Fluorescence spectral detection of copper(II), mercury(II) and zinc(II) based on a multifunctional peptide-based sensor

IF 1.1 4区化学 Q3 SPECTROSCOPY

Spectroscopy Letters Pub Date : 2022-07-21 DOI:10.1080/00387010.2022.2101477

Lianshun Zhang, Shuaibing Yu, Lei Gao, Wei-Wei Meng, Chenfei Fu, Lianzhi Li

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引用次数: 1

Abstract

Abstract A fluorescence peptide-based sensor (Dansyl-His-Thr-Glu-His-Trp-NH2, D-P5) was synthesized by Fmoc solid phase peptide synthesis, using dansyl group as the fluorophore. The sensor exhibited different fluorescence responses and sensitive detections for copper(II), mercury(II) and zinc(II) ions as a multifunctional sensor. The detailed investigation suggested that the limits of detection were 37.6 nmol⋅L−1, 37.8 nmol⋅L−1 and 59.4 nmol⋅L−1 for copper(II), mercury(II) and zinc(II) ions, respectively, and the highly sensitive sensor was not influenced by other species. The sensor exhibited a strong binding ability to copper(II), mercury(II) and zinc(II) ions with the binding constants of 3.23 × 105 L⋅mol−1, 6.37 × 105 L⋅mol−1 and 6.0 × 104 L⋅mol−1, respectively. The binding stoichiometries of the sensor to copper(II), mercury(II) and zinc(II) ions measured by Job's plot were all 1:1. Furthermore, The sensor has been successfully used for the detections of copper(II), mercury(II) and zinc(II) in actual water samples.

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基于多功能肽传感器的铜（II）、汞（II）和锌（II）的荧光光谱检测

摘要采用Fmoc固相肽合成技术，以丹酚基为荧光团，合成了一种基于荧光肽的传感器(dansyl - his - thr - glu - his - trp - nh2, D-P5)。作为一种多功能传感器，该传感器对铜(II)、汞(II)和锌(II)离子具有不同的荧光响应和灵敏的检测。结果表明，该传感器对铜(II)、汞(II)和锌(II)离子的检出限分别为37.6、37.8和59.4 nmol·L−1，灵敏度高，不受其他物质的影响。该传感器对铜(II)、汞(II)和锌(II)离子具有较强的结合能力，结合常数分别为3.23 × 105 L⋅mol−1、6.37 × 105 L⋅mol−1和6.0 × 104 L⋅mol−1。通过Job’s plot测得传感器与铜(II)、汞(II)和锌(II)离子的结合化学计量均为1:1。此外，该传感器已成功用于实际水样中铜(II)、汞(II)和锌(II)的检测。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Spectroscopy Letters 物理-光谱学

CiteScore

2.90

自引率

5.90%

发文量

审稿时长

1.3 months

期刊介绍： Spectroscopy Letters provides vital coverage of all types of spectroscopy across all the disciplines where they are used—including novel work in fundamental spectroscopy, applications, diagnostics and instrumentation. The audience is intended to be all practicing spectroscopists across all scientific (and some engineering) disciplines, including: physics, chemistry, biology, instrumentation science, and pharmaceutical science.