Počet záznamů: 1  

Sorption of Enantiomers and Alcohols into Nafion® and the Role of Air Humidity in the Experimental Data Evaluation

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    SYSNO ASEP0445086
    Druh ASEPJ - Článek v odborném periodiku
    Zařazení RIVJ - Článek v odborném periodiku
    Poddruh JČlánek ve WOS
    NázevSorption of Enantiomers and Alcohols into Nafion® and the Role of Air Humidity in the Experimental Data Evaluation
    Tvůrce(i) Randová, A. (CZ)
    Bartovská, L. (CZ)
    Hovorka, Š. (CZ)
    Kačírková, Marie (UCHP-M) RID
    Vychodilová, Hana (UCHP-M) RID, SAI
    Sedláková, Zuzana (UCHP-M) RID
    Červenková Šťastná, Lucie (UCHP-M) RID, ORCID, SAI
    Brožová, Libuše (UMCH-V) RID
    Žitka, Jan (UMCH-V) RID
    Sysel, P. (CZ)
    Brus, Jiří (UMCH-V) RID
    Drašar, P. (CZ)
    Izák, Pavel (UCHP-M) RID, ORCID, SAI
    Zdroj.dok.Separation and Purification Technology. - : Elsevier - ISSN 1383-5866
    Roč. 144, APR 15 (2015), s. 232-239
    Poč.str.8 s.
    Jazyk dok.eng - angličtina
    Země vyd.GB - Velká Británie
    Klíč. slovamembranes ; mass sorption ; enantiomers ; racemic mixtures ; nafion
    Vědní obor RIVCI - Průmyslová chemie a chemické inženýrství
    Vědní obor RIV – spolupráceÚstav makromolekulární chemie - Makromolekulární chemie
    CEPGAP106/12/0569 GA ČR - Grantová agentura ČR
    Institucionální podporaUCHP-M - RVO:67985858 ; UMCH-V - RVO:61389013
    UT WOS000352664300029
    EID SCOPUS84924529858
    DOI10.1016/j.seppur.2015.02.045
    AnotaceTwo enantiomers may exhibit completely different biological or pharmacological activities; therefore, the resolution of the enantiomers from a racemic mixture is an important task. The results of the total sorption measurements for the individual liquid enantiomers from the enantiomeric pair revealed that there is a difference between extents of their sorption in Nafion®. The difference between liquid sorption of the enantiomers of small molecules, such as the methyl lactates or 2-butanols, is higher than in the case of larger molecules, such as phenylethanols and methylbenzyl amines. This result could be explained by the hypothesis that the size of the chiral molecule must fit like a puzzle piece into the Nafion® helical polymer network. This hypothesis was supported by the 19F MAS NMR analysis, which confirmed the helical structure of Nafion®. Further, the branching of the molecules significantly influences the extent of sorption of the liquid in Nafion®, as shown for the butanols. The trend of this dependence is in agreement with the trend of heat of vaporisation and the normal boiling temperature data of the butanols. Because Nafion® easily absorbs water vapour from the air, the influence of the humidity on the sorption values was studied.
    PracovištěÚstav chemických procesů
    KontaktEva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227
    Rok sběru2016
Počet záznamů: 1