A simple method of characterizing organic dyes and nanoparticles used as contrast agents for photoacoustic molecular imaging based on relative photoacoustic measurements is described. By acquiring just two time-resolved photoacoustic signals, one in the sample of interest and the other in water, measurements of the thermalisation efficiency and other parameters relevant to the characterization ...

Abstract In this work, the potential adsorption abilities of mineral materials such as zeolite (Ze), halloysite (Ha), chalcedonite (Ch), and Devonian sand (DS) used low-cost resources for removal Rhodamine B (RhB) from aqueous solutions were investigated in batch conditions. Adsorption kinetics equilibrium effect solution reaction (pH) studied. kinetic data analyzed using two models: pseudo-fir...

In the text, a new fluorescent probe based on rhodamine spirolactam ring was designed and synthesized. Rhodamine-like derivatives have not only good response speed luminous performance, but also special switch type structure, which can specifically recognize responsive metal ions. paper, Rh-TEF, 6G derivative of rhodamine, synthesized by condensation reaction, successfully used for solutions sa...

Separations of 15 pM rhodamine 6G and 30 pM rhodamine B performed in a micromachined electrophoresis channel were detected by counting fluorescence bursts from individual molecules. The migration times, peak widths, and analyte concentrations were estimated from the number and the migration time distribution of the detected molecules. Concentration detection limits estimated at >99% confidence ...

Modified rhodamine 6G molecules (Rh-Al or Rh-Aln) with polymerizable double bonds had been copolymerized with 1,8-naphthalimide derivatives. In copolymers PRNAM, naphthalimide moieties are connected to rhodamine moieties at nitrogen atom of rhodamine moiety, and in copolymers PRNM naphthalimide moieties are connected to rhodamine moieties at ester group of rhodamine moiety. We report on their p...

The effect of temperature on absorption spectra of Rhodamine 6G at concentrations of 10 and 10 M in water:ethanol solutions of various ethanol content was studied. The dimeric molecular fraction of Rhodamine 6G (10 M) was found as a function of temperature and ethanol content in the aqueous solution. It was shown that the absorption spectrum of Rhodamine 6G dimers (10 M) is dependent on tempera...

A colorless and non-fluorescent rhodamine derivative, rhodamine B hydrazide (RH), is applied to detect nitric oxide and form fluorescent rhodamine B (RB). The reaction mechanism of RH with NO is proposed in this study. The probe shows good stability over a broad pH range (pH>4). Furthermore, fluorescence intensity of RH displays an excellent linearity to the NO concentration and the detection l...