{"title":"Influence of the Functional Groups of Modifying Chelates on the Adsorption of Aromatic Hydrocarbons by the Silica Surface","authors":"E. A. Pakhnutova, Yu. G. Slizhov","doi":"10.1134/S0036024424701814","DOIUrl":null,"url":null,"abstract":"<p>Adsorbents based on Silipore 200 silica noncovalently modified with complex compounds of nickel(II) with acetylacetone, benzoylacetone, and ethyl acetoacetate were obtained. The interaction of the vapors of aromatic compounds with the silica surface was studied by gas chromatography: the Henry constants were calculated, the thermodynamic characteristics of adsorption of the class of compounds under study were determined based on chromatographic data, and the contributions of modifying additives to the retention of adsorbates were calculated. The effects of the ligand functional groups in the chelate complex on the differential molar heat of adsorption and the change in the adsorption entropy were studied. The possibility of using the sorbents for gas chromatographic separation of complex mixtures of organic compounds was shown.</p>","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"98 11","pages":"2615 - 2623"},"PeriodicalIF":0.7000,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Journal of Physical Chemistry A","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1134/S0036024424701814","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Adsorbents based on Silipore 200 silica noncovalently modified with complex compounds of nickel(II) with acetylacetone, benzoylacetone, and ethyl acetoacetate were obtained. The interaction of the vapors of aromatic compounds with the silica surface was studied by gas chromatography: the Henry constants were calculated, the thermodynamic characteristics of adsorption of the class of compounds under study were determined based on chromatographic data, and the contributions of modifying additives to the retention of adsorbates were calculated. The effects of the ligand functional groups in the chelate complex on the differential molar heat of adsorption and the change in the adsorption entropy were studied. The possibility of using the sorbents for gas chromatographic separation of complex mixtures of organic compounds was shown.
期刊介绍：
Russian Journal of Physical Chemistry A. Focus on Chemistry (Zhurnal Fizicheskoi Khimii), founded in 1930, offers a comprehensive review of theoretical and experimental research from the Russian Academy of Sciences, leading research and academic centers from Russia and from all over the world.
Articles are devoted to chemical thermodynamics and thermochemistry, biophysical chemistry, photochemistry and magnetochemistry, materials structure, quantum chemistry, physical chemistry of nanomaterials and solutions, surface phenomena and adsorption, and methods and techniques of physicochemical studies.
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