abstract

• A rhodamine organosilane derivative (Rh-UTES) has been obtained by one-pot synthesis. The chemical structure of Rh-UTES was confirmed by nuclear magnetic resonance (NMR) and infrared (FTIR) techniques. To obtain an inorganic-organic hybrid sensor, Rh-UTES was covalently immobilized on a porous silicon microcavity (PSiMc) via triethoxysilane groups. The attachment of the organic derivative into PSiMc was confirmed by FTIR, specular reflectance, and scanning electron microscopy (SEM). The optical performance of Rh-UTES receptor for Hg2%2b detection was investigated by fluorescent spectroscopy and microscopy. Upon the addition of increasing amounts of Hg2%2b ions, a remarkable enhancement in emission intensity was produced in both systems. In the solid phase, an increase of integrated fluorescent emission of 0.12- and 0.15-fold after Hg2%2b receptor coordination was observed. The light harvesting capability of PSiMc devices allowed obtaining an enhanced fluorescent emission after Rh-UTES immobilization (277-fold). The fluorescence microscopy of hybrid PSiMc sensor provided an optical qualitative test for Hg2%2b detection. © 2014, De la Cruz-Guzman et al.; licensee Springer.

authors

• Aguilar-Aguilar A.
• Bañuelos Frías Alan
• De la Cruz-Guzman M.
• Hernandez-Adame L.
• Medellín Rodríguez Francisco Javier
• Palestino Escobedo Alma Gabriela

publication date

• 2014-01-01

funding provided via

• 123732  Grant
• Consejo Nacional de Ciencia y Tecnología, CONACYT: CB-153161  Grant
• Universidad de Guanajuato, UG  Grant

published in

• Nanoscale Research Letters  Journal

keywords

• Chemosensor; Fluorescence; Heavy metal; Porous silicon; Rhodamine derivative Fluorescence; Fluorescence microscopy; Fourier transform infrared spectroscopy; Heavy metals; Nuclear magnetic resonance; Porous silicon; Scanning electron microscopy; Silicon compounds; Chemosensor; Fluorescent emission; Fluorescent spectroscopy; Inorganic-organic hybrid; Nuclear magnetic resonance(NMR); Organic derivatives; Porous silicon microcavities; Specular reflectance; Mercury compounds

Digital Object Identifier (DOI)

• 10.1186/1556-276X-9-431

start page

end page

volume

• 9

issue

• 1