A Facile Strategy for the Preparation of Carboxymethylcellulose‐Derived Polymer Dots and Their Application to Detect Tetracyclines. Issue 22 (23rd September 2021)

• Record Type: Journal Article
• Authors: Zhang, Siyu; Wang, Ying; Yang, Guang
• Is Part Of: Macromolecular chemistry and physics. Volume 222:Issue 22(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-09-23
• Subjects: carboxymethylcellulose -- fluorescent sensors -- polymer dots -- tetracyclines; Polymers -- Periodicals; Polymerization -- Periodicals; Synthetic products -- Periodicals; Macromolecules -- Periodicals; 547.7
• DOI: 10.1002/macp.202100267
• Languages: English
• ISSNs: 1022-1352

Abstract

Abstract: Developing nonconjugated fluorescent polymer dots based on cellulose materials through a simple and economical method is of high value for sensing or imaging. However, great challenges are still being suffered. Herein, strong blue‐green emission water‐soluble cellulose polymer dots (CPDs) are synthesized with excellent stability using carboxymethyl cellulose (CMC) and citric acid (CA) as precursors via a mild reaction and facile synthesis process. Near‐spherical nanoparticles with an average size of approximately 11.3 nm and quantum yield of 11.5% are obtained. Importantly, CPDs can be utilized as an excellent fluorescent probe for the detection of tetracyclines (TCs) in aqueous solutions through fluorescence quenching via the inner filter effect. The detection limit for fluorescent CPDs for TC detection is found to be as low as 4.1 × 10 ‐9 m, and two good linear relationships for TC concentration ranging from 51.8 × 10 ‐9 to 256.8 × 10 ‐9 m ( R 2 = 0.996) and 0 × 10 ‐6 to 15.3 × 10 ‐6 m ( R 2 = 0.997) are obtained. Finally, the fluorescent CPD fluorescent probe is successfully utilized to detect TC in real samples, including tap water, milk, and river water. Abstract : This study describes a facile strategy to synthesize carboxymethyl cellulose polymer dots (CPDs), which use ethylenediamine‐modified cellulose and citric acid (CA) via Maillard reaction in an aqueous medium at room temperature. The as‐prepared fluorescent CPDs can be applied as a turn‐off chemosensor for the detection of tetracyclines with high sensitivity and selectivity in an aqueous solution.