Self-assembly of a sugar-based gelator in water: Its remarkable diversity in gelation ability and aggregate structure

Jong Hwa Jung, George John, Mitsutoshi Masuda, Kaname Yoshida, Seiji Shinkai, Toshimi Shimizu

Research output: Contribution to journalArticle

209 Citations (Scopus)

Abstract

A new sugar-based gelator 1 was synthesized, and its gelation ability was evaluated in organic solvents and water. Very surprisingly, 1 was found to gelate organic solvents as well as water, indicating that 1 can act as an amphiphilic gelator. We characterized on superstructures of an aqueous gel from 1 using SEM, TEM, NMR, IR, and XRD. The aqueous gel 1 formed a three-dimensional network with 20-500 nm diameter puckered fibrils. In addition, the chiral aggregate was found to be largely twisted helical ribbons with ca. 85 nm width, ca. 315 nm pitch, and up to several micrometer length, whose helicity was exclusively left-handed. XRD diagrams indicate that an aqueous gel 1 maintains a bilayered structure with 2.90 nm long-range spacing. This gives the first example of the formation of well ordered bilayer-based aqueous gel. The XRD, FT-NMR, and FT-IR results suggested that the aqueous gel i is stabilized by a combination of the hydrogen bonding, π-π interactions, and hydrophobic forces.

Original languageEnglish
Pages (from-to)7229-7232
Number of pages4
JournalLangmuir
Volume17
Issue number23
DOIs
Publication statusPublished - Nov 13 2001
Externally publishedYes

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Cite this

Jung, J. H., John, G., Masuda, M., Yoshida, K., Shinkai, S., & Shimizu, T. (2001). Self-assembly of a sugar-based gelator in water: Its remarkable diversity in gelation ability and aggregate structure. Langmuir, 17(23), 7229-7232. https://doi.org/10.1021/la0109516