Mixed-ligand complexes of copper(II) with 1, 10'-Phenanthroline and amino acids

被引：0

作者：

Madden, Waleska ^{[1
]}

Del Carpio, Edgar ^{[2
]}

Hernandez, Lino ^{[1
]}

Echevarria, Lorenzo ^{[1
]}

Lubes, Vito ^{[1
]}

机构：

[1] Univ Simon Bolivar USB, Dept Quim, Apartado 89000, Caracas 1080, Venezuela

[2] Univ Cent Venezuela UCV, Unidad Quim Med, Fac Farm Escuela, Caracas, Venezuela

来源：

PHYSICS AND CHEMISTRY OF LIQUIDS | 2022年 / 60卷 / 05期

关键词：

Copper(II); 1; 10'-phenanthroline; amino acids; potentiometric studies; absorption spectra; CD spectra; SPECTRUM-STRUCTURE CORRELATION; VISIBLE ABSORPTION-SPECTRA; CIRCULAR-DICHROISM; TERNARY COMPLEXES; CRYSTAL-STRUCTURE; CU(II) COMPLEXES; 1,10-PHENANTHROLINE; COORDINATION; DERIVATIVES; SPECIATION;

D O I：

10.1080/00319104.2022.2053975

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The speciation of the ternary systems formed by copper(II), 1,10'-Phenanthroline (Phen) and the amino acids: Histidine (HHis, HL), Arginine (HArg, HL), Lysine (HLys, HL), Aspartic acid (H(2)Asp, H2L), Glutamic acid (H(2)Glu, H2L) and Tyrosine (H(2)Tyr, H2L) was studied by means of emf(H) electromotive force measurements in aqueous solution at 25 degrees C using 1.0 mol.dm(-3) KNO3 as the ionic medium. The data obtained through potentiometric measurements were analysed using the computer program generalised least-squares LETAGROP. The species distribution diagrams as a function of pH were briefly discussed. The stability of the ternary complexes was compared with the corresponding one of the binary complexes in terms of increment log K and % R.S. Spectrophotometric studies, UV-vis absorption and circular dichroism (CD), were employed to analyse the coordination modes of the ligands, the adopted geometry, and the stability of the major ternary complexes present in solution

引用

页码：786 / 807

页数：22

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