2-Hydroxy-naphthyl functionalized mesoporous silica for fluorescence sensing and removal of aluminum ions. Issue 22 (26th May 2017)

• Record Type: Journal Article
• Authors: Das, Trisha; Roy, Ankita; Uyama, Hiroshi; Roy, Partha; Nandi, Mahasweta
• Is Part Of: Dalton transactions. Volume 46:Issue 22(2017)
• Page Start: 7317
• Page End: 7326
• Publication Date: 2017-05-26
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c7dt00369b
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : 2-Hydroxy-naphthyl functionalized mesoporous silica has been used as a turn-on fluorescent chemosensor for Al 3+ and used to remove it with high efficiency. Abstract : Mesoporous silica functionalized with a 2-hydroxy-naphthyl moiety has been synthesized and characterized by standard techniques like powder X-ray diffraction, N2 adsorption/desorption studies, transmission electron microscopy and spectral studies like FT-IR, UV-visible, fluorescence and 13 C and 29 Si solid state NMR. The functionalized silica material showed significant enhancement in its emission intensity in the presence of Al 3+ ions whereas other metal ions could not bring about any increase in its emission intensity. They either quench the emission or do not alter the intensity significantly making the functionalized material a fluorescence chemosensor for Al 3+ . The sensitivity of the probe towards Al 3+ has been determined to be high with a low limit of detection value. As functionalized silica is not soluble in common solvents, it has been effectively used to bind and remove Al 3+ from a solution. Theoretical calculations on a model system have been performed to investigate the electronic spectral transitions.