A Novel Schiff Base‐Modified Dialdehyde Cellulose‐Based Fluorescent Probe for Al3+ and Its Application in Environmental Analysis. Issue 2 (9th November 2021) - Meng, Zhiyuan
Abstract: Cellulose is the most abundant natural polymer with good biodegradability and biocompatibility. In this paper, a novel fluorescent probe DAC‐SD‐NA for aluminum (Al 3+ ) detection is successfully synthesized based on dialdehyde cellulose (DAC). DAC‐SD‐NA exhibited a remarkable "turn‐on" fluorescence response to Al 3+ in a wide pH range, and the fluorescence color of DAC‐SD‐NA solution turned from colorless to bright blue at the presence of Al 3+ . The detection limit for Al 3+ is computed to be 6.06×10 −7 m . The reaction mechanism of DAC‐SD‐NA towards Al 3+ is confirmed by Job's plot, X‐ray photoelectron spectroscopy, and density functional theory (DFT) calculations. In view of DAC‐SD‐NA exhibited good sensitivity and selectivity, it is applied to detect Al 3+ in real water. What's more, DAC‐SD‐NA‐loaded fluorescent hydrogel can serve as a convenient tool for the detection of Al 3+ . Abstract : In this work, a Schiff base‐modified dialdehyde cellulose‐based fluorescent probe DAC‐SD‐NA is designed and synthesized, which can detect aluminum (Al 3+ ) with high sensitivity and selectivity over a wide pH range (5–10). DAC‐SD‐NA has been successfully applied to the detection of Al 3+ in environmental water. Additionally, DAC‐SD‐NA fluorescent hydrogel is prepared for the detection of Al 3+ .