A carbon dots-based fluorescent probe for turn-on sensing of ampicillin. (January 2020)

• Record Type: Journal Article
• Authors: Fu, Yanzhao; Zhao, Shaojing; Wu, Shuilin; Huang, Li; Xu, Ting; Xing, Xuejian; Lan, Minhuan; Song, Xiangzhi
• Is Part Of: Dyes and pigments. Volume 172(2020)
• Publication Date: 2020-01
• Subjects: Carbon dots -- Fluorescent probe -- Turn-on -- Fe3+ -- Ampicillin; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2019.107846
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: Carbon dots (CDs) with blue fluorescence were synthesized through hydrothermal treatment of p -dihydroxybenzene and hydrazine hydrate. The fluorescence of the investigated CDs could be selectively quenched by iron ions (Fe 3+ ) because of the strong metal-ligand coordination and electrostatic interactions between the large amount of hydroxyl, amino, and carboxyl groups on CDs' surface and Fe 3+ . Interestingly, this non-fluorescent CDs + Fe 3+ complex displayed a sensitive and selective turn-on fluorescence toward ampicillin with a limit of detection of 0.70 μM. The sensing process could be observed by naked eyes under the 365 nm UV light irradiation. Importantly, CDs + Fe 3+ complex had been successfully applied in the detection of ampicillin in river water. Highlights: Fluorescent CDs were synthesized through hydrothermal treatment of p -dihydroxybenzene and hydrazine hydrate. The fluorescence of CDs was quenched significantly and quickly upon addition of Fe 3+ . The quenched fluorescence of CDs could be selectively turned on by the addition of ampicillin. The CDs-Fe 3+ system was successfully applied in the ampicillin detection in river water.