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Full-Text Articles in Physical Sciences and Mathematics
Decreasing Of The Concentration Quenching Of Fluorescent Dye In A Solution By Introducing It To Nanoparticles Of Silicon Dioxide, A. I. Mantel, A. E. Yensebayeva, S. B. Smatov, I. S. Irgibayeva
Decreasing Of The Concentration Quenching Of Fluorescent Dye In A Solution By Introducing It To Nanoparticles Of Silicon Dioxide, A. I. Mantel, A. E. Yensebayeva, S. B. Smatov, I. S. Irgibayeva
Eurasian Journal of Physics and Functional Materials
The technique of introduction a fluorescent dye Tris(bipyridine)ruthenium (II) chloride into nanoparticles of silicon dioxide in isopropyl alcohol was tested. The preparation of nanoparticles was carried out by means of the Stober method. The optimal reaction conditions were determined. It was found out that the penetration of a dye into silicon dioxide nanoparticles reduced the effect of concentration quenching of the dye and made it possible to achieve an increase in fluorescence intensity in the solution more than twofold. An attempt was made to functionalize the obtained particles by introducing amino groups onto the particle surface. Fused silver nanoparticles were …
Photo Stability Of Solutions Of Some Rodamine Dyes With Carboxyl Group, N. Nizomov, A.A. Jamalova, A.Sh. Yarmuxamedov
Photo Stability Of Solutions Of Some Rodamine Dyes With Carboxyl Group, N. Nizomov, A.A. Jamalova, A.Sh. Yarmuxamedov
Scientific Journal of Samarkand University
The effect of light irradiation on the spectral-luminescent characteristics of some rhodamine dyes with a carboxyl group in solvents of various natures was studied. It has been established that under the influence of light irradiation in aqueous solutions of selected dyes, a decrease in the intensity of absorption and fluorescence with a simultaneous hypsochromic shift of the electronic spectra is observed.Under the same conditions, discolored solutions of rhodamine dyes in a binary solvent mixture of 1% water + 99% DMSO are reduced in color and, accordingly, absorbing and fluorescent capacity. The observed phenomenon is explained by the transition of molecules …