Desorption of benzophenone oxime monolayers at the air/water interface

D. J. Chaiko; K. Osseo-Asare

doi:10.1016/0021-9797(88)90403-1

Desorption of benzophenone oxime monolayers at the air/water interface

D. J. Chaiko, K. Osseo-Asare

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Abstract

The interfacial behavior of 2-hydroxy-5-nonylbenzophenone oxime (HBPO) at the air/water interface has been investigated with Langmuir trough techniques. The dissolution kinetics of HBPO followed a diffusion-controlled model from which the aqueous solubility of HBPO was estimated. Because of deprotonation of the hydroxyoxime group, the aqueous solubility of HBPO was pH dependent. At pH 2.0, the solubility was 0.1 μmole dm^-3 and increased to 4.0 μmole dm^-3 at pH 12. From the influence of pH on the dissolution rate, the surface pK_a for HBPO was estimated to be 11.5. At surface pressures greater than the equilibrium spreading pressure of HBPO (23 mN m^-1), simultaneous dissolution and monolayer collapse were observed.

Original language	English (US)
Pages (from-to)	13-21
Number of pages	9
Journal	Journal of Colloid And Interface Science
Volume	121
Issue number	1
DOIs	https://doi.org/10.1016/0021-9797(88)90403-1
State	Published - Jan 1988

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Biomaterials
Surfaces, Coatings and Films
Colloid and Surface Chemistry

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10.1016/0021-9797(88)90403-1

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@article{d1707041a7cd4cb284a80cb59bbea772,

title = "Desorption of benzophenone oxime monolayers at the air/water interface",

abstract = "The interfacial behavior of 2-hydroxy-5-nonylbenzophenone oxime (HBPO) at the air/water interface has been investigated with Langmuir trough techniques. The dissolution kinetics of HBPO followed a diffusion-controlled model from which the aqueous solubility of HBPO was estimated. Because of deprotonation of the hydroxyoxime group, the aqueous solubility of HBPO was pH dependent. At pH 2.0, the solubility was 0.1 μmole dm-3 and increased to 4.0 μmole dm-3 at pH 12. From the influence of pH on the dissolution rate, the surface pKa for HBPO was estimated to be 11.5. At surface pressures greater than the equilibrium spreading pressure of HBPO (23 mN m-1), simultaneous dissolution and monolayer collapse were observed.",

author = "Chaiko, {D. J.} and K. Osseo-Asare",

note = "Funding Information: This research was supported in part by the National Science Foundation under Grants CPE 8110756 and INT 8402911. The authors thank The Pennsylvania Mining and Mineral Resources Research Institute for the award of a Fellowship to D.J.C. The authors also thank Dr. Jeffrey M. Gold for useful discussions on experimental techniques. Copyright: Copyright 2014 Elsevier B.V., All rights reserved.",

year = "1988",

month = jan,

doi = "10.1016/0021-9797(88)90403-1",

language = "English (US)",

volume = "121",

pages = "13--21",

journal = "Journal of Colloid And Interface Science",

issn = "0021-9797",

publisher = "Academic Press Inc.",

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T1 - Desorption of benzophenone oxime monolayers at the air/water interface

AU - Chaiko, D. J.

AU - Osseo-Asare, K.

N1 - Funding Information: This research was supported in part by the National Science Foundation under Grants CPE 8110756 and INT 8402911. The authors thank The Pennsylvania Mining and Mineral Resources Research Institute for the award of a Fellowship to D.J.C. The authors also thank Dr. Jeffrey M. Gold for useful discussions on experimental techniques. Copyright: Copyright 2014 Elsevier B.V., All rights reserved.

PY - 1988/1

Y1 - 1988/1

N2 - The interfacial behavior of 2-hydroxy-5-nonylbenzophenone oxime (HBPO) at the air/water interface has been investigated with Langmuir trough techniques. The dissolution kinetics of HBPO followed a diffusion-controlled model from which the aqueous solubility of HBPO was estimated. Because of deprotonation of the hydroxyoxime group, the aqueous solubility of HBPO was pH dependent. At pH 2.0, the solubility was 0.1 μmole dm-3 and increased to 4.0 μmole dm-3 at pH 12. From the influence of pH on the dissolution rate, the surface pKa for HBPO was estimated to be 11.5. At surface pressures greater than the equilibrium spreading pressure of HBPO (23 mN m-1), simultaneous dissolution and monolayer collapse were observed.

AB - The interfacial behavior of 2-hydroxy-5-nonylbenzophenone oxime (HBPO) at the air/water interface has been investigated with Langmuir trough techniques. The dissolution kinetics of HBPO followed a diffusion-controlled model from which the aqueous solubility of HBPO was estimated. Because of deprotonation of the hydroxyoxime group, the aqueous solubility of HBPO was pH dependent. At pH 2.0, the solubility was 0.1 μmole dm-3 and increased to 4.0 μmole dm-3 at pH 12. From the influence of pH on the dissolution rate, the surface pKa for HBPO was estimated to be 11.5. At surface pressures greater than the equilibrium spreading pressure of HBPO (23 mN m-1), simultaneous dissolution and monolayer collapse were observed.

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U2 - 10.1016/0021-9797(88)90403-1

DO - 10.1016/0021-9797(88)90403-1

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JO - Journal of Colloid And Interface Science

JF - Journal of Colloid And Interface Science

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ER -

Desorption of benzophenone oxime monolayers at the air/water interface

Abstract

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