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A novel ratiometric fluorescent and colorimetric sensor based on a 1,8-naphthalimide derivative for nanomolar Cu2+ sensing: smartphone and food applications
Analyst ( IF 4.2 ) Pub Date : 2022-05-10 , DOI: 10.1039/d2an00537a
Sukriye Nihan Karuk Elmas 1 , Fatma Nur Arslan 1 , Duygu Aydin 1
Affiliation  

A novel 1,8-naphthalimide-based chemical sensor 3-((2-(2-butyl-1,3-dioxo-2,3-dihydro-1H-benzo[de]isoquinoline-6-yl)hydrazone-o)methyl)-4-hydroxy-[1,1-biphenyl]-4-carbonitrile (BUDIN) with ratiometric fluorescence behavior, as well as “naked-eye” response was developed for the sensitive and specific determination of Cu2+ at nanomolar levels. With the addition of different amounts of Cu2+, the emission of BUDIN varied continually, leading to colour changes from yellow to blue (λem = 532 nm to 462 nm) due to intra-ligand charge transfer (ILCT) and metal–ligand charge transfer (MCLT). BUDIN can detect Cu2+ quantitatively with a detection limit of 17 nM. Job's plot, MALDI TOF MS and TOF MS findings revealed that the binding stoichiometry of BUDIN and Cu2+ was 2 : 1. Furthermore, the theoretical computation data strongly supported the optical response of BUDIN toward Cu2+. Smartphone digital imaging studies proved that BUDIN can be utilized as an outstanding chemical sensor for the on-site detection of Cu2+ without the need for sophisticated equipment, with a detection limit of 17.8 μM. The findings also presented that BUDIN is a very effective chemosensor for Cu2+ in real food samples with quite a simple operation.

中文翻译:

一种基于 1,8-萘酰亚胺衍生物的新型比率荧光和比色传感器,用于纳摩尔 Cu2+ 传感:智能手机和食品应用

一种新型 1,8-萘酰亚胺基化学传感器 3-((2-(2-butyl-1,3-dioxo-2,3-dihydro-1 H - benzo[ de ]isoquinoline-6-yl)hydrazone-o )甲基)-4-羟基-[1,1-联苯]-4-甲腈 ( BUDIN ) 具有比率荧光行为和“肉眼”响应,用于灵敏和特异地测定纳摩尔浓度的 Cu 2+水平。随着不同量的 Cu 2+的添加, BUDIN的发射不断变化,由于配体内电荷转移 (ILCT) 和金属配体,导致颜色从黄色变为蓝色(λ em = 532 nm 至 462 nm)电荷转移(MCLT)。BUDIN可以检测Cu 2+定量检测限为 17 nM。Job's plot、MALDI TOF MS和TOF MS结果表明BUDIN和Cu 2+的结合化学计量比为2:1。此外,理论计算数据有力地支持了BUDIN对Cu 2+的光学响应。智能手机数字成像研究证明,BUDIN可用作现场检测 Cu 2+的出色化学传感器,无需复杂的设备,检测限为 17.8 μM。研究结果还表明,BUDIN是一种非常有效的化学传感器,用于检测实际食品样品中的 Cu 2+,操作非常简单。
更新日期:2022-05-10
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