A star in the making: Star-shaped block copolymers have been synthesized by reversible addition–fragmentation chain-transfer (RAFT) polymerization to obtain light-harvesting systems with an energy gradient from the periphery to the core. Excitation-energy transfer in the block copolymers occurs through an energy cascade from the excited acenaphthenyl units to the coumarin chromophores and hence to the RuII complex core (red sphere: see picture).
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Chen et al. (2005) studied this question.
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