Details

Autor(en) / Beteiligte

• Xiong, Jingwen
• Li, Zongzhi
• Ji, Shaomin
• Pan, Chengqiang
• Ji, Wenjin
• Li, Qi
• Huo, Yanping

Titel

Recyclable fluorescent chemodosimeters based on 8-hydroxyquinoline derivatives for highly sensitive and selective detection of mercury(II) in aqueous media and test strips

Ist Teil von

• Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 2019-07, Vol.218, p.196-205

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2019

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• Four novel highly selective 8-hydroxyquinoline-based fluorescent chemodosimeters (1–4) were synthesized for the rapid analysis of Hg2+ in aqueous solution and on paper strips, which probably attributed to the excited state intramolecular proton transfer (ESIPT) process. Chemodosimeter 1 was evaluated as a Hg2+-ratiometric fluorescent sensor while others (2, 3 and 4) displayed fluorescence turn-on response for Hg2+ among the various survey metal ions. We demonstrated that chemodosimeters (1–4) could recognized Hg2+ ions based on a 1:1 stoichiometric binding event with fast detection time. More importantly, the detection limits for Hg2+ could reach at 10−9 M level except chemodosimeter 1 (4.05 × 10−8 M). In addition, it was found that chemodosimeters (1–4) were recycled efficiently because the Hg2+ induced emission spectra were reversed after adding NaBH4. Finally, these four sensors were successfully applied for fabrication of simple device test strips for rapid and on-site detection of Hg2+ ions. [Display omitted] •Four fluorescent chemodosimeters (1-4) for the rapid analysis of Hg2+ with ratiometric and “turn on” fluorescent response manner.•The detection limits of chemodosimeters (2-4) for Hg2+ could reach at 10-9 M level.•Chemodosimeters (1-4) were applied to the fabrication of simple device test strips for rapid and on-site detection of Hg2+ ions.•Chemodosimeters (1-4) can be regenerated by adding an excess of NaBH4.