Polypeptides-induced self-aggregation and tuning of emission properties of luminescent complexes

Toshiyuki Moriuchi, Masahiro Yamada, Kazuki Yoshii, Chiaki Katano, Toshikazu Hirao

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


The assembling of anionic [Au(CN) 2] - spatially along cationic β-sheeted poly-L-lysine (P(Lys)) through electrostatic and aurophilic bonding interactions was demonstrated to form the luminescent [Au(CN) 2] - aggregate, wherein negatively charged [Au(CN) 2] - was found to stabilize the β-sheet structure by suppressing repulsion between the positively charged side chains. Poly-L-glutamic acid (P(Glu)) bearing multiple negatively charged side chains was performed to serve as a polymeric spatially aligned scaffold for aggregation of the positively charged platinum(II) complexes [Pt(trpy)C≡CR](OTf) (trpy = 2,2′,6′,2″-terpyridine; R = Ph (PtH), C 6H 4C 12H 25-p (PtC 12)) through electrostatic interaction, resulting in tunable emission properties. The introduction of the cationic luminescent iridium(III) and ruthenium(II) complexes into P(Glu) as a polymeric scaffold, wherein control of the conformational change of P(Glu) was achieved, was also allowed to induce the tuning of the emission properties and energy transfer in aqueous media.

Original languageEnglish
Pages (from-to)206-214
Number of pages9
JournalMacromolecular Symposia
Issue number1
Publication statusPublished - 2012 Aug
Externally publishedYes


  • aggregation
  • emission
  • gold(I) complex
  • iridium(III) complex
  • metallophilic interaction
  • platinum(II) complex
  • poly-L-glutamic acid
  • poly-L-lysine
  • ruthenium(II) complex
  • self-association

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry


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