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

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 x 10(-2) M and 5 x 10(-6) M were studied. The maximum fluorescence emission is observed at concentration of Rhodamine B C = 3 x 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 approximately 0.82.

Electrospinning of laser dye Rhodamine B-doped poly(methyl methacrylate) nanofibers

“…These results are in agreement with the literature. 32,44 It could also be noticed that a plateau was not reached. 43 When a plateau is reached, at high concentrations, aggregation formation restricts the peak shift.…”

“…The explanation for such beha- molecular forms, such as cationic, zwitterionic, quinonic and lactonic. 32 Since ionic charges are in direct relation with the electrical conductivity of the solution, increasing the charge density on the surface of the ejected jet leads to an increase in the electric charges carried by the jet. When the conductivity of the solution is increased, more charges can be carried by the jet.…”

“…RhB is of great interest as it processes the highest photostability, ≈9,000 GJ mol -1 . 32 In this work, the electrospinning of PMMA-RhB nanofibers was performed, and the structure, morphology, and the linear and nonlinear optical properties of the resulting fibers were investigated. EXPERIMENTAL Commercially available PMMA Acryrex ® CM205 (Chi Mei Corp.) (M ̅ w ≈90400 g mol -1 ) pellets were used as the matrix for preparing the samples.…”

Femtosecond laser fabrication of waveguides in Rhodamine B-doped GPTS/TEOS-derived organic/silica monolithic xerogel

“…2(b)). Such reduction in the fluorescence intensity is associated with non radiative energy transfer resulting from the formation of aggregates, when the average distance among molecules is decreased [39], as well as to the relaxation between vibronic levels of Rhodamine B [40,41].…”

Kinetics of intercalation of fluorescent probes in magnesium–aluminium layered double hydroxide within a multiscale reaction–diffusion framework

“…RhB is a three-dimensional cationic probe in an acidic medium and a neutral one (electronic supplementary material, figure S1) in a basic solution [19], while HPTS is a two-dimensional poly-anionic dye (electronic supplementary material, figure S2) having a pK a of approximately 7.3 [20]. The electronic absorption and emission spectra of these dyes, in addition to the lifetime values, are sensitive to their molecular environment [21][22][23]; thus, they are used in this paper to examine their conformation and dynamics upon intercalation in the MgAlA LDHs [24].…”