Polarity of an МСМ-41 adsorbent surface modified with methyl and phenyl groups based on data from gas chromatography
- Авторы: Sukhareva D.1, Gus’kov V.1, Karpov S.2, Kudasheva F.1, Roessner F.3, Borodina E.2
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Учреждения:
- Bashkortostan State University
- Voronezh State University
- Carl von Ossietzky University
- Выпуск: Том 90, № 2 (2016)
- Страницы: 470-474
- Раздел: Physical Chemistry of Separation Processes: Chromatography
- URL: https://journals.rcsi.science/0036-0244/article/view/167802
- DOI: https://doi.org/10.1134/S0036024416020291
- ID: 167802
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Аннотация
The polarity of an MCM-41 adsorbent surface and organosilylated composites based on it with grafted trimethylsilane and dimethylphenylsilane groups is studied via inverse gas chromatography at infinite dilution. The dispersion and specific components of the value proportional to the Helmholtz adsorption energy are calculated, and a comparative analysis of the surface polarity of MCM-41 and its modified analogs relative to the commercially available C-120 silica gel is performed. The electrostatic and donor–acceptor components of the specific Helmholtz adsorption energy are calculated through linear decomposition of the adsorption energy. It is established that MCM-41 is less polar than C-120. The modification of the initial adsorbent surface leads to a reduction in polarity, due mainly to the weakening of induction and orientation interactions. It is concluded that the surfaces of the modified samples retain the ability to form hydrogen bonds.
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Об авторах
D. Sukhareva
Bashkortostan State University
Email: guscov@mail.ru
Россия, Ufa, 450076
V. Gus’kov
Bashkortostan State University
Автор, ответственный за переписку.
Email: guscov@mail.ru
Россия, Ufa, 450076
S. Karpov
Voronezh State University
Email: guscov@mail.ru
Россия, Voronezh, 394006
F. Kudasheva
Bashkortostan State University
Email: guscov@mail.ru
Россия, Ufa, 450076
F. Roessner
Carl von Ossietzky University
Email: guscov@mail.ru
Германия, Oldenburg, 26129
E. Borodina
Voronezh State University
Email: guscov@mail.ru
Россия, Voronezh, 394006