Tailored amphiphilic star‐shaped light‐harvesting copolymers | Zendy

Chen Ming | Zendy; Ghiggino Kenneth P | Zendy; Thang San H | Zendy; Wilson Gerard J | Zendy

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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

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

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