Synthesis of Pentacoordinated Si-(Morpholiniomethyl)Silanates*

Kluska

Oceanological and Hydrobiological Studies

et al. 2020

The analyzed organosilicon derivatives of electrostatically stabilized silanates belong to a group of pentacoordinated compounds. These derivatives are: 1-(N-morpholiniomethyl)spirobi(1-sila-2,5-dioxacyclopentan-3-on)at, 1-(N-morpholiniomethyl)spirobi(1-sila-2,5-dioxa-4-methylcyclopentan-3-on)at, 1-(N-morpholiniomethyl) spirobi(1-sila-2,5-dioxa-4-(i-propyl)cyclopentan-3-on)at.In the course of the work, the extraction process and optimization of conditions for separation and determination of a mixture of electrostatically stabilized silanates were carried out using capillary isotachophoresis. Proper leading electrolytes were elaborated developed and the terminating electrolyte: 4,4’-bis[(1-morpholiniomethyl)spirobi(1-sila-2,5-dioxacyclopentan-3-on)at] was proposed. The extraction process involved the use of three stationary phases: octadecyl, octyl and phenylpropyl. The highest recovery values, approx. 94%, were obtained on the phenylpropyl column. The optimum time of analysis by the isotachophoretic technique did not exceed 12 min. The developed method of separation and determination of electrostatically stabilized silanates expands the possibility of research on biological activity of this group of compounds in aqueous solutions and surface water vegetation.

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Section: Methodsmentioning

confidence: 99%

Development of an extraction procedure and analysis of electrostatically stabilized silanates from aqueous solutions

Kluska

Oceanological and Hydrobiological Studies

et al. 2020

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“…Samples of ES-silanates ( Figure 1) were synthesized at the Institute of Chemistry, Siedlce University of Natural Sciences and Humanities. Derivatives of ES-silanates were prepared using the method described in the literature [21][22][23]. To ensure adequate purity of the analyzed compounds, crystallization from aqueous solution of γbutyrolactone (3:1) was employed.…”

Section: Hplc Analysis Of Es-silanatesmentioning

confidence: 99%

The challenge of separating and determining biologically active electrostatically stabilized silanates using the high‐performance liquid chromatography technique

Kluska

J of Separation Science

2020

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.

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A non-toxic for environmental electrolyte terminating for the analysis of stilbene derivatives by the isotachophoresis technique

Kluska²,

International Journal of Environmental Analytical Chemistry

et al. 2020