的生成过程(Ⅱ). 高等学校化学学报, 1987, 8(3): 277.

Zuo Ju, Zhang Min, Yang Yingsong . The Formation of Cation-Complex DNA Studied by Laser Scattering (Ⅱ). Chem. J. Chinese Universities, 1987, 8(3): 277.