Novel Properties of Self-assembled Fluorinated Molecular Aggregates with Nano Levels-Fulleienes Complexes.

研究表明，在水和有机介质中，各种含氟烷基末端封端的低聚物都可以形成纳米级的自组装分子聚集体。事实上，动态光散射测量表明，氟化齐聚物水溶液中形成的分子集合体的尺寸为22 nm，而其增溶的富勒烯水溶液中的分子集合体尺寸为113 nm。富勒烯增溶到水中所形成的分子集合体的尺寸增大，表明含氟低聚物自组装与富勒烯作为客体分子相互作用，形成主客体分子间络合物。此外，还发现氟化低聚物是富勒烯在聚甲基丙烯酸甲酯[PMMA]表面上排列的一种方便的工具，并且在改性的PMMA表面获得了更高的富勒烯的荧光强度，尽管这种改性的薄膜表面的反面提供了非常弱的荧光强度。自组装的含氟分子聚集体不仅在水中，而且在甲苯、二甲苯和氯仿等常见有机溶剂中也能有效地增溶碳纳米管。因此，这些发现将为生物领域的应用和材料科学中的表面改性开辟一条新的途径。

It was clarified that a variety of fluoroalkyl end-capped oligomers can form the self-assembled molecular aggregates with nm levels in aqueous and organic media. In fact, the dynamic light scattering measurements showed that the size of molecular assemblies formed in aqueous solution of fluorinated oligomer and that in aqueous solution of fullerene solubilized by this oligomer are 22nm and 113nm levels, respectively. The increase of the size of the molecular assemblies formed by the solubilization of fullerene into water indicates the interaction of self-assemblies of fluorinated oligomer with fullerene as a guest molecule to form the host-guest intermolecular complex. In addition, fluorinated oligomers were found to be a convenient tool for the arrangements of fullerenes above the poly(methyl methacrylate) [PMMA] surface, and the higher fluorescent intensity of fullerene was obtained in the modified PMMA surface, although the reverse side of this modified film surface afforded an extremely weak fluorescent intensity. Self-assembled fluorinated molecular aggregates were also effective for solubilizing carbon nanotube not only in water but also in common organic solvents such as toluene, xylene and chloroform. Therefore, these findings would open a new route to the applications to biological fields and surface modifications in material sciences.