期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 240, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2023.124426
关键词
Metal-organic frameworks; ZIF-8; Cellulose; Chromium; Fluorescence sensor; Antimicrobial activity
A cellulose-based fluorescent probe (Cel-Nap) was developed for detecting Cr(VI), with a low LOD of 1.07 μm in the range of 0.33 x 10-5-3.22 x 10-5 M. The fluorescence and antibacterial properties of UiO-66-Cel-Nap and ZIF-8-Cel-Nap materials were investigated, with ZIF-8-based materials exhibiting better antimicrobial properties. Materials containing Ag+ were found to be more effective against bacteria than those containing AgNPs, and ZIF-8-Cel-Nap-Ag+ was the most effective material with a significant antibacterial effect against E. coli at a MIC value of 0.0024 mg/mL.
It is crucial to detect toxic chromium ions quickly, reliably, sensitively and at low concentrations. In recent years, fluorescence-based methods have been developed for the rapid detection and determination of toxic ions such as chromium. In present work, we focused on the development of a cellulose-based fluorescent probe (Cel-Nap) for the determination of Cr(VI). The fluorescent probe bearing the 1,8-naphthalimide group displayed a low LOD of 1.07 mu M for Cr(VI) in the working range of 0.33 x 10- 5-3.22 x 10-5 M. The fluorescence and antibacterial properties of UiO-66-Cel-Nap and ZIF-8-Cel-Nap materials prepared by encapsulating Cel-Nap with 2 different MOF types (UiO-66 and ZIF-8) were investigated. While it was found that ZIF-8-based materials had better antimicrobial properties compared to those of UiO-66, it was determined that materials containing Ag+ were more effective against microbial than those containing AgNPs. It was found that the most effective material was ZIF-8-Cel-Nap-Ag+ and it had a significant antibacterial effect against E. coli at a MIC value of 0.0024 mg/mL.
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