Capped Mesoporous Silica Nanoparticles for the Selective and Sensitive Detection of Cyanide.
Sameh El SayedMaurizio LicchelliRamón Martínez-MáñezFélix SancenónPublished in: Chemistry, an Asian journal (2017)
The development of easy and affordable methods for the detection of cyanide is of great significance due to the high toxicity of this anion and the potential risks associated with its pollution. Herein, optical detection of cyanide in water has been achieved by using a hybrid organic-inorganic nanomaterial. Mesoporous silica nanoparticles were loaded with [Ru(bipy)3 ]2+ , functionalized with macrocyclic nickel(II) complex subunits, and capped with a sterically hindering anion (hexametaphosphate). Cyanide selectively induces demetallation of nickel(II) complexes and the removal of capping anions from the silica surface, allowing the release of the dye and the consequent increase in fluorescence intensity. The response of the capped nanoparticles in aqueous solution is highly selective and sensitive towards cyanide with a limit of detection of 2 μm.
Keyphrases
- loop mediated isothermal amplification
- sensitive detection
- fluorescent probe
- aqueous solution
- ionic liquid
- quantum dots
- real time pcr
- human health
- label free
- risk assessment
- drug delivery
- oxidative stress
- heavy metals
- high intensity
- single molecule
- high resolution
- water soluble
- mass spectrometry
- walled carbon nanotubes