Copper(ii) complexes of bis(amino amide) ligands: effect of changes in the amino acid residue
作者:Inés Martí、Armando Ferrer、Jorge Escorihuela、M. Isabel Burguete、Santiago V. Luis
DOI:10.1039/c2dt12459a
日期:——
A family of ligands derived from bis(amino amides) containing aliphatic spacers has been prepared, and their protonation and stability constants for the formation of Cu2+ complexes have been determined potentiometrically. Important differences are associated to both the length of the aliphatic spacer and the nature of the side chains derived from the amino acid. In general, ligands containing aliphatic
已经制备了衍生自含脂肪族间隔基的双(氨基酰胺)的配体族,并且已经用电位法确定了其形成Cu 2+配合物的质子化和稳定性常数。重要的差异与脂族间隔基的长度和衍生自氨基酸的侧链的性质有关。通常,含脂族侧链的配体显示出较高的碱度以及对Cu 2+的稳定性常数。同样,当降低由相应侧链引起的位阻时,碱度和稳定性常数趋于增加。FT-IR,UV-vis和ESI-MS用于分析形态图中检测到的复杂物种。UV-vis研究表明铜(II)配合物存在不同的配位环境。在某些情况下可以形成具有不同化学计量的配合物。ESI-MS实验清楚地突出了这一点。