Chain-Length Anomaly in the Two-Dimensional Ordering of the Cationic Surfactants CnTAB at the Graphite/Water Interface, Revealed by Advanced Calorimetric Methods

2003 ◽  
Vol 107 (45) ◽  
pp. 12492-12496 ◽  
Author(s):  
Zoltán Király ◽  
Gerhard H. Findenegg ◽  
Ágnes Mastalir
Keyword(s):  
Chain Length ◽  
Cationic Surfactants ◽  
Water Interface ◽  
Two Dimensional ◽  
Calorimetric Methods

The adsorption of lower trialkylphosphates at the dodecane – water interface

1980 ◽  
Vol 58 (24) ◽  
pp. 2789-2795 ◽  
Author(s):  
Norman H. Sagert ◽  
Woon Lee
Keyword(s):  
Equation Of State ◽  
Chain Length ◽  
Water Interface ◽  
Two Dimensional ◽  
Free Energies ◽  
Dimensional Solution ◽  
Interfacial Tensions ◽  
Enthalpy Of Adsorption ◽  
Solution Models ◽  
Methylene Group

The adsorption of tripropylphosphate, triethylphosphate, and trimethylphosphate at the dodecane–water interface has been studied at temperatures from 293 to 313 K. Standard free energies of adsorption were obtained from the lowering of interfacial tensions in the low (< 10−4) solute mole fraction region. Standard enthalpies and entropies of adsorption were then obtained from the temperature variation of the standard free energies of adsorption.Standard free energies of adsorption from dodecane showed little variation with solute chain length, with the exception of trimethylphosphate. On the other hand, free energies of adsorption from water decreased by 3.45 kJ/mol for each methylene group added, again with the exception of trimethylphosphate. Enthalpies of adsorption increased linearly with increasing solute chain length for adsorption from either phase. For each methylene group added, the enthalpy of adsorption from dodecane increased by 2.9 kJ/mol, while that from water increased by 2.4 kJ/mol.Results for tripropylphosphate adsorption and for triethylphosphate adsorption at higher temperatures could be adequately described by the Schofield–Rideal equation of state, but not by simple two-dimensional solution models. Results for trimethylphosphate adsorption and for triethylphosphate adsorption at lower temperatures could not be fitted adequately by either type of equation of state.

Two-dimensional physical networks of lipopolymers at the air/water interface

2001 ◽  
Vol 166 (1) ◽  
pp. 1-12 ◽  
Author(s):  
C.W. Frank ◽  
C.A. Naumann ◽  
W. Knoll ◽  
C.F. Brooks ◽  
G.G. Fuller
Keyword(s):  
Water Interface ◽  
Two Dimensional ◽  
Air Water Interface

Two-Dimensional DNA-Mimetic Molecular Organizations at the Air−Water Interface

1997 ◽  
Vol 119 (9) ◽  
pp. 2341-2342 ◽  
Author(s):  
Masatsugu Shimomura ◽  
Fumio Nakamura ◽  
Kuniharu Ijiro ◽  
Hirotaka Taketsuna ◽  
Masaru Tanaka ◽  
...  
Keyword(s):  
Water Interface ◽  
Two Dimensional ◽  
Air Water Interface

Assembly of a Two-dimensional Cobalt-iron Cyanide Grid Network at an Air-water Interface

2002 ◽  
Vol 376 (1) ◽  
pp. 383-388
Author(s):  
Jeffrey T. Culp ◽  
A. NICOLE Morgan ◽  
Mark W. Meisel ◽  
Daniel R. Talham
Keyword(s):  
Water Interface ◽  
Two Dimensional ◽  
Iron Cyanide ◽  
Grid Network ◽  
Air Water Interface ◽  
Cobalt Iron
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