The influence of grafted functional groups on the adsorption properties of silica

Autor:	V. Ya. Davydov, N. M. Khrustaleva, K. B. Gurevich, T. M. Roshchina, A. A. Mandrugin
Rok vydání:	1997
Předmět:	chemistry.chemical_compound Adsorption Organic base Chemistry Silica gel Hydrogen bond Chemical polarity Inorganic chemistry Molecule General Chemistry Gas chromatography Dispersion (chemistry)
Zdroj:	Russian Chemical Bulletin. 46:431-436
ISSN:	1573-9171 1066-5285
DOI:	10.1007/bf02495390
Popis:	The adsorption properties of silica gel with grafted aminopropyl and guanidinoethanethiol (GET) groups were studied by the techniques of adsorption under static conditions and gas chromatography. It was shown that molecules capable of forming hydrogen bonds are adsorbed on all modified samples more weakly than on the initial silica gel. The grafting of GET radicals on the surface results in a noticiable increase in the dispersion interaction with adsorbed molecules. Calculation of the contributions of molecular groups to the constant of adsorption equilibrium showed that the thermodynamic characteristics of adsorption on aminosilochromes and aminosilicas with a polymeric layer of the modifying agent have similar values. Such adsorbents can be used for investigation of polar compounds, including organic bases.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::470ea6217e8c61df0b5cb63c588c0a77 https://doi.org/10.1007/bf02495390 Zobrazit plný text záznamu Full text from SpringerLink