Capped Mesoporous Silica Nanoparticles for the Selective and Sensitive Detection of Cyanide. Issue 20 (22nd September 2017)

• Record Type: Journal Article
• Authors: Sayed, Sameh El; Licchelli, Maurizio; Martínez‐Máñez, Ramón; Sancenón, Félix
• Is Part Of: Chemistry, an Asian journal. Volume 12:Issue 20(2017)
• Page Start: 2670
• Page End: 2674
• Publication Date: 2017-09-22
• Subjects: cyanides -- hybrid materials -- macrocyclic ligands -- mesoporous silica nanoparticles -- optical detection; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/asia.201701130
• Languages: English
• ISSNs: 1861-4728

Abstract

Abstract: 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 . Abstract : Sense and Sensitivity : Mesoporous silica nanoparticles loaded with [Ru(bipy)3 ] 2+, functionalized with Ni II macrocyclic complex subunits, and capped with a bulky anion (hexametaphosphate) were used to selectively and sensitively detect cyanide in water.