Abstract
Hypochlorite (ClO) plays an important role in the human immune and environmental systems, so it is essential to develop an accurate and highly selective approach for rapid recognition of ClO. Herein, a naphthalimide derivative functionalized cellulose acetate (CA)-based fluorescent probe CA-NA-DNPH was prepared for specific detection of ClO. This probe displayed a “off-on” fluorescence change towards ClO, and the fluorescence color varied from colorless to brilliant green. CA-NA-DNPH presented eminent properties to ClO including fast response (3 min), high sensitivity (98 nM), wide pH range (3−12), and good selectivity. The recognition mechanism of CA-NA-DNPH to ClO was verified by high resolution mass spectrometry (HRMS) analysis. In addition, CA-NA-DNPH was utilized to monitor the ClO concentration in tap water and swimming pool water, and was also used to recognize ClO in living cells and zebrafish. Furthermore, the CA-NA-DNPH-based fluorescence nanofibrous membrane was successfully prepared by electrospinning technique, which provided a simple and convenient tool for detection of ClO.
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