Fluorescence of metal-ligand complexes of mono- and di-substituted naphthalene derivatives
Fluorescence of metal-ligand complexes of mono- and di-substituted naphthalene derivatives
复制标题
DOI：
10.1007/s10895-005-2527-1
复制
发表时间：
2005-03-01
影响因子：
2.7
通讯作者：
Warner, IM
中科院分区：
文献类型：
--
作者：
Rodríguez-Cáceres, MI;Agbaria, RA;Warner, IM
在这项工作中，金属离子配合物的几个萘衍生物进行了研究。选择不同的工作pH值：2.5用于与Zr（IV）的络合物，4.0用于与Fe（III）的络合物，5.0用于与Al（III）的络合物，以及7.5用于与Cu（II）的络合物。用Benesi-Hildebrand法确定了除两个配合物外的所有配合物的化学计量比为1：1，并计算了稳定常数。所有萘衍生物与Cu（II）和Fe（III）之间的配合物均显示荧光猝灭。在Al（III）的情况下，所有络合物提供增强的荧光。对于Zr（IV），只有与3-羟基-2-萘甲酸的络合物提供增强的荧光。分析了萘衍生物的稳定常数随取代基的变化规律。可以得出结论，Cu（II）对单取代衍生物显示出最大的结合亲和力。然而，Al（III）和Zr（IV）对二取代衍生物产生更大的选择性。铁（III）没有表现出与任何萘衍生物的特异性结合。
In this work, metal ion complexes for several naphthalene derivatives have been investigated. Different working pH values were chosen: 2.5 for complexes with Zr(IV), 4.0 for complexes with Fe(III), 5.0 for complexes with Al(III), and 7.5 for complexes with Cu(II). A stoichiometry of 1:1 for all complexes except two has been established by use of the Benesi-Hildebrand method and the stability constants have been calculated. All complexes between naphthalene derivatives and Cu(II) and Fe(III) show fluorescence quenching. In the case of Al(III), all complexes provided enhanced fluorescence. For Zr(IV), only the complex with 3-hydroxy-2-naphthoic acid provided enhanced fluorescence. The value of the stability constants as a function of the substituents of naphthalene derivatives has been analyzed. One can conclude that Cu(II) showed the largest binding affinity for the mono-substituted derivatives. However, Al(III) and Zr(IV) produced greater selectivity for the di-substituted derivatives. Iron(III) showed no specific binding with any of the naphthalene derivatives.