Polymethacrylate Matrix Research Articles

Thermal lens spectrometry for the synthesis and study of nanocomposites on the basis of silver salts absorbed by a polyacrylate matrix

Thermal lens spectrometry is applied to determine the absorption of transparent nanocomposite materials, which are produced by the thermal decomposition of silver salts absorbed in the bulk of a polymethacrylate matrix. The high spatial resolution of determination, corresponding to the size of laser beams, makes it possible to evaluate the homogeneity for the distribution of coloration in the matrix. The advantages of thermal lens spectrometry over spectrophotometry include the weak effect of sample scattering on the results of its absorption determination and a higher sensitivity of determination, which may exceed that of spectrophotometry by one or two orders of magnitude. The possibility of achieving local syntheses of nanosized particles in the bulk of the matrix by virtue of the photoinduced decomposition of silver salts in initial polyacrylate materials is shown. Thermal lens experiments also allow the combination of the synthesis of silver nanoparticles and control of the absorbance for the prepared structural units.

Solid phase spectrophotometric determination of silver using dithizone immobilized in a polymethacrylate matrix

Interaction of silver with Dithizone immobilized in a polymethacrylate matrix was studied. A simple procedure was proposed for the solid phase spectrophotometric determination of silver; the detection limit is 0.01 mg/L. The procedure was used for the analysis of mineral waters and the Protargol medication.

Redox and acid-base properties of 2,6-dichlorophenolindophenol immobilized on a polymethacrylate matrix

The effect of the immobilization of 2,6-dichlorophenolindophenol (DCIP) on a polymethacrylate matrix on its redox and acid-base properties was studied. The ionization constant and formal redox potentials of the immobilized DCIP were determined by solid-phase spectrophotometry. It was shown that the acidity constant and the formal potentials of DCIP decreased upon the immobilization in the polymethacrylate matrix. The results of studying the interaction of ascorbic acid with immobilized DCIP are presented.

Analytical properties of 1-(2-pyridylazo)-2-naphthol immobilized on a polymethacrylate matrix

The adsorption of 1-(2-pyridylazo)-2-naphthol (PAN) with a polymethacrylate matrix from a water-ethanol solution is studied. It is shown that PAN immobilized on a polymethacrylate matrix retains its analytical properties.

Sorption-spectrophotometric determination of iron(II, III) with the use of organic reagents immobilized in a polymethacrylate matrix

The interaction of iron(II) with 2,2′-dipyridyl and 1,10-phenanthroline immobilized in a polymethacrylate matrix was studied. The optimum conditions of the complexation of iron(II) with the immobilized reagents and the chemical analytical properties of the complexes in the polymethacrylate matrix were determined. A sorption-spectrophotometric procedure was developed for the determination of iron(II) and the total of iron(II, III) after the reduction of iron(III) by ascorbic acid. The procedure with 2,2′-dipyridyl was used for the analysis of samples of tap, well, and mineral water and a solution of glucose.

A sensitive optical element for mercury(II)

A transparent polymethacrylate matrix modified with copper dithizonate was used to determine mercury(II). Optimum conditions for modifying the polymethacrylate matrix with copper dithizonate were found, and its reaction with mercury(II) in model solutions was studied.

An Optical Sensor for the Determination of Ascorbic Acid

It is shown that an optically transparent polymethacrylate matrix modified with 2,2′-dipyridyl and iron(III) can be used as a sensor for ascorbic acid. A procedure for the solid-phase spectrophotometric and visual determination of ascorbic acid in model solutions and juices using this sensor has been developed and validated.

Ionic conductance behavior of polymeric electrolytes containing magnesium salts and their application to rechargeable batteries

Polymeric electrolytes consisting of oligo(ethylene oxide)-grafted polymethacrylate (PEO-PMA) matrix, linear polyether and magnesium salts have been prepared, and their electrochemical behavior as solid Mg 2+ ion conductors has been examined. Thermal analyses showed that the obtained polymeric electrolytes are homogeneous and amorphous over a wide temperature range. The conductivity depended much on the kind of the dissolved magnesium salt. The highest conductivity was obtained for the polymeric electrolyte containing Mg[(CF 3SO 2) 2N] 2 (>10 −4 S cm −1 at room temperature). The dc polarization of a Pt/Mg cell using the polymeric electrolyte proved that Mg 2+ is mobile in the present polymeric system. A prototype cell was constructed using the polymeric electrolyte with a Mg (or Li) anode and a V 2O 5 cathode, where the intercalation–deintercalation of Mg 2+ occurred reversibly.

Ionic conductance of polymeric electrolytes consisting of magnesium salts dissolved in cross-linked polymer matrix with linear polyether

A novel polymeric electrolyte system has been developed using oligo(ethylene oxide)-grafted polymethacrylate matrix and linear polyether which dissolves magnesium salts. Thermal analyses showed that the obtained polymeric electrolytes have homogeneous and amorphous phases over a wide temperature range. The ionic structure of the polymeric system was examined by Raman spectroscopy. The ionic conductance behavior of the polymeric electrolyte was investigated as solid Mg 2+-ion conductors. The conductivity depended mostly on the kind of the dissolved magnesium salt. The highest conductivity was obtained for the polymeric electrolytes containing Mg[(CF 3SO 3) 2N] 2 (about 10 −4 S cm −1 at room temperature). Addition of dimethyl formamide as a complex-forming liquid component in the polymeric electrolyte system enhanced the ionic conductivity. The dc polarization of an Mg/Mg cell using the polymeric electrolyte proved that Mg 2+ is mobile in the present polymeric system.