Generality of hydrophobic phenomena for aqueous solutions of amphiphiles

Autor:	Claudio A. Cerdeiriña, Katerina Zemánková, Luis Romaní, Jacobo Troncoso
Rok vydání:	2015
Předmět:	Aqueous solution Chemistry Plane (geometry) Composition dependence Butanol General Physics and Astronomy Heat capacity chemistry.chemical_compound Chemical physics Amphiphile Organic chemistry Molecule Isobaric process Physical and Theoretical Chemistry
Zdroj:	Chemical Physics Letters. 640:184-187
ISSN:	0009-2614
DOI:	10.1016/j.cplett.2015.10.029
Popis:	With the temperature and composition dependence of the isobaric heat capacity as our experimental probe, previously reported anomalous behaviors for tert -butanol and 2-butoxyethanol in water are shown to belong to a general scheme for aqueous solutions of amphiphiles. As opposed to a pretransitional scenario, our results point towards aggregation of the hydrophobic moieties of solute molecules as the origin of the phenomenology. The locus in the mole fraction-temperature plane that maps anomalies for 1-pentylamine solutions extends to quite small concentrations and 330 K, thereby raising questions on the roles of hydration and aggregation in phenomena involving so-called ‘molecular hydrophobic interfaces’.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4f37deeca066e60624c31cd6a505e134 https://doi.org/10.1016/j.cplett.2015.10.029 Zobrazit plný text záznamu Full Text from ScienceDirect