Autoxidative oligomerization of an amphiphilic aniline in monolayers at the air-water interface

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Abstract

An amphiphilic aniline derivative, 2-octadecyloxyaniline, spontaneously oligomerized in monolayers at the air-pure water interface by oxygen contained in air and/or water. The rate constant at the beginning of the oligomerization was estimated to be 0.003 min-1. The conversion reached 80% after 3 h under the constant molecular area (≥ 45 ± 5 A ̊2 molecule-1). Maximum chain length of the oligomer was 5 monomer units. The UV absorption spectrum of each oligomer separated by GPC was red-shifted with increasing chain length. The monolayer oligomerization occurred even on the strong basic aqueous subphase (pH 12) with relatively high conversion (50-80%). The LB multilayer transferred onto the substrate showed a highly ordered layered structure, which was evidenced by TEM and XRD. © 1995.

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Sagisaka, S., Yoshida, S., Ando, M., Iyoda, T., & Shimidzu, T. (1995). Autoxidative oligomerization of an amphiphilic aniline in monolayers at the air-water interface. Thin Solid Films, 271(1–2), 138–143. https://doi.org/10.1016/0040-6090(95)06943-7

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