| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 742717 | Sensors and Actuators B: Chemical | 2014 | 6 Pages |
•Facile synthesis of a novel Hg2+-selective fluorescent chemodosimeter.•Operated in a near pure aqueous condition with a broad pH region.•Hg2+-promoted hydrolysis reaction.
A novel fluorescent probe (RBHA) for Hg2+ was facilely synthesized by one-step condensation between rhodamine B hydrazide and glyoxylic acid. The probe could selectively detect Hg2+ in a near pure aqueous condition with a broad pH region of 5–10. A good linear relationship between the fluorescence intensity and the Hg2+ concentration was found in the range of 5.0–200 μM (R2 = 0.9825) with a detection limit of 1.0 μM (S/N = 3). Based on MALDI-TOF-MS analysis, a sensing mechanism of Hg2+-promoted hydrolysis of rhodamine-glyoxylic acid conjugate was proposed. This probe was applied for detection of Hg2+ in tap water samples with satisfying results and fluorescence imaging in living cells.
Graphical abstractA novel Hg2+-selective fluorescent chemodosimeter (RBHA) was facilely synthesized by one-step condensation between rhodamine B hydrazide and glyoxylic acid. The probe was operated in a near pure aqueous condition with a broad pH region as well as potentially used for fluorescence imaging of Hg2+ in living cells. The Hg2+-promoted hydrolysis reaction mechanism was proposed based on by MALDI-TOF-MS analysis.Figure optionsDownload full-size imageDownload as PowerPoint slide
