Polarity of an МСМ-41 adsorbent surface modified with methyl and phenyl groups based on data from gas chromatography


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详细

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.

作者简介

D. Sukhareva

Bashkortostan State University

Email: guscov@mail.ru
俄罗斯联邦, Ufa, 450076

V. Gus’kov

Bashkortostan State University

编辑信件的主要联系方式.
Email: guscov@mail.ru
俄罗斯联邦, Ufa, 450076

S. Karpov

Voronezh State University

Email: guscov@mail.ru
俄罗斯联邦, Voronezh, 394006

F. Kudasheva

Bashkortostan State University

Email: guscov@mail.ru
俄罗斯联邦, Ufa, 450076

F. Roessner

Carl von Ossietzky University

Email: guscov@mail.ru
德国, Oldenburg, 26129

E. Borodina

Voronezh State University

Email: guscov@mail.ru
俄罗斯联邦, Voronezh, 394006

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