Molecular Bilayer‐Based Superstructures of a Fullerene‐Carrying Ammonium Amphiphile: Structure and Electrochemistry

N Nakashima, T Ishii, M Shirakusa… - … A European Journal …, 2001 - Wiley Online Library
N Nakashima, T Ishii, M Shirakusa, T Nakanishi, H Murakami, T Sagara
Chemistry–A European Journal: A European Journal, 2001Wiley Online Library
The synthesis of a water‐soluble C60‐carrying single‐chain ammonium amphiphile, 10‐(N‐
methyl‐2‐fulleropyrrolidyl) decyltrimethylammonium bromide (1) as well as the
characterization of aqueous solutions and cast films of 1 are described. X‐ray diffraction
study suggests that cast films of 1 form a multilayer structure based on biomembrane‐like
molecular bilayers. Electron microscopy has revealed that 1 produces both fibrous and disk‐
like aggregates with 10–12 nm of thickness through self‐organization of 1 in aqueous …
Abstract
The synthesis of a water‐soluble C60‐carrying single‐chain ammonium amphiphile, 10‐(N‐methyl‐2‐fulleropyrrolidyl)decyltrimethylammonium bromide (1) as well as the characterization of aqueous solutions and cast films of 1 are described. X‐ray diffraction study suggests that cast films of 1 form a multilayer structure based on biomembrane‐like molecular bilayers. Electron microscopy has revealed that 1 produces both fibrous and disk‐like aggregates with 10–12 nm of thickness through self‐organization of 1 in aqueous solution. Differential scanning calorimetry, dynamic light scattering, FTIR, and UV‐visible absorption studies were also carried out to characterize aqueous solutions and cast films of 1. Electrochemistry for an aqueous solution and for cast films of just 1 and 1 incorporated in lipid films on electrodes was conducted. It was found that films of just 1 and of 1/lipid cast on electrodes showed electron transfer reactions leading to the generation of the fullerene dianion or trianion. In contrast, electrochemistry of aqueous solution of 1 at a bare electrode gives a cathodic current near −0.5 to –0.6 V against SCE; however, an anodic current for the solution did not appear.
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