Incorporation of a FRET dye pair into mesoporous materials: a comparison of fluorescence spectra, FRET activity and dye accessibility

Fluorescein and rhodamine B modified mesoporous silica particles were synthesized by post-grafting and co-condensation approaches. The materials exhibited different pore size distributions, particle shapes and sizes. The materials were characterized by nitrogen sorption, scanning electron microscopy...

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Veröffentlicht in:Analyst (London) 2015-08, Vol.14 (15), p.5324-5334
Hauptverfasser: Widmer, Susanne, Reber, Michael J, Müller, Patrick, Housecroft, Catherine E, Constable, Edwin C, Rossi, René M, Brühwiler, Dominik, Scherer, Lukas J, Boesel, Luciano F
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container_end_page 5334
container_issue 15
container_start_page 5324
container_title Analyst (London)
container_volume 14
creator Widmer, Susanne
Reber, Michael J
Müller, Patrick
Housecroft, Catherine E
Constable, Edwin C
Rossi, René M
Brühwiler, Dominik
Scherer, Lukas J
Boesel, Luciano F
description Fluorescein and rhodamine B modified mesoporous silica particles were synthesized by post-grafting and co-condensation approaches. The materials exhibited different pore size distributions, particle shapes and sizes. The materials were characterized by nitrogen sorption, scanning electron microscopy and fluorescence spectroscopy. The Förster resonance energy transfer between the selected dye pair was explored for the different materials by exposure to various concentrations of gaseous ammonia. A logarithmic increase in rhodamine B emission with increasing ammonia concentration was observed for both post-grafted and co-condensed materials. The dye accessibility by ammonia gas in the silica framework of mesoporous materials was evaluated by using a flow cell gas sensor setup built in-house. Response to ammonia gas and recovery with nitrogen gas are explained by comparing the structure properties and dye loading of the materials. The post-grafted dye modified silica showed better performance in terms of reversibility and recovery. The incorporation of fluorescent dyes into mesoporous silicates was investigated as potential FRET based systems for gas sensing applications with better response than non-particulate systems.
doi_str_mv 10.1039/c5an00850f
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source Royal Society of Chemistry Journals Archive (1841-2007); Royal Society Of Chemistry Journals 2008-; Alma/SFX Local Collection
subjects Accessibility
Ammonia
Dyes
Fluorescence
Fretting
Materials selection
Rhodamine
Silicon dioxide
title Incorporation of a FRET dye pair into mesoporous materials: a comparison of fluorescence spectra, FRET activity and dye accessibility
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