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A near-infrared fluorescent probe for selective and quantitative detection of fluoride ions based on Si-Rhodamine.

A new interesting article has been published in Anal Chim Acta. 2018 Nov 7;1030:172-182. doi: 10.1016/j.aca.2018.05.013. Epub 2018 May 5. and titled:

A near-infrared fluorescent probe for selective and quantitative detection of fluoride ions based on Si-Rhodamine.

Authors of this article are:

Du M, Huo B, Liu J, Li M, Fang L, Yang Y.

A summary of the article is shown below:

A highly selective fluorescent probe (SiROPS) based on Si-rhodamine (SiR) towards F- was investigated. SiROPS can realize the NIR detection of F- because of the long fluorescent wavelength (λex = 650 nm, λem = 669 nm). The near-IR optical and the ratiometric fluorescence type signaling were realized by employing fluoride-selective cleavage of the latent thiophosphinated probe in mixed aqueous media. The cleavage of F- to the ortho positions of dimethylphosphinothionyl group in the meso aryl involves the suppression of internal rotation upon phosphorylation of a reactive phenolate and the activating rotation of o-OH, which resulting in a large fluorescence “Turn-Off” response. The detection limit of the probe to F- was 48 nM in the dynamic range of 0.5 μM-20 μM. In addition, the proposed probe has been used to detect F- in water samples and toothpaste samples with satisfying results.

Check out the article’s website on Pubmed for more information:



This article is a good source of information and a good way to become familiar with topics such as:

Fluorescence probe;Fluoride ions;Near-infrared;Si-rhodamine

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