Results 171 to 180 of about 2,563 (222)
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The photophysics of rhodamine B
Journal of Photochemistry, 1982Abstract The effects of solvent viscosity and dielectric constant on the photophysics of rhodamine B in its protonated and zwitterion forms were studied. The internal conversion rate is dependent on the S 1 -S 0 energy separation and increases when this gap is lowered through rotation of the diethylamino groups. Comparison is made with rhodamine 640
M.J. Snare +3 more
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Application of solutions of Rhodamine B in dosimetry
Applied Radiation and Isotopes, 2014Aqueous solutions of the organic dye Rhodamine B were found to be useful in measuring radiation doses in the range 0.1-2 kGy. Either spectrophotometric or spectrofluorometric measurements can be used. The dosimeter readout is unchanged for at least 60 days after irradiation if the solution is kept in the dark at room temperature.
W B, Beshir +3 more
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Electrooxidation of rhodamine B hydrazide
New Journal of Chemistry, 2023The electrooxidation of rhodamine B hydrazide is shown to produce rhodamine B, a phenanthrenone derivative, and a phtalazinone derivative.
Nikita Belko +7 more
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On the aggregation of rhodamine B in ethanol
Chemical Physics Letters, 1988Abstract The dimer and the trimer aggregation constants of the cationic form of rhodamine B are determined in very concentrated ethanolic solutions of the dye. The absorption spectrum, the geometrical structure and the association bonding of the aggregates are discussed and compared with those previously obtained in aqueous solution.
F.López Arbeloa +2 more
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Aggregation of Rhodamine B in Water
Russian Journal of Applied Chemistry, 2004Protolytic and associative equilibria in aqueous solutions of rhodamine B were studied. The curves of potentiometric titration with NaOH solution of the dye hydrochloride within the 5 ×10-4-3 ×10-2 M range and at an ionic strength of 0.1 M (NaCl or KCl) were treated by chemometric methods of successive modification of the equilibrium system models with
N. O. Mchedlov-Petrosyan, Yu. V. Kholin
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Chemical Physics Letters, 1973
Abstract The visible absorption fluorescence and phosporescence spectra and the polarized fluorescence and phosphorescence excitation spectra have been measured for the dimer form of rhodamine B. The rhodamine B dimer is somewhat unique in that it exhibits both fluorescence and phosphorescence whereas other dyes usually exhibit only phosphorescence ...
Takashi Kajiwara +2 more
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Abstract The visible absorption fluorescence and phosporescence spectra and the polarized fluorescence and phosphorescence excitation spectra have been measured for the dimer form of rhodamine B. The rhodamine B dimer is somewhat unique in that it exhibits both fluorescence and phosphorescence whereas other dyes usually exhibit only phosphorescence ...
Takashi Kajiwara +2 more
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A new application of Rhodamine 200 B (Sulfo Rhodamine B)
Dyes and Pigments, 1995Abstract The laser dye Rhodamine 200 B (Sulfo Rhodamine B) (CI Acid Red 52) can be used as a fluorescent counterion for the transfer of various cationic species (e.g. cationic surfactants and crown-complexes of metal ions) into a chloroform phase. The extraction of ionic associates is found to be independent of the acidity of the aqueous phase within
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Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2022
Ring-opening reaction of rhodamine spirolactam has been widely applied to construct fluorescent probes. The fluorescence properties of the probe were finely tuned for specific purpose through changing the rhodamine fluorophore. However, the influence on response range and kinetic parameters of the probe during the change has been seldom discussed ...
Fei, Deng +6 more
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Ring-opening reaction of rhodamine spirolactam has been widely applied to construct fluorescent probes. The fluorescence properties of the probe were finely tuned for specific purpose through changing the rhodamine fluorophore. However, the influence on response range and kinetic parameters of the probe during the change has been seldom discussed ...
Fei, Deng +6 more
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Molecular forms of rhodamine B
Chemical Physics Letters, 1981Abstract Three molecular forms of rhodamine B (neutral, cationic and cationic-lactonic) in aqueous solutions are reported. The pka of the equilibria between the neutral and cationic forms as well as cationic and cationic-lactonic ones are evaluated. The dimerization constants of neutral and cationic forms (coloured) are also determined.
I.López Arbeloa, P.Ruiz Ojeda
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The composition of rhodamine b chlorogallate
Analytica Chimica Acta, 1961Abstract The formula of rhodamine Bchlorogallate has been shown to be (RH) GaCl4,where R == rhodamine B.
F. Culkin, J.P. Riley
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