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Entrapment of ionic tris(2,2′-bipyridyl) ruthenium(II) in hydrophobic siliceous zeolite: O sensing in biological environments

Langmuir, ISSN: 0743-7463, Vol: 24, Issue: 16, Page: 9140-9147
2008
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Article Description

Synthesis of the ionic dye, tris(2,2′-bipyridyl) ruthenium(II) chloride (Ru(bpy) ·2Cl) within the supercages of a highly hydrophobic zeolite Y is reported. Use of the neutral precursor Ru(bpy)Cl(CO) allowed for high loading levels of Ru(bpy) (1 per 7 and 25 supercages). The emission quenching of the Ru(bpy)-zeolite crystals dispersed in polydimethoxysiloxane (PDMS) films by dissolved oxygen in water was examined. The quenching data as a function of oxygen concentration was fit to a linear Stern-Volmer plot (R = 0.98). Using the Stern-Volmer plot as calibration, changes in concentration of dissolved oxygen due to reaction with glucose in the presence of glucose oxidase was monitored. Human monocyte-derived macrophages internalized the submicron-sized Ru(bpy)-zeolite crystals, and intracellular oxygen concentrations initiated by zymosan-mediated oxidative burst could be monitored by measuring the emission from Ru(bpy) by confocal fluorescence microscopy. © 2008 American Chemical Society.

Bibliographic Details

Ruda-Eberenz, Toni A; Nagy, Amber; Waldman, W James; Dutta, Prabir K

American Chemical Society (ACS)

Materials Science; Physics and Astronomy; Chemistry

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