title: "Reactive" optical sensor for Hg2+and its application in environmental aqueous media and biological systems.
abstract: A new rhodamine B-based "reactive" optical sensor (1) for Hg2+was synthesized. Sensor 1 shows a unique colorimetric and fluorescent "turn-on" selectivity to Hg2+over 14 other metal ions with a hypersensitivity (detection limits are 27.6 nM (5.5 ppb) and 6.9 nM (1.4 ppb), respectively) in neutral buffer solution. To test its applicability in the environment, sensor 1 was applied to quantify and visualize low levels of Hg2+in tap water and river water samples. The results indicate sensor 1 is a highly sensitive fluorescent sensor for Hg2+with a detection limit of 1.7 ppb in tap water and river water. Moreover, sensor 1 is a convenient visualizing sensor for low levels of Hg2+(0.1 ppm) in water environment (from colorless to light pink). In addition, sensor 1 shows good potential as a fluorescent visualizing sensor for Hg2+in fetal bovine serum and living 293T cells. The results indicate that sensor 1 shows good potential as a highly sensitive sensor for the detection of Hg2+in environmental and biological samples. Graphical Abstract A new rhodamine B-based "reactive" optical sensor (1) for Hg2+was synthesized. 1 shows a unique colorimetric and fluorescent "turn-on" selectivity to Hg2+over 14 other metal ions with a hypersensitivity in water environment. And it is a convenient visualizing probe for low levels of Hg2+in environment aqueous media, fetal bovine serum and living 293T cells.
authors.affiliation: School of Chemistry and Environment, South China Normal University, Shipai, Guangzhou, Guangdong, 510631, China.
authors.forename: Zhi
authors.initials: Z
authors.lastname: Chen
authors.affiliation: School of Chemistry and Environment, South China Normal University, Shipai, Guangzhou, Guangdong, 510631, China.
authors.forename: Jiayun
authors.initials: J
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, Jilin University, No. 2699, Qianjin Street, Changchun, Jilin, 130012, China.
authors.forename: Dong
authors.initials: D
authors.lastname: Pan
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, Jilin University, No. 2699, Qianjin Street, Changchun, Jilin, 130012, China.
authors.forename: Hongwei
authors.initials: H
authors.lastname: Li
authors.affiliation: School of Chemistry and Environment, South China Normal University, Shipai, Guangzhou, Guangdong, 510631, China.
authors.forename: Yunhui
authors.initials: Y
authors.lastname: Yao
authors.affiliation: School of Chemistry and Environment, South China Normal University, Shipai, Guangzhou, Guangdong, 510631, China.
authors.forename: Zu
authors.initials: Z
authors.lastname: Lyu
authors.affiliation: School of Chemistry and Environment, South China Normal University, Shipai, Guangzhou, Guangdong, 510631, China.
authors.forename: Liting
authors.initials: L
authors.lastname: Yang
authors.affiliation: School of Chemistry and Environment, South China Normal University, Shipai, Guangzhou, Guangdong, 510631, China. mlj898021@aliyun.com.|Key Laboratory of Theoretical Chemistry of Environment Ministry of Education, South China Normal University, Guangzhou, Guangdong, 510006, China. mlj898021@aliyun.com.
authors.forename: Li-Jun
authors.initials: LJ
authors.lastname: Ma
mesh_terms: D003124:Colorimetry; D057809:HEK293 Cells; D006801:Humans; D008628:Mercury / Q000032:analysis*; D055095:Optics and Photonics; D013057:Spectrum Analysis / Q000379:methods; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D014874:Water Pollutants, Chemical; D008628:Mercury
keywords: Colorimetric; Fluorescent turn-on; Hg2+; Rhodamine B; “Reactive” sensor