Journal
JOURNAL OF FLUORESCENCE
Volume 18, Issue 1, Pages 93-100Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10895-007-0241-x
Keywords
TIRSF; R6G; silica/water interface
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In this work, total internal reflection synchronous fluorescence spectroscopy (TIRSF) is applied successfully to investigate rhodamine 6G (R6G) at the silica/water interface. In comparison with the bulk spectra, 5 nm red shift is observed in the interface spectra, which is mainly due to the limitation of freedom of rotational movement of R6G molecules at the interface. The increase of R6G concentration induces the self-quenching of adsorbate at the interface. The dependence of interfacial fluorescence on the acidity and ionic strength was studied. Both the acidity and ionic strength affect the adsorptive behaviors of R6G at the silica/water interface.
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