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Large-Area (600 mm 2 ) Bimolecular Film in Aqueous Solutions. The Effect of an Amine–Ni 2+ Complex on the Stability of cis -9-Octadecenylamine Bimolecular Film

1977; Oxford University Press; Volume: 50; Issue: 6 Linguagem: Inglês

10.1246/bcsj.50.1399

1348-0634

Tadayoshi Yoshida, Masataka Okuyama, Takahiro Itoh,

Electrostatics and Colloid Interactions

A large, planar, bimolecular film (bilayer, 600 mm2) of cis-9-octadecenylamine (oleylamine) was found to be formed in an NiCl2 solution. From the effect of the added metal ions on the proton magnetic resonance spectrum of octadecenylamine, it appears that the complex between the octadecenylamine molecule and the metal ion increases the stability of the bilayer. The thickness of the bilayer depended strongly on the kind of solvent in the filmforming solution. When decane, a normal alkane solvent, was used, the thickness of the bilayer was greatest (4.6 nm), and the temperature effect was smallest. The experimental results are explained in terms of (i) the influence of the solvent on the conformation of the octadecenyl chain and (ii) the amount of solvent remaining in the film.