TY - JOUR
T1 - Liquid-Mercury-Supported Langmuir Films of Ionic Liquids
T2 - Isotherms, Structure, and Time Evolution
AU - Elfassy, Eitan
AU - Mastai, Yitzhak
AU - Pontoni, Diego
AU - Deutsch, Moshe
N1 - Publisher Copyright:
© 2016 American Chemical Society.
PY - 2016/4/5
Y1 - 2016/4/5
N2 - Ionic liquids have been intensively developed for the last few decades and are now used in a wide range of applications, from electrochemistry to catalysis and nanotechnology. Many of these applications involve ionic liquid interfaces with other liquids and solids, the subnanometric experimental study of which is highly demanding, and has been little studied to date. We present here a study of mercury-supported Langmuir films of imidazolium-based ionic liquids by surface tensiometry and X-ray reflectivity. The charge-delocalized ionic liquids studied here exhibit no 2D lateral order but show diffuse surface-normal electron density profiles exhibiting gradual mercury penetration into the ionic liquid film, and surface-normal structure evolution over a period of hours. The effect of increasing the nonpolar alkyl chain length was also investigated. The results obtained provide insights into the interactions between these ionic liquids and liquid mercury and about the time evolution of the structure and composition of their interface.
AB - Ionic liquids have been intensively developed for the last few decades and are now used in a wide range of applications, from electrochemistry to catalysis and nanotechnology. Many of these applications involve ionic liquid interfaces with other liquids and solids, the subnanometric experimental study of which is highly demanding, and has been little studied to date. We present here a study of mercury-supported Langmuir films of imidazolium-based ionic liquids by surface tensiometry and X-ray reflectivity. The charge-delocalized ionic liquids studied here exhibit no 2D lateral order but show diffuse surface-normal electron density profiles exhibiting gradual mercury penetration into the ionic liquid film, and surface-normal structure evolution over a period of hours. The effect of increasing the nonpolar alkyl chain length was also investigated. The results obtained provide insights into the interactions between these ionic liquids and liquid mercury and about the time evolution of the structure and composition of their interface.
UR - http://www.scopus.com/inward/record.url?scp=84964320838&partnerID=8YFLogxK
U2 - 10.1021/acs.langmuir.6b00196
DO - 10.1021/acs.langmuir.6b00196
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C2 - 26963651
SN - 0743-7463
VL - 32
SP - 3164
EP - 3173
JO - Langmuir
JF - Langmuir
IS - 13
ER -