| Autor: |
Okuyama, Masataka, Yoshida, Tadayoshi, Tanii, Tadaaki, Kunugi, Masahito, Ishizaki, Isao |
| Zdroj: |
Bulletin of the Chemical Society of Japan; January 1975, Vol. 48 Issue: 1 p191-194, 4p |
| Abstrakt: |
Stable bimolecular films (bilayers) were found to be formed in aqueous solutions from myristyl alcohol or from mixtures of myristyl alcohol and myristic acid. The electric capacitance and resistance of these bilayers were measured in solutions of pH 3–8. The capacitance of mixed bilayers was larger than that of myristyl alcohol bilayers (0.58 μF/cm2). When the bilayers were formed from sample solutions having mole ratios 1/1 and 2.3/1 (myristic acid to myristyl alcohol), the capacitance had minima at ca.pH 7. The resistance of mixed bilayers at ca.pH 5 was smaller than one tenth of that of the myristyl alcohol bilayer (ca.7×108Ω·cm2). The results are explained in terms of (i) van der Waals attraction between hydrocarbon chains, (ii) the tendency for myristic acid to form expanded layers, (iii) the head group attraction between the myristic acid ion and myristyl alcohol, and (iv) the tendency for myristic acid ions to dissolve in the aqueous phase. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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