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首页> 外文期刊>The Analyst: The Analytical Journal of the Royal Society of Chemistry: A Monthly International Publication Dealing with All Branches of Analytical Chemistry >Complexation of silver and co-recovered metals with novel aza-crown ether macrocycles by electrospray ionization mass spectrometry
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Complexation of silver and co-recovered metals with novel aza-crown ether macrocycles by electrospray ionization mass spectrometry

机译：银和共回收金属与新型氮杂-冠醚大环的电喷雾电离质谱分析

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摘要

Electrospray ionization mass spectrometry (ESI-MS) is used to evaluate the metal binding selectivities of an array of novel caged macrocycles for silver,gold,copper,nickel,zinc,iron,lead,manganese and alkali metal ions.It is found that five of the new compounds display silver selectivity,and their relative affinities for various metals depend on the type,number,and arrangement of heteroatoms (N,O),the cavity size,and the presence of aromatic substituents.Alkali metal cation binding studies are used to evaluate the size-selectvitities of the cavities of the macrocycles.Electronic structure calculation by B3LYP density function theory methods were used to model the metal complexes.The presence of nitrogen atoms in the macrocyclic ring is essential for silver selectivity over other transition metals and alkali metal ions,and the presence of aromatic groups also enhances silver avidity.Macrocycle 3,a triaza-18-crown-6 analog- modified with two phenyl groups and a cage group,is capable of selective extranction of Ag~+ from aqueous solutions in the presence of other transition metal ions and the most common alkali and alkaline earth metal ions.
机译：电喷雾电离质谱法（ESI-MS）用于评估一系列新型笼形大环化合物对银，金，铜，镍，锌，铁，铅，锰和碱金属离子的金属结合选择性，发现其中五个的新化合物具有银选择性，它们对各种金属的相对亲和力取决于杂原子（N，O）的类型，数量和排列，空穴的大小以及芳族取代基的存在。使用了碱金属阳离子结合研究通过B3LYP密度函数理论方法计算电子结构，以金属配合物为模型，大环中存在氮原子对于银对其他过渡金属和碱的选择性至关重要。金属离子，以及芳香族基团的存在也增强了银的亲合力。Macrocycle3，由两个苯基和一个笼基团修饰的triaza-18-crown-6类似物，能够在存在其他过渡金属离子以及最常见的碱金属和碱土金属离子的情况下，从水溶液中选择性引出Ag〜+。

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