A naphthalimide functionalized chitosan-based fluorescent probe for specific detection and efficient adsorption of Cu2

Zhiyuan Meng; Zhonglong Wang; Yueyin Liang; Guocheng Zhou; Xinyan Li; Xu Xu; Yiqin Yang; Shifa Wang

doi:10.1016/j.ijbiomac.2023.124261

A naphthalimide functionalized chitosan-based fluorescent probe for specific detection and efficient adsorption of Cu²

Int J Biol Macromol. 2023 Jun 1:239:124261. doi: 10.1016/j.ijbiomac.2023.124261. Epub 2023 Mar 30.

Authors

Zhiyuan Meng¹, Zhonglong Wang¹, Yueyin Liang¹, Guocheng Zhou¹, Xinyan Li¹, Xu Xu¹, Yiqin Yang², Shifa Wang³

Affiliations

¹ Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Chemical Engineering, College of Light Industry and Food, Nanjing Forestry University, Nanjing 210037, China.
² Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Chemical Engineering, College of Light Industry and Food, Nanjing Forestry University, Nanjing 210037, China. Electronic address: wsfyyq@njfu.edu.cn.
³ Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Chemical Engineering, College of Light Industry and Food, Nanjing Forestry University, Nanjing 210037, China. Electronic address: wangshifa65@163.com.

PMID: 37003383
DOI: 10.1016/j.ijbiomac.2023.124261

Abstract

As one of the most abundant metal ions, Cu²⁺ has turned into a great threat to human health and the natural environment due to its widely utilized in various industries. In this paper, a chitosan-based fluorescent probe CTS-NA-HY for detection and adsorption of Cu²⁺ was rationally prepared. CTS-NA-HY exhibited a specific "turn off" fluorescence response to Cu²⁺ and the fluorescence color changed from bright yellow to colorless. It possessed satisfactory detection performance to Cu²⁺ including good selectivity and anti-interference, low detection limit (29 nM) and wide pH range (4-9). The detection mechanism was confirmed by Job's plot, X-ray photoelectron spectroscopy, FT-IR and ¹H NMR analysis. Additionally, the probe CTS-NA-HY was capacity of determining Cu²⁺ in environmental water and soil samples. Besides, CTS-NA-HY-based hydrogel could also remove Cu²⁺ in aqueous solution effectively, which the ability of adsorption was greatly improved compared with original chitosan hydrogel.

Keywords: Chitosan; Detection and adsorption; Fluorescent probe.

MeSH terms

Adsorption
Chitosan* / chemistry
Copper / chemistry
Fluorescent Dyes / chemistry
Humans
Naphthalimides* / chemistry
Spectrometry, Fluorescence / methods
Spectroscopy, Fourier Transform Infrared
Water / chemistry

Substances

Naphthalimides
Copper
Fluorescent Dyes
Chitosan
Water