L-Lysine-derived fluorescent salicylidenes: synthesis, characterization and turn-off Cu2+ and Co2+ selective cation sensing

IF 2.2 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Journal of the Iranian Chemical Society Pub Date : 2024-06-19 DOI:10.1007/s13738-024-03052-4

Soumaya Agren, Jamal El Haskouri, Emmanuel Beyou, Mohamed Hassen V Baouab

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Abstract

Two L-lysine-derived salicylidene ligands have been synthesized under ultrasound irradiations and characterized by several spectroscopic techniques. Both ligands exhibited a blue fluorescence emission in ethanolic solutions. (S, E)-3-Amino-7-((2-hydroxybenzylidene) amino) heptanoic acid (A) and (S, E)-3-amino-7-((4-chloro-2-hydroxybenzylidene) amino) heptanoic acid (B) showed a turn-off sensing of Cu²⁺ and Co²⁺ cations, respectively, over several tested transition metal cations such as Fe²⁺, Zn²⁺, Cr³⁺, Co²⁺, Ni²⁺ and Cu²⁺ in aqueous media. The ability of both tested L-lysine-derived ligands (A) and (B) to distinguish Cu²⁺ and CO²⁺, respectively, has been verified by optical studies, showing new absorption bands around 304 and 391 nm for (A)-Cu²⁺ and a new band around 455 nm for (B)-Co²⁺ along with the disappearance of the original bands supporting thereby the noticed Turn–Off results.

Graphical abstract

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由 L-赖氨酸衍生的荧光水杨醛：合成、表征和关断 Cu2+ 和 Co2+ 选择性阳离子传感

在超声辐照下合成了两种由 L-赖氨酸衍生的水杨醛配体，并利用多种光谱技术对其进行了表征。这两种配体在乙醇溶液中都发出蓝色荧光。(S，E)-3-氨基-7-((2-羟基亚苄基)氨基)庚酸（A）和(S，E)-3-氨基-7-((4-氯-2-羟基亚苄基)氨基)庚酸（B）显示出对 Cu2+ 和 Co2+ 阳离子的关断感应、在水介质中分别比几种测试的过渡金属阳离子（如 Fe2+、Zn2+、Cr3+、Co2+、Ni2+ 和 Cu2+）更敏感。通过光学研究验证了两种测试的 L-赖氨酸衍生配体（A）和（B）分别区分 Cu2+ 和 CO2+ 的能力，结果表明（A）-Cu2+ 在 304 和 391 纳米附近出现了新的吸收带，（B）-Co2+ 在 455 纳米附近出现了新的吸收带，同时原来的吸收带消失了，从而支持了注意到的关断结果。

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来源期刊

Journal of the Iranian Chemical Society 化学-化学综合

CiteScore

4.40

自引率

8.30%

发文量

230

审稿时长

5.6 months

期刊介绍： JICS is an international journal covering general fields of chemistry. JICS welcomes high quality original papers in English dealing with experimental, theoretical and applied research related to all branches of chemistry. These include the fields of analytical, inorganic, organic and physical chemistry as well as the chemical biology area. Review articles discussing specific areas of chemistry of current chemical or biological importance are also published. JICS ensures visibility of your research results to a worldwide audience in science. You are kindly invited to submit your manuscript to the Editor-in-Chief or Regional Editor. All contributions in the form of original papers or short communications will be peer reviewed and published free of charge after acceptance.