INTERACTIONS OF H+ AND CU(II) IONS WITH POLY(ADENYLIC ACID) - STUDY BY FACTOR-ANALYSIS

被引：39

作者：

CASASSAS, E ^{[1
]}

TAULER, R ^{[1
]}

MARQUES, I ^{[1
]}

机构：

[1] UNIV BARCELONA,DEPT ANALYT CHEM,DIAGONAL 647,E-08028 BARCELONA,SPAIN

来源：

MACROMOLECULES | 1994年 / 27卷 / 07期

关键词：

D O I：

10.1021/ma00085a010

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The interactions of H+ and Cu(II) ions with poly(adenylic acid) (polyA) are investigated using different factor analysis techniques. From the changes in the ultraviolet and circular dichroism absorption spectra obtained in the course of spectroscopic acid-base titrations of poly(adenylic acid) solutions containing different amounts of Cu(II) ion, the unitary spectra, the concentrations, and the stabilities of the macromolecular species detected are estimated. Four spectroscopically different species are detected for poly(adenylic acid) in the pH interval 1.5-6.8. Three of them are different conformations of the protonated form of polyA, and the other is the unprotonated form of polyA. One new species is detected in the presence of Cu(II) ion.

引用

页码：1729 / 1737

页数：9

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