多重水素結合を利用した結晶性繊維およびマイクロチューブの非共有結合的構築
1998 年 19 巻 4 号 p. 222-229
詳細
1998 年 19 巻 4 号 p. 222-229
Amphiphiles self-assemble in water to form molecular bilayers. Their head-group arrangements can be considered to be fluidlike. This character is quite different from that of usual 3-D crystals. In this paper, self-assembling properties and morphologies of synthetic dumbbell-shaped amphiphiles (bolaamphiphiles) have been discussed. In particular, the effect of multiple hydrogen bonds on the supramolecular structures were commented. The D-glucose-and oligoglycine-based bolaamphiphiles self-assembled in water to form well-defined fibrous and vesicle-encapsulated tubular assemblies, respectively. The formation strongly depends on the length and even or odd carbon numbers of the spacer alkylene chains. FT-IR spectroscopy, X-ray diffraction and crystal analyses showed that the utilization of multiple hydrogen bonds provides the assemblies with an interesting self-assembling morphology and crystalline surfaces. These crystalline assemblies can rearrange to form 3-D crystals by converting the hydrogen-bonded scheme. Possible selfassembling models for the molecular arrangements within the fibers and tubes were proposed as a result of various solid analyses.
