期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 191, 期 -, 页码 1221-1227出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2021.09.165
关键词
N,S-CDs; kappa-Carrageenan; Chitosan; Fe3+ ion detection; Ascorbic acid
This study developed a highly sensitive and selective fluorescent probe for sequential detection of iron ion and ascorbic acid, demonstrating great potential for practical applications and reliable detection results.
This study develops a high sensitive and selective on-off-on fluorescent probe for sequential detection of iron ion (Fe3+) and ascorbic acid (AA) based on nitrogen and sulfur co-doped carbon dots (N, S-CDs), which were synthesized by using chitosan and kappa-carrageenan as raw materials through one-step hydrothermal protocol. The synthesized N,S-CDs possess particularly high quantum yield (QY = 59.31%), excellent stability and excitation dependent behavior, showing great potential for practical applications. Furthermore, N,S-CDs provided high selectivity and strong anti-interference to Fe3+ due to its fluorescence quenching performance, revealing a wide linear concentration range from 1 to 100 mu M for the detection of Fe3+ ion with an extremely low limit of detection of 57 nM, and presented reliable and accurate results in actual sample detection of Fe3+. The overall fluorescence quenching mechanism of N,S-CDs with Fe3+ was due to the formation of N,S-CDs/Fe3+ initiated to the aggregation and electron transfer of N,S-CDs, resulting in the static quenching of fluorescence. More interestingly, AA could reduce Fe3+ to Fe2+ and efficaciously recover the quenched fluorescence of N,S-CDs/Fe3+. N, S-CDs/Fe3+ as turn-on fluorescent probe was further applied for detecting AA in a linear range of 0.5-90 mu M with a detection limit of 38 nM.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据