Adsorption-Inhibition of Clathrate Hydrates by Self-Assembled Nanostructures.

Autor: Soussana TN; Department of Chemistry and Biochemistry, Yeshiva University, 245 Lexington Avenue, New York, NY, 10016, USA., Weissman H; Department of Organic Chemistry, Weizmann Institute of Science, 234 Hertzel Street, PO Box 26, Rehovot, 7610001, Israel., Rybtchinski B; Department of Organic Chemistry, Weizmann Institute of Science, 234 Hertzel Street, PO Box 26, Rehovot, 7610001, Israel., Drori R; Department of Chemistry and Biochemistry, Yeshiva University, 245 Lexington Avenue, New York, NY, 10016, USA.
Jazyk: angličtina
Zdroj: Chemphyschem : a European journal of chemical physics and physical chemistry [Chemphyschem] 2021 Nov 04; Vol. 22 (21), pp. 2182-2189. Date of Electronic Publication: 2021 Sep 06.
DOI: 10.1002/cphc.202100463
Abstrakt: The mechanism by which safranine O (SFO), an ice growth inhibitor, halts the growth of single crystal tetrahydrofuran (THF) clathrate hydrates was explored using microfluidics coupled with cold stages and fluorescence microscopy. THF hydrates grown in SFO solutions exhibited morphology changes and were shaped as truncated octahedrons or hexagons. Fluorescence microscopy and microfluidics demonstrated that SFO binds to the surface of THF hydrates on specific crystal planes. Cryo-TEM experiments of aqueous solutions containing millimolar concentrations of SFO exhibited the formation of bilayered lamellae with an average thickness of 4.2±0.2 nm covering several μm 2 . Altogether, these results indicate that SFO forms supramolecular lamellae in solution, which might bind to the surface of the hydrate and inhibit further growth. As an ice and hydrate inhibitor, SFO may bind to the surface of these crystals via ordered water molecules near its amine and methyl groups, similar to some antifreeze proteins.
(© 2021 Wiley-VCH GmbH.)
Databáze: MEDLINE
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