Abstract:An attempt of synthesis of information concerning chosen organosilicon compounds of the group of electrostatically stabilized (ES)-silanates is described. All hypercoordinated organosilicon derivatives show biological activity. This activity is very important for the whole ecosystem. Some of these compounds easily hydrolyze; it causes various difficulties during their isolation from different matrices and while preparing the samples to chromatographic analysis. Hypercoordinated ES-silanates can be determinate … Show more
“…As the terminating electrolyte (TE), 5·10 –3 mol/dm 3 solution of 4,4′-bis{1-[( N,N -dimethyl)aminomethyl]spirobi(1-sila-2,5-dioxacyclopentane-3-on)at} was used (Fig. 2 ) (Kluska 2008 ; Jabłońska et al 2020a ). Fig.…”
The paper presents results of the research on the dynamics of changes in the concentration of mercury in surface waters. The importance of mercury as an environmental pollutant results from specific properties of this metal, many sources of contamination, volatility, mobility, stability and high toxicity of its specific chemical forms. Samples of surface water collected from three rivers: the Bug, the Liwiec and the Muchawka were analysed. The Muchawka River flows into the Liwiec River, which in turn is a tributary of the Bug River. The technique of isotachophoresis was employed, using a solution of a biodegradable and environmentally non-toxic derivative of electrostatically stabilised silanates as the terminating electrolyte. The highest average mercury concentration of 0.89 μg/dm3 was determined in water samples collected from the Bug River in January, whereas the lowest concentration of 0.42 μg/dm3 was recorded in water collected from the Muchawka River in September.
“…As the terminating electrolyte (TE), 5·10 –3 mol/dm 3 solution of 4,4′-bis{1-[( N,N -dimethyl)aminomethyl]spirobi(1-sila-2,5-dioxacyclopentane-3-on)at} was used (Fig. 2 ) (Kluska 2008 ; Jabłońska et al 2020a ). Fig.…”
The paper presents results of the research on the dynamics of changes in the concentration of mercury in surface waters. The importance of mercury as an environmental pollutant results from specific properties of this metal, many sources of contamination, volatility, mobility, stability and high toxicity of its specific chemical forms. Samples of surface water collected from three rivers: the Bug, the Liwiec and the Muchawka were analysed. The Muchawka River flows into the Liwiec River, which in turn is a tributary of the Bug River. The technique of isotachophoresis was employed, using a solution of a biodegradable and environmentally non-toxic derivative of electrostatically stabilised silanates as the terminating electrolyte. The highest average mercury concentration of 0.89 μg/dm3 was determined in water samples collected from the Bug River in January, whereas the lowest concentration of 0.42 μg/dm3 was recorded in water collected from the Muchawka River in September.
“…Moreover, they are soluble in dimethyl sulfoxide, water and, after warming, in dichloromethane. These molecules contain one siliconcarbon bond and four silicon-oxygen bonds and their structure is similar to the natural systems [15].…”
Section: Article Related Abbreviation: Es-silanates Electrostaticallmentioning
We present the results of research on the optimal conditions for the separation and determination of newly obtained hypercoordinated compounds, which belong to the group of electrostatically stabilized silanates. The research involved five stationary and four mobile phases. The best selectivity was obtained using the graphite phase and the mobile phase consisting of acetonitrile/water (80/20). The maximum selectivity of the determined electrostatically stabilized silanates was 1.13 and 1.06 for (1), (2), (3); 1.10 and 1.15 for (4), (5), (6); and 1.12 and 1.15 for (7), (8), (9). The octadecyl phase (which is recommended as standard) did not yield satisfactory results.
“…In addition, these compounds are highly water soluble and hydrolytically stable and durable. The aforementioned electrolytes have been successfully used for many isotachophoretic analyses [110][111][112][113][114][115][116]. When using the isotachophoresis technique, the organic or inorganic ions to be analyzed migrate to the corresponding electrodes after applying an electric voltage.…”
Stilbene and its derivatives belong to the group of biologically active compounds. Some derivatives occur naturally in various plant species, while others are obtained by synthesis. Resveratrol is one of the best-known stilbene derivatives. Many stilbene derivatives exhibit antimicrobial, antifungal or anticancer properties. A thorough understanding of the properties of this group of biologically active compounds, and the development of their analytics from various matrices, will allow for a wider range of applications. This information is particularly important in the era of increasing incidence of various diseases hitherto unknown, including COVID-19, which is still present in our population. The purpose of this study was to summarize information on the qualitative and quantitative analysis of stilbene derivatives, their biological activity, potential applications as preservatives, antiseptics and disinfectants, and stability analysis in various matrices. Optimal conditions for the analysis of the stilbene derivatives in question were developed using the isotachophoresis technique.
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