Abstract
The surface pressure-molecular area curve of the mixed monolayer of 16-(9-anthroyloxy) palmitic acid (16AP) and fatty acid (palmitic or stearic acids) showed various kink points which indicated the phase transitions of the monolayer. On the basis of the surface phase rule, the phase diagrams of the mixed monolayer were elucidated. The bifunctional molecule, 16AP, takes two orientations in a monolayer state, that is, horizontal and vertical ones. Horizontally oriented 16AP and vertically oriented fatty acid form a mixed monolayer but this exhibits deviation from the ideal mixing, which was interpreted in terms of the surface regular solution theory. On the other hand, the 16AP molecule in the vertical state was found to be immiscible with the fatty acid molecule in a monolayer de spite both molecules being vertical to the surface and parallel to each other. This was caused by the participation of the 9-anthroyloxy moiety of 16AP in the interaction of 16AP and fatty acid in the hydrophobic region of the monolayer.
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Vainio P, Virtanen JA, Kinnunen PKJ, Voyoya JC, Smith LC, Gotto Jr AM, Sparrow JT, Pattus F, Verger R (1983) Biochem 22:2270
Quarles RH, Dawson RMC (1969) Biochem J 113:697
Ries JR HE, Swith HS (1978) J Colloid Interface Sci 64:111
Kemp G, Wenner CE (1972) Biochim Biophys Acta 282:1
Bhat SG, Brockman HL (1982) Biochem 22:1547
Schwinke DL, Ganesan MG, Weiner ND (1983) J Pharm Sci 72:244
Quin PJ, Dawson RMC (1969) Biochem J 113:791; ibid (1969) 11:65; ibid (1970) 116:671
Nakagaki M, Tomita K, Handa T (1985) Biochem 24:4619
Gain JR GL (1966) Insoluble Monolayer at Lipids — Gas Interfaces, Interscience Publisher, New York, p 24
Defay R, Prigogine I, Bellemans A, Everett DH (1966) Surface Tension and Adsorption, Longmans, Green Co. Ltd. London, p 71
Handa T, Nakagaki M (1979) Coll Polym Sci 257:374
Nakagaki M, Handa T (1976) Bull Chem Soc Jpn 49:880
Hayami Y, Yano T, Motomura R (1980) Bull Soc Jpn 53:3414
Langmuir I (1939) Proc Roy Soc London A170:1
Gershfeld NL, Pagano PE (1972) J Phys Chem 76:1231
Adam NK (1968) The Physics and Chemistry of Surface, Dover Publications Inc, New York
Hildebrand JH, Scott RL (1950) The solubility of nonelectrolytes, Reinbold Publishing Co, New York, p 121
Flory PJ (1941) J Chem Phys 9:660; ibid (1942) 10:51
Werner TC, Hofman RM (1973) J Phys Chem 77:1611
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Handa, T., Tomita, K. & Nakagaki, M. Nonideal mixing of 16-(9-anthroyloxy) palmitic acid and fatty acid in monolayer. Colloid & Polymer Sci 265, 250–256 (1987). https://doi.org/10.1007/BF01412715
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DOI: https://doi.org/10.1007/BF01412715