A carbon-dot-based dual-emission probe for ultrasensitive visual detection of copper ions. (15th November 2018)

• Record Type: Journal Article
• Authors: Kuang, Yunsuo; Chen, Linfeng; Lu, Jiahui; Tian, Xike; Yang, Chao; Li, Yong; Lu, Liqiang; Nie, Yulun
• Is Part Of: New journal of chemistry. Volume 42:Number 24(2018)
• Page Start: 19771
• Page End: 19778
• Publication Date: 2018-11-15
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c8nj04854a
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : In this work, we successfully developed an ultrasensitive dual-emission fluorescent sensor (CRB) for instant visual determination of Cu 2+ by modifying a Cu-sensitive rhodamine B derivative (RB) onto photostable carboxyl modified carbon dots (CDs). Abstract : In this work, we successfully developed an ultrasensitive dual-emission fluorescent sensor (CRB) for instant visual determination of Cu 2+ by modifying a Cu-sensitive rhodamine B derivative (RB) onto photostable carboxyl modified carbon dots (CDs). The RB moiety of the CRB was extremely sensitive to Cu 2+ and exhibited significant orange fluorescence in 1 second, while the blue CD moiety was stable to Cu 2+ . As a result, significant fluorescent color transformation from blue to orange could be observed in the presence of Cu 2+, which could be applied to rapid visualization of Cu 2+ . The CRB exhibited good selectivity and excellent sensitivity to Cu 2+, and the detection limit (LOD) was estimated to be 2 ppb. Moreover, a portable test strip has been successfully developed and applied for the visual inspection of Cu 2+, which provides a convenient and reliable approach to monitor Cu 2+ on site without resorting to instrumental analysis.