Remarkable influence of the preparation method on the gelation ability of a cholesterol-based isocyanuric acid-2,4,6-triaminopyrimidine pair. Does the formation of a 'molecular tape' contribute to the gelation?

Sang Won Jeong, Seiji Shinkai

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

The gelation system of a 1:1 mixture of cholesterol-containing isocyanuric acid (1) and cholesterol-containing 2,4,6-triaminopyrimidine (2) in organic fluids was investigated to understand the gelation mechanism. A series of gelation tests have shown that the gelation is remarkably dependent upon the cooling rate of the mixture solution as well as the nature of solvents and concentrations. The investigation using FT-IR revealed that the mismatched hydrogen-bonding interaction between (1) and (2) is responsible for the gelation and well defined hydrogen-bonding interaction such as a 'molecular tape' rather results in coprecipitation. It was confirmed by the gelation test of two-faced (1) and (2) with the complementary single-faced compounds that the gel is constructed by the three-dimensional network through an irregular hydrogen-bonding interaction.

Original languageEnglish
Pages (from-to)179-185
Number of pages7
JournalNanotechnology
Volume8
Issue number4
DOIs
Publication statusPublished - Dec 1 1997
Externally publishedYes

Fingerprint

Cholesterol
Gelation
Tapes
Acids
Hydrogen bonds
Coprecipitation
2,4,6-triaminopyrimidine
isocyanuric acid
Gels
Cooling
Fluids

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

Cite this

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abstract = "The gelation system of a 1:1 mixture of cholesterol-containing isocyanuric acid (1) and cholesterol-containing 2,4,6-triaminopyrimidine (2) in organic fluids was investigated to understand the gelation mechanism. A series of gelation tests have shown that the gelation is remarkably dependent upon the cooling rate of the mixture solution as well as the nature of solvents and concentrations. The investigation using FT-IR revealed that the mismatched hydrogen-bonding interaction between (1) and (2) is responsible for the gelation and well defined hydrogen-bonding interaction such as a 'molecular tape' rather results in coprecipitation. It was confirmed by the gelation test of two-faced (1) and (2) with the complementary single-faced compounds that the gel is constructed by the three-dimensional network through an irregular hydrogen-bonding interaction.",
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