ATP as building blocks for the self-assembly of excitonic nanowires

Masa-Aki Morikawa, Masakuni Yoshihara, Takeshi Endo, Nobuo Kimizuka

Research output: Contribution to journalArticlepeer-review

77 Citations (Scopus)

Abstract

Supramolecular nanowires are specifically self-assembled from adenosine 5′-triphosphate (ATP) and dichloro-substituted thiacarbocyanine dyes. Spectral blue-shift and induced circular dichroism with exciton coupling are observed upon mixing the dye and ATP molecules in water. These observations indicate the formation of chiral 1/ATP supramolecular assemblies with excitation energy delocalized in the parallel-oriented (H-aggregated) chromophores. Interestingly, formation of H-aggregates is facilitated most in the presence of ATP and not by other nucleotides (ADP or AMP). In electron microscopy, aqueous 1/ATP mixture gives developed nanowires with a minimum width of ca. 10 nm and lengths of several micrometers. The ATP-directed nanowires exhibit reversible thermal self-assembly accompanied by supramolecular thermochromism. This is the first example of ATP-based supramolecular nanoassemblies, and the use of small biomolecules as building blocks for functional supermolecules provides a new perspective in the design of bio-nanomaterials.

Original languageEnglish
Pages (from-to)1358-1359
Number of pages2
JournalJournal of the American Chemical Society
Volume127
Issue number5
DOIs
Publication statusPublished - Feb 9 2005

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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