A fluorescent probe for Gallium(Ⅲ) ions based on 2-hydroxy-1-naphthaldehyde and L-serine. (April 2020)

• Record Type: Journal Article
• Authors: Yan, Liqiang; Zhang, Shiqing; Xie, Ya; Lei, Chenghong
• Is Part Of: Dyes and pigments. Volume 175(2020)
• Publication Date: 2020-04
• Subjects: Fluorescence probe -- Naphthalene derivative -- l-serine -- Gallium ions; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2020.108190
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: A simple fluorescence probe for Ga 3+ has been designed and prepared by Schiff base reaction between 2-hydroxy-1-naphthaldehyde and l -serine. This probe has been confirmed to effectively monitor Ga 3+ with high specificity over other metal ions and common anions according to the fluorescence change. The mass spectra (ESI-MS) and Job's plot proved evidences of the complex formation with a 1:1 stoichiometry between the probe and Ga 3+ . The association constant (K) and limit of detection (LOD) were calculated as 7.63 × 10 3 M −1 and 0.11 μM, respectively. Furthermore, combined with the density functional theory (DFT) calculation and the fluorescence lifetime change, the detection mechanism of the probe to Ga 3+ was proposed. The suppression of the photo-induced electron transfer (PET) process and the excited-state intramolecular proton transfer (ESIPT) process is responsible for the fluorescence enhancement of this probe. Additionally, the probe showed good cell permeability and could be also capable of detecting Ga 3+ in living cells. Graphical abstract: A simple fluorescence probe for Ga 3+ based on PET and ESIPT mechanisms was developed by Schiff base reaction between naphthalene and l -serine. Image 1 Highlights: The simple synthesis process of the probe by Schiff base reaction. Water-soluble l -serine was used as receptor unit. Highly specific response to Ga 3+ in 1 min. Application in cellar imaging.