A Novel Diarylethene-rhodamine Unit Based Chemosensor for Fluorimetric and Colorimetric Detection of Hg2.
Xiumei LiXue LiHeng ZhaoHuimin KangCongbin FanGang LiuShouzhi PuPublished in: Journal of fluorescence (2021)
A novel fluorimetric and colorimetric chemosensor (1O) was synthesized with diarylethene-rhodamine unit and characterized by ESI-MS, 1H NMR, and 13C NMR. The chemosensor can selectively recognize extremely low concentrations of Hg2+ over a variety of metal ions with remarkable colorimetric and fluorescent responses. The colorimetric and fluorescent changes were ascribed the reaction between 1O and Hg2+ destructed the rhodamine hydrazide into open-ring form which was proved by mass spectrometry and nuclear magnetic titration analyses. The detection limits of the UV absorption and fluorescence methods for Hg2+ were found to be 0.708 μM and 24.6 nM, respectively. Moreover, the chemosensor exhibited excellent photochromism and outstanding fatigue resistance property under alternating UV and visible light irradiation. The application potential of the chemosensor was demonstrated with the qualitative detection of Hg2+ in real water samples.
Keyphrases
- aqueous solution
- fluorescent probe
- living cells
- label free
- mass spectrometry
- loop mediated isothermal amplification
- high resolution
- ms ms
- magnetic resonance
- visible light
- quantum dots
- real time pcr
- gold nanoparticles
- multiple sclerosis
- liquid chromatography
- radiation therapy
- risk assessment
- physical activity
- sleep quality
- minimally invasive
- solid state
- nitric oxide
- depressive symptoms
- molecularly imprinted