2004
DOI: 10.1002/cphc.200400303
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Luminescence Quantum Yield Determination for Molecules Adsorbed onto Solid Powdered Particles

Abstract: A new methodology for the determination of the fluorescence quantum yield of dyes adsorbed onto microcrystalline cellulose is presented and applied to rhodamine 101, cresyl violet and auramine O. It is based on a previously reported method by Ruetten and Thomas (J. Phys. Chem., 1998, 102, 598-606), which is not applicable to the dyes used in the present study. It uses ground-state diffuse reflectance spectra obtained with and without filters, which prevents the luminescence of the dye from reaching the integra… Show more

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Cited by 20 publications
(13 citation statements)
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“… and Vieira Ferreira et al . , and consists in comparing diffuse reflectance values obtained with and without an optical filter interposed between the sphere and the photomultiplier detector. The filter has to block a substantial fraction of the sample luminescence.…”
Section: Integrating Sphere Methodsmentioning
confidence: 99%
“… and Vieira Ferreira et al . , and consists in comparing diffuse reflectance values obtained with and without an optical filter interposed between the sphere and the photomultiplier detector. The filter has to block a substantial fraction of the sample luminescence.…”
Section: Integrating Sphere Methodsmentioning
confidence: 99%
“…wavelength (28,29). Absolute fluorescence quantum yields were calculated from total reflectance measurements with and without a suitable filter (Schott BG38, 2 mm thickness), which cuts a substantial amount of the emission of the solid sample.…”
Section: Methodsmentioning
confidence: 99%
“…For strongly fluorescent solid samples, reflectance is overestimated by luminescence reaching the photodetector. Observed fluorescence quantum yields can be calculated from reflectance spectra with and without filter in front of the detector and considering thick layer emission spectra corrected for changes in the detector responsivity with wavelength (28,29). Absolute fluorescence quantum yields were calculated from total reflectance measurements with and without a suitable filter (Schott BG38, 2 mm thickness), which cuts a substantial amount of the emission of the solid sample.…”
mentioning
confidence: 99%
“…With this set-up, both fluorescence and phosphorescence spectra were easily available (by the use of the variable time gate width and start delay facilities of the ICCD). The determination of fluorescence quantum yield in solution and on solid supports was done in accordance with references [35,37]. …”
Section: Methodsmentioning
confidence: 99%
“…One of our group’s interests is the photophysical processes of several probes [30,31,32,33,34,35,36,37,38,39,40,41,42], including cyanine dyes [30,31,32,40,43] adsorbed on various heterogeneous powdered supports, particularly onto microcrystalline cellulose. Probes included within cyclodextrin [40,41] and calixarene [42] cavities were also investigated.…”
Section: Introductionmentioning
confidence: 99%