Effect of Host Medium on the Fluorescence Emission Intensity of Rhodamin B in Liquid and Solid Phase

Citation:
Fikry, M., M. M. Omar, and L. Z. Ismail, "Effect of Host Medium on the Fluorescence Emission Intensity of Rhodamin B in Liquid and Solid Phase ", Journal of Fluorescence, vol. 19, issue 4, pp. 741–746, 2009.

Abstract:

In this work, we study the effect of concentration,
host medium, PH and phase states on the fluorescence
emission from the laser dye Rhodamine B pumped by UV
laser as exited source. The polymethylmethacrylate PMMA is
used as a host medium in case of solid phase samples while,
ethanol and Tetrahydrofuran (THF) are used in case of a liquid
one. Laser Induced Fluorescence (LIF) technique was used to
study the fluorescence properties of both cases of liquid and
thin film solid-state samples. In addition, the Dual Thermal
Lens (DTL) technique was used to study the quantum yield of
these samples. The concentrations of Rhodamine B in ethanol
as solvent between 2×10−2 M and 5×10−6 M were studied.
The maximum fluorescence emission is observed at concentration
of Rhodamine B C=3×10−4 M. Comparison studies
were investigated for different host medium such as ethanol,
THF, PMMA in liquid phase state and PMMA in solid phase
state. The measurements revealed that, the behavior of both
phases state was analogous. Rhodamine B/PMMA thin film
sample by ratio of 4:1 and thickness 0.12 mm was found to
have the best photostability sample with a quantum yield
about ≈0.82.

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