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Supramolecular architecture of betulin diacetate complexes with arabinogalactan from Larix sibirica.

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Title: Supramolecular architecture of betulin diacetate complexes with arabinogalactan from Larix sibirica.
Authors: Mikhailenko, Mikhail A.1, Shakhtshneider, Tatyana P.1,2 shah@solid.nsc.ru, Eltsov, Ilia V.2, Kozlov, Alexander S.3, Kuznetsova, Svetlana A.4,5, Karacharov, Аnton А.4,5, Boldyrev, Vladimir V.1,2
Source: Carbohydrate Polymers. Mar2016, Vol. 138, p1-7. 7p.
Subjects: Arabinogalactan, Betulin, Dimethyl sulfoxide, Submillimeter waves, Laser ablation, Supramolecular polymers, Nuclear magnetic resonance spectroscopy
Abstract: Supramolecular ensembles of arabinogalactan (AG) and its complexes with betulin diacetate (BDA) were studied in water and dimethyl sulfoxide (DMSO) using ablation, induced by submillimeter radiation from the free electron laser. Solutions of 1 wt% AG resulted in formation of aerosol particles with a maximum size of 60–70 nm. In contrast, with DMSO as the solvent, the majority of particles were significantly smaller. Nevertheless, the addition of water shifted the particle size distribution to a larger size, suggesting the cross-linking of AG chains due to hydrogen bonding through water molecules. The ensembles of molecules were larger in solutions of the AG–BDA complex as compared to pure AG aqueous solution, and the distribution was narrow. The role of side chain interactions in the formation of AG–BDA complexes in aqueous solutions was confirmed by NMR. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:Supramolecular ensembles of arabinogalactan (AG) and its complexes with betulin diacetate (BDA) were studied in water and dimethyl sulfoxide (DMSO) using ablation, induced by submillimeter radiation from the free electron laser. Solutions of 1 wt% AG resulted in formation of aerosol particles with a maximum size of 60–70 nm. In contrast, with DMSO as the solvent, the majority of particles were significantly smaller. Nevertheless, the addition of water shifted the particle size distribution to a larger size, suggesting the cross-linking of AG chains due to hydrogen bonding through water molecules. The ensembles of molecules were larger in solutions of the AG–BDA complex as compared to pure AG aqueous solution, and the distribution was narrow. The role of side chain interactions in the formation of AG–BDA complexes in aqueous solutions was confirmed by NMR. [ABSTRACT FROM AUTHOR]
ISSN:01448617
DOI:10.1016/j.carbpol.2015.11.047