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Why Are Hydrophobic/Water Interfaces Negatively Charged?
Author(s) -
Roger Kevin,
Cabane Bernard
Publication year - 2012
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201108228
Subject(s) - hydroxide , ion , hydrophobic effect , chemistry , phase (matter) , interface (matter) , chemical engineering , inorganic chemistry , organic chemistry , aqueous solution , engineering , gibbs isotherm
Impure at heart : A pH‐dependent negative charge of the interface between a hydrophobic phase and water results from the reaction of hydroxide ions with traces of fatty acids, contained in the hydrophobic phase (see scheme). This reaction explains the uptake of hydroxide ions by the interface with a large free energy change.