Alkane Coiling in Perfluoroalkane Solutions : A New Primitive Solvophobic Effect

In this work, we demonstrate that n-alkanes coil when mixed with perfluoroalkanes, changing their conformational equilibria to more globular states, with a higher number of gauche conformations. The new coiling effect is here observed in fluids governed exclusively by dispersion interactions, contra...

Ausführliche Beschreibung

Bibliographische Detailangaben
Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1992. - 33(2017), 42 vom: 24. Okt., Seite 11429-11435
1. Verfasser: Morgado, Pedro (VerfasserIn)
Weitere Verfasser: Garcia, Ana Rosa, Martins, Luís F G, Ilharco, Laura M, Filipe, Eduardo J M
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2017
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article Research Support, Non-U.S. Gov't
LEADER 01000naa a22002652 4500
001 NLM275932176
003 DE-627
005 20231225010826.0
007 cr uuu---uuuuu
008 231225s2017 xx |||||o 00| ||eng c
024 7 |a 10.1021/acs.langmuir.7b02516  |2 doi 
028 5 2 |a pubmed24n0919.xml 
035 |a (DE-627)NLM275932176 
035 |a (NLM)28922605 
040 |a DE-627  |b ger  |c DE-627  |e rakwb 
041 |a eng 
100 1 |a Morgado, Pedro  |e verfasserin  |4 aut 
245 1 0 |a Alkane Coiling in Perfluoroalkane Solutions  |b A New Primitive Solvophobic Effect 
264 1 |c 2017 
336 |a Text  |b txt  |2 rdacontent 
337 |a ƒaComputermedien  |b c  |2 rdamedia 
338 |a ƒa Online-Ressource  |b cr  |2 rdacarrier 
500 |a Date Completed 31.07.2018 
500 |a Date Revised 31.07.2018 
500 |a published: Print-Electronic 
500 |a Citation Status PubMed-not-MEDLINE 
520 |a In this work, we demonstrate that n-alkanes coil when mixed with perfluoroalkanes, changing their conformational equilibria to more globular states, with a higher number of gauche conformations. The new coiling effect is here observed in fluids governed exclusively by dispersion interactions, contrary to other examples in which hydrogen bonding and polarity play important roles. FTIR spectra of liquid mixtures of n-hexane and perfluorohexane unambiguously reveal that the population of n-hexane molecules in all-trans conformation reduces from 32% in the pure n-alkane to practically zero. The spectra of perfluorohexane remain unchanged, suggesting nanosegregation of the hydrogenated and fluorinated chains. Molecular dynamics simulations support this analysis. The new solvophobic effect is prone to have a major impact on the structure, organization, and therefore thermodynamic properties and phase equilibria of fluids involving mixed hydrogenated and fluorinated chains 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
700 1 |a Garcia, Ana Rosa  |e verfasserin  |4 aut 
700 1 |a Martins, Luís F G  |e verfasserin  |4 aut 
700 1 |a Ilharco, Laura M  |e verfasserin  |4 aut 
700 1 |a Filipe, Eduardo J M  |e verfasserin  |4 aut 
773 0 8 |i Enthalten in  |t Langmuir : the ACS journal of surfaces and colloids  |d 1992  |g 33(2017), 42 vom: 24. Okt., Seite 11429-11435  |w (DE-627)NLM098181009  |x 1520-5827  |7 nnns 
773 1 8 |g volume:33  |g year:2017  |g number:42  |g day:24  |g month:10  |g pages:11429-11435 
856 4 0 |u http://dx.doi.org/10.1021/acs.langmuir.7b02516  |3 Volltext 
912 |a GBV_USEFLAG_A 
912 |a SYSFLAG_A 
912 |a GBV_NLM 
912 |a GBV_ILN_22 
912 |a GBV_ILN_350 
912 |a GBV_ILN_721 
951 |a AR 
952 |d 33  |j 2017  |e 42  |b 24  |c 10  |h 11429-11435