A flavonol-labelled cellulose fluorescent probe combined with composite fluorescent film imaging and smartphone technology for the detection of Fe 3

• Published in: International journal of biological macromolecules 2024-01, Vol.259 (Pt 2), p.129373
• Main Authors: Wu, Xiaoxiao, Yuan, Xushuo, Liang, Entong, Liu, Li, Lin, Yanfei, Xie, Linkun, Chai, Xijuan, Xu, Kaimeng, Du, Guanben, Zhang, Lianpeng
• Format: Article
• Language: English
• ISSN: 1879-0003

Fe is one of the most widely distributed and abundant elements on earth. Realizing efficient and real-time monitoring of Fe is of great significance for the natural environment and the health of living organisms. In this paper, a flavonol-labelled cellulose-based fluorescent probe (ACHM) was synthesized by using dialdehyde cellulose (DAC) as the backbone and combining with flavonol derivatives (AHM - 1). The mechanism of recognizing Fe was verified by characterizing the structure of ACHM by NMR, HRMS (High Resolution Mass Spectrometry), FTIR (Fourier Transform Infrared Spectroscopy), XRD (X-ray Diffraction), TG (Thermogravimetry) and SEM (Scanning Electron Microscopy). The H O solution of the probe ACHM showed good fluorescence properties. It has quenching fluorescence properties for Fe , with a low limit of detection (LOD) of 0.10 μM and a fast response time of only 20 s. In addition, in order to expand the application range of the probe, ACHM was prepared as a fluorescent composite film with an average tensile strength of 32.9 MPa and an average elongation at break of 3.39 %. It shows its superiority in mechanical properties. The probe also demonstrated its practical application value for detecting Fe in smartphone imaging applications.