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Statements

Subject Item
n2:RIV%2F60461373%3A22340%2F11%3A43889946%21RIV12-MSM-22340___
rdf:type
skos:Concept n13:Vysledek
dcterms:description
Gas-liquid partitioning coefficients (K_GL) were measured for halogenated volatile organic compounds (VOCs), namely 1-chlorobutane, methoxyflurane, pentafluoropropan-1-ol, heptafluorobutan-1-ol, alpha,alpha,alpha-trifluorotoluene, and toluene in aqueous solutions of natural alpha-, beta-, and gamma-cyclodextrins (CDs) at temperatures from (273.35 to 326.35) K employing the techniques of headspace gas chromatography and inert gas stripping. The binding constants of the 1:1 inclusion complex formation between the VOCs and CDs were evaluated from the depression of the VOCs volatility as a function of CD concentration. The host?guest size matching and the hydrophobic interaction concept were used to rationalize the observed widely different affinity of the VOC-CD pairs to form the inclusion complex. The enthalpic and entropic component of the standard Gibbs free energy of complex formation as derived from the temperature dependence of the binding constant indicate the thermodynamic origin of the binding to vary greatly among the systems studied, but follow the global enthalpy?entropy compensation relationships reported previously in the literature. Gas-liquid partitioning coefficients (K_GL) were measured for halogenated volatile organic compounds (VOCs), namely 1-chlorobutane, methoxyflurane, pentafluoropropan-1-ol, heptafluorobutan-1-ol, alpha,alpha,alpha-trifluorotoluene, and toluene in aqueous solutions of natural alpha-, beta-, and gamma-cyclodextrins (CDs) at temperatures from (273.35 to 326.35) K employing the techniques of headspace gas chromatography and inert gas stripping. The binding constants of the 1:1 inclusion complex formation between the VOCs and CDs were evaluated from the depression of the VOCs volatility as a function of CD concentration. The host?guest size matching and the hydrophobic interaction concept were used to rationalize the observed widely different affinity of the VOC-CD pairs to form the inclusion complex. The enthalpic and entropic component of the standard Gibbs free energy of complex formation as derived from the temperature dependence of the binding constant indicate the thermodynamic origin of the binding to vary greatly among the systems studied, but follow the global enthalpy?entropy compensation relationships reported previously in the literature.
dcterms:title
Gas-liquid partitioning of halogenated volatile organic compounds in aqueous cyclodextrin solutions Gas-liquid partitioning of halogenated volatile organic compounds in aqueous cyclodextrin solutions
skos:prefLabel
Gas-liquid partitioning of halogenated volatile organic compounds in aqueous cyclodextrin solutions Gas-liquid partitioning of halogenated volatile organic compounds in aqueous cyclodextrin solutions
skos:notation
RIV/60461373:22340/11:43889946!RIV12-MSM-22340___
n13:predkladatel
n14:orjk%3A22340
n3:aktivita
n17:Z
n3:aktivity
Z(MSM6046137307)
n3:cisloPeriodika
8
n3:dodaniDat
n4:2012
n3:domaciTvurceVysledku
n6:9659099 n6:4985532 n6:8961131
n3:druhVysledku
n12:J
n3:duvernostUdaju
n16:S
n3:entitaPredkladatele
n19:predkladatel
n3:idSjednocenehoVysledku
200820
n3:idVysledku
RIV/60461373:22340/11:43889946
n3:jazykVysledku
n11:eng
n3:klicovaSlova
Thermodynamic quantities of binding; Inclusion complex stability; Cyclodextrin; Water; VOC; Gas-liquid partitioning
n3:klicoveSlovo
n10:Gas-liquid%20partitioning n10:Cyclodextrin n10:Inclusion%20complex%20stability n10:Water n10:Thermodynamic%20quantities%20of%20binding n10:VOC
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[CE97C81A7F80]
n3:nazevZdroje
Journal of Chemical Thermodynamics
n3:obor
n8:CF
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
3
n3:rokUplatneniVysledku
n4:2011
n3:svazekPeriodika
43
n3:tvurceVysledku
Baránková, Eva Dohnal, Vladimír Ondo, Daniel
n3:wos
000291522900020
n3:zamer
n20:MSM6046137307
s:issn
0021-9614
s:numberOfPages
8
n18:doi
10.1016/j.jct.2011.03.017
n15:organizacniJednotka
22340