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 journalArticle

2 Citations (Scopus)

Abstract

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
Volume317-318
Issue number1
DOIs
Publication statusPublished - 2012 Aug
Externally publishedYes

Fingerprint

glutamic acid
Polypeptides
polypeptides
Glutamic Acid
Agglomeration
Tuning
tuning
Scaffolds
Peptides
Acids
Bearings (structural)
electrostatic bonding
Iridium
Ruthenium
lysine
assembling
Coulomb interactions
iridium
Platinum
Energy transfer

Keywords

  • 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

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

Cite this

Polypeptides-induced self-aggregation and tuning of emission properties of luminescent complexes. / Moriuchi, Toshiyuki; Yamada, Masahiro; Yoshii, Kazuki; Katano, Chiaki; Hirao, Toshikazu.

In: Macromolecular Symposia, Vol. 317-318, No. 1, 08.2012, p. 206-214.

Research output: Contribution to journalArticle

Moriuchi, Toshiyuki ; Yamada, Masahiro ; Yoshii, Kazuki ; Katano, Chiaki ; Hirao, Toshikazu. / Polypeptides-induced self-aggregation and tuning of emission properties of luminescent complexes. In: Macromolecular Symposia. 2012 ; Vol. 317-318, No. 1. pp. 206-214.
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