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一种简单的 S-S 桥联二聚席夫碱的实验与理论研究：用于纳摩尔级检测铁和铝离子的选择性发色荧光化学传感器及其多种应用

Experimental and Theoretical Studies on a Simple S-S-Bridged Dimeric Schiff Base: Selective Chromo-Fluorogenic Chemosensor for Nanomolar Detection of Fe & Al Ions and Its Varied Applications.

作者信息

Immanuel David Charles, Bhuvanesh Nanjan, Jayaraj Haritha, Thamilselvan Annadurai, Parimala Devi Duraisamy, Abiram Angamuthu, Prabhu Jeyaraj, Nandhakumar Raju

机构信息

Department of Chemistry, Karunya Institute of Technology and Sciences (Deemed-to-be University), Karunya Nagar, Coimbatore 641 114, India.

Electro Organic-Division, Central Electrochemical Research Institute (CSIR-CECRI), Karaikudi 630 003, India.

出版信息

ACS Omega. 2020 Feb 4;5(6):3055-3072. doi: 10.1021/acsomega.9b04294. eCollection 2020 Feb 18.

DOI:10.1021/acsomega.9b04294
PMID:32095729
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7033979/
Abstract

A simple S-S (disulfide)-bridged dimeric Schiff base probe, , has been designed, synthesized, and successfully characterized for the specific recognition of Al and Fe ions as fluorometric and colorimetric "turn-on" responses in a dimethylformamide (DMF)-HO solvent mixture, respectively. The probe and each metal ion bind through a 1:1 complex stoichiometry, and the plausible sensing mechanism is proposed based on the inhibition of the photoinduced electron transfer process (PET). The reversible chemosensor showed high sensitivity toward Al and Fe ions, which was analyzed by fluorescence and UV-vis spectroscopy techniques up to nanomolar detection limits, 38.26 × 10 and 17.54 × 10 M, respectively. These experimental details were advocated by density functional theory (DFT) calculations. The practical utility of the chemosensor was further demonstrated in electrochemical sensing, in vitro antimicrobial activity, molecular logic gate function, and quantification of the trace amount of Al and Fe ions in real water samples.

摘要

一种简单的S-S（二硫键）桥连二聚体席夫碱探针，已被设计、合成并成功表征，用于分别在二甲基甲酰胺（DMF）-水溶剂混合物中作为荧光和比色“开启”响应来特异性识别铝离子和铁离子。探针与每种金属离子以1:1的络合化学计量比结合，并基于光致电子转移过程（PET）的抑制提出了合理的传感机制。可逆化学传感器对铝离子和铁离子表现出高灵敏度，通过荧光和紫外可见光谱技术分析，检测限分别高达纳摩尔级，即38.26×10⁻⁹ M和17.54×10⁻⁹ M。这些实验细节得到了密度泛函理论（DFT）计算的支持。化学传感器在电化学传感、体外抗菌活性、分子逻辑门功能以及实际水样中痕量铝离子和铁离子的定量分析方面进一步证明了其实用性。

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