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Polypeptides‐Induced Self‐Aggregation and Tuning of Emission Properties of Luminescent Complexes
Author(s) -
Moriuchi Toshiyuki,
Yamada Masahiro,
Yoshii Kazuki,
Katano Chiaki,
Hirao Toshikazu
Publication year - 2012
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201200003
Subject(s) - cationic polymerization , luminescence , chemistry , side chain , terpyridine , polyelectrolyte , iridium , ruthenium , aqueous solution , aggregation induced emission , polymer chemistry , self assembly , crystallography , stereochemistry , metal , materials science , polymer , organic chemistry , fluorescence , catalysis , physics , optoelectronics , quantum mechanics
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)CCR](OTf) (trpy = 2,2′,6′,2″‐terpyridine; R = Ph ( PtH ), C 6 H 4 C 12 H 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.