Science Links Japan | Stably dispersed systems of SWNT in water by using mono saccharide- appended low-molecular weight gelator or naturally occurring polysaccharides.

Stably dispersed systems of SWNT in water by using mono saccharide- appended low-molecular weight gelator or naturally occurring polysaccharides.

Accession number;04A0258616

Title;Stably dispersed systems of SWNT in water by using mono saccharide- appended low-molecular weight gelator or naturally occurring polysaccharides.

Author; ASAI MASAYOSHI (Kyushu Univ., Graduate School, JPN) FUJITA NORIFUMI (Kyushu Univ., Graduate School, JPN) NUMATA MUNENORI (Kyushu Univ., Graduate School, JPN) SAKURAI KAZUO (Kitakyudai) SHINKAI SEIJI (Kyushu Univ., Graduate School, JPN)

Journal Title;Abstracts. Symposium on Biofunctional Chemistry

Journal Code:L0836A

ISSN:

VOL.18th;NO.;PAGE.66-67(2003)

Figure&Table&Reference;FIG.3, REF.1

Pub. Country;Japan

Language;Japanese

Abstract;Since discovery of single-walled carbon nanotubes (SWNTs), they have been expected to become a new potential source of functional materials. However, their strong cohesive nature and poor solubility have caused the researchers trouble. In order to hinder their strong cohesive force after SWNTs was dispersed into water, we used a hydrogelator. A hydrogelator bearing an aromatic .PI.-group may be capable of dispersing SWNTs into the medium, because it is known that several .PI.-group-containing compounds are useful to stably disperse SWNTs into the medium. Recently, we developed new sugar-based gelators bearing an azonaphthol moiety, which serve as a probe for the microscopic solvent polarity: from a UV-Vis spectral change induced by the azo-hydrozone tautomerism(Figure 2.). Therefore, if this gelator disperses SWNTs by the interaction between the .PI.-group in the gelator and the .PI.-surface of SWNTs, one can readily detect the interaction by spectroscopic methods. At first a low molecular weight gelator containing glucose and azonaphthol units (1) (0.26 mg) and SWNTs were mixed with water (240 .MU.L)/ethanol (60 .MU.L) mixed solvent and the gel was created. Tgel value of the 1 gel was raised to about 10 .DEG.C. (56.9 .DEG.C..RAR.66.2 .DEG.C.) by addition of SWNTs. Furthermore, when confocal laser scanning microscope observation of gel was performed, it was shown that the fluorescence spectra of the gel which seems to interact with the SWNTs differs from the spectra of the gel which do not interact with the SWNTs. Moreover, since it has been clearly showed that SWNTs are strongly stabilized by the use of naturally occurring polysaccharide, it will be also reported together. (author abst.)

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