Department of Chemistry and Center for Macromolecular Science and Engineering, University of Florida , P.O. Box 117200, Gainesville, Florida 32611-7200, United States.
J Phys Chem B. 2014 Jan 9;118(1):372-8. doi: 10.1021/jp411565p. Epub 2013 Dec 20.
Energy transfer along a nonconjugated polymer chain is studied with a polystyrene-based copolymer of oligo(phenylene-ethynylene) (OPE) donor and thiophene-benzothiadiazole (TBT) acceptor pendants. The graft copolymers are prepared from reversible addition-fragmentation transfer polymerization (RAFT) and copper(I)-catalyzed azide-alkyne "click" reaction. The singlet energy transfer from donor to accept is studied via fluorescence emission and ultrafast transient absorption spectroscopy. Near unity quenching of the OPE excited state by the TBT moiety occurs on multiple time scales (2-50 ps) dependent on where the initial exciton is formed on the polymer.
研究了基于聚苯乙烯的寡聚（对苯乙炔）（OPE）给体和噻吩-苯并噻二唑（TBT）受体侧链的共聚物中能量沿着非共轭聚合物链的转移。接枝共聚物是通过可逆加成-断裂链转移聚合（RAFT）和铜（I）催化的叠氮化物-炔烃“点击”反应制备的。通过荧光发射和超快瞬态吸收光谱研究了从给体到受体的单重态能量转移。TBT 部分几乎完全猝灭 OPE 激发态，这取决于初始激子在聚合物上的形成位置，猝灭发生在多个时间尺度（2-50 ps）上。
