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Information × Registration Number 0211U001383, 0108U000636 , R & D reports Title Monoligand, mixed and metalsubstituted heteropolyanions of P(V), As(V), Si(IV), Ge(IV), Ga(III), their associates with cationic dyes, application to the analysis popup.stage_title Head Tsiganok Ludmila Pavlovna, Registration Date 01-02-2011 Organization Dniepropetrovsk national university popup.description2 Object of the investigation - molybdenum heteropolycompounds (HPC) P(V), Si(IV), Аs(V), Ge(IV), their ion associates (IA) with organic dyes. The goal of the investigation - fundamental investigations of the formation reactions of mixed and metal containing heteropolyanions (HPA), and ion associates of HPA P(V), As(V), Si(IV), Ge(IV) with cationic dyes, including of the new class (polymethine). Development of the new and improvement of the existing spectroscopic methods, separation and concentration methods of the above mentioned elements. Finding the Нахождение the mechanism of the sorption of the heteropolycompounds and IA on the sorbents. Methods of the investigation and equipment - spectrophotometry, colorimetry, visual, X-ray fluorescence, spectrophotometer, X-ray fluorescence spectrometer. Theoretic and practical results, novelty 1. For the first time, visual methods for the determination of P(V), As(V), Si(IV) were developed with using sorption of the HPAs with triphenylmethane dyes on polyurethane foams and paper, which significantly exceed world prototypes on sensitivity. First, the formula has been proposed, which describes the dependence of color coordinates of quantized scanned images of sorbed colored compounds on their concentration (255- R )2/2R = kC, where k = 2,3026 x eps/S, R - diffuse reflection, S - scattering coefficient, К - reflection coefficient, С - molar concentration , eps - molar absorptivity coefficient. 2. For the first time, formation reactions of IAs of polymethine dyes with HPAs with Keggin structure were proposed for the determination of central ions of HPAs - (P(V), As(V), Si(IV), Ge(IV), Ga(III)). It was established, that significant changes in the absorption spectra occur as a result of the reaction. Hypothesis has been suggested that explains the appearance of the color by dispersion interaction between molecules of the IA due to their approaching after formation of low soluble particles. It was shown that such changes are satisfactorily explained in the frames of the exciton theory of the Davidov A.S. It was shown that obtained IAs of HPAs with polymethine dyes belong to the objects of nanochemistry. Efficiency of the innovation, sphere of the application. Implementation of the effective, highly sensitive methods for the determination of P(V) and Si(IV) can improve the control of these compounds in the environmental waters, waters used in the heat supply circuits, reverse waters of heat and nuclear power plants. Product Description popup.authors Вишнікін Андрій Борисович popup.nrat_date 2020-04-02 Close