A Phthalocyanine Dendrimer Capable of Forming Spherical Micelles

Takamichi Uchiyama, Kazuyuki Ishii, Taro Nonomura, Nagao Kobayashi, Seiji Isoda

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

A novel and intrinsically spherical micelle has been prepared by utilizing a silicon phthalocyanine ((WG3)SiPc) that has a thin hydrophobic alkyl chain and a bulky hydrophilic poly(aryl ether) dendrimer with terminal carboxyl groups, as its two axial ligands. Gel-permeation chromatography and cryo-transmission electron microscopic experiments indicate that (WG3)SiPcs self-assemble to form a spherical micelle at very low concentrations in aqueous solution. Depending on the pH of the aqueous phase, (WG3)SiPc shuttles between aqueous and organic phases. In the presence of hydrophobic molecules, this transfer is accompanied by the inclusion of these (guest) molecules, indicating that the micelle acts as a molecular capsule with a nanospace surrounded by functional phthalocyanine planes.

Original languageEnglish
Pages (from-to)5757-5761
Number of pages5
JournalChemistry - A European Journal
Volume9
Issue number23
DOIs
Publication statusPublished - 2003 Dec 5

Keywords

  • Dendrimers
  • Micelles
  • Molecular capsules
  • Phthalocyanines
  • Self-assembly

ASJC Scopus subject areas

  • Catalysis
  • Organic Chemistry

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