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Europium Benzoylacetonate-Modified Mesoporous Silica Capillary Columns

  • Sorption and Ion Exchange Processes
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Abstract

The sorption properties of capillary chromatographic columns with a mesoporous SiO2 layer modified with 1–5 wt % europium benzoylacetonate were studied. The stability temperature of europium benzoylacetonate was measured by thermal analysis to be 268°C. Low-temperature nitrogen adsorption/desorption isotherms demonstrated that modification of the surface of a mesoporous SiO2 layer results in a slight decrease in the specific surface area from 256 to 201 m2 g–1. Using the gas chromatography, it was established that when the amount of modifying agent increases to more than 4 wt %, the adsorption capacity of the columns reduces. The application of europium benzoylacetonate complexes leads to an increase in the polarity of the resulting samples, and at the same time the highest values are characteristic of organic compounds prone to donor-acceptor and proton-acceptor interactions. On capillary columns with a mesoporous SiO2 layer modified with 2 wt % europium benzoylacetonate, selective separation of aliphatic alcohols, aromatic hydrocarbons, as well as isomeric lactides: meso-, D-, and L-forms was reached, which can be employed for gas chromatographic monitoring of lactide content in analytical samples.

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Funding

The work was carried out within the framework of the state assignment of the Ministry of Education and Science of Russia, project no. 0721-2020-0037.

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Authors and Affiliations

  1. National Research Tomsk State University, 634050, Tomsk, Russia

    Zh. V. Faustova, V. V. Khasanov, Yu. G. Slizhov & E. A. Pakhnutova

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  1. Zh. V. Faustova
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  2. V. V. Khasanov
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  3. Yu. G. Slizhov
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  4. E. A. Pakhnutova
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Correspondence to Zh. V. Faustova.

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Translated from Zhurnal Prikladnoi Khimii, No. 5, pp. 434–458, August, 2023 https://doi.org/10.31857/S0044461823050055

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Faustova, Z.V., Khasanov, V.V., Slizhov, Y.G. et al. Europium Benzoylacetonate-Modified Mesoporous Silica Capillary Columns. Russ J Appl Chem 96, 545–551 (2023). https://doi.org/10.1134/S1070427223050051

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  • DOI: https://doi.org/10.1134/S1070427223050051

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