A Novel Schiff Base‐Modified Dialdehyde Cellulose‐Based Fluorescent Probe for Al<sup>3+</sup> and Its Application in Environmental Analysis
Zhiyuan Meng, Jie Yin, Mingxin Li, Yueyin Liang, Xiaoyuan Wang, Yangmei Wu, Jiali Kou, Zhonglong Wang, Yiqin Yang
Abstract
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+ .