Premium
Tailored amphiphilic star‐shaped light‐harvesting copolymers
Author(s) -
Chen Ming,
Ghiggino Kenneth P,
Thang San H,
Wilson Gerard J
Publication year - 2006
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1911
Subject(s) - copolymer , chain transfer , amphiphile , chromophore , polymerization , raft , polymer , photochemistry , materials science , polymer chemistry , excited state , ruthenium , reversible addition−fragmentation chain transfer polymerization , solubility , chemistry , radical polymerization , organic chemistry , physics , catalysis , nuclear physics , composite material
Abstract Amphiphilic star‐shaped light‐harvesting copolymers comprising six diblock arms of styryl coumarin (St‐Coumarin) and N ‐isopropylacrylamide (NIPAM) surrounding a ruthenium( II ) tris(bipyridyl) energy‐trap core have been synthesized by reversible addition‐fragmentation chain transfer (RAFT) polymerization. The mechanism of excitation energy transfer (EET) from initially excited St‐Coumarin chromophores to the Ru( II ) trap has been investigated and is concluded to occur mainly through a single‐step induced dipole–dipole process. Incorporation of the NIPAM sequences results in enhanced EET efficiencies and confers water solubility to the polymers. The photophysical behavior of the copolymers is reported; marked differences are exhibited in aqueous solution when compared to organic solutions. Copyright © 2005 Society of Chemical Industry