Iron(III) Complexation by New Aminocarboxylate Chelators − Thermodynamic and Kinetic Studies
作者:Guy Serratrice、Jean-Baptiste Galey、Eric Saint Aman、Jacqueline Dumats
DOI:10.1002/1099-0682(200102)2001:2<471::aid-ejic471>3.0.co;2-a
日期:2001.2
complexation of FeIII by new tetradentate and pentadentate aminocarboxylate chelators, designed to protect cells against iron-catalysed oxidative damage, was investigated. Ferric iron complexes of N,N′-bis(3,4,5-trimethoxybenzyl)ethylenediamine-N,N′-diacetic acid (L1), N,N′-dibenzylethylenediamine-N,N′-diacetic acid (L2) and [N-(2-hydroxybenzyl)-N′-benzylethylenediamine-N,N′-diacetic acid] (L3) have been characterized
研究了新型四齿和五齿氨基羧酸螯合剂与 FeIII 的络合,旨在保护细胞免受铁催化的氧化损伤。N,N'-双(3,4,5-三甲氧基苄基)乙二胺-N,N'-二乙酸(L1)、N,N'-二苄基乙二胺-N,N'-二乙酸(L2)和[N-(2-羟基苄基)-N'-苄基乙二胺-N,N'-二乙酸] (L3) 已通过电位、紫外/可见分光光度法和循环伏安测量在水溶液中表征。还研究了母体配体乙二胺-N,N'-二乙酸 (L4)。正如预期的那样,与 L1 或 L2 相比,L3 中硬酚盐供体基团的存在显着增强了对铁的亲和力,同时降低了 FeIII/FeII 氧化还原对的潜力。动力学研究提供了与三价铁配合物与 L3 的形成和解离相关的动力学速率常数。结果揭示了快速的 FeIII 吸收,这是此类配体生物应用的有利特征。总体而言,这些结果证明了使用此类配体来保护生物组织免受氧化应激的相关性。