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首页> 外文期刊>Chemistry: A European journal >Silicon-phthalocyanine-cored fullerene dendrimers: Synthesis and prolonged charge-separated states with dendrimer generations
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Silicon-phthalocyanine-cored fullerene dendrimers: Synthesis and prolonged charge-separated states with dendrimer generations

机译：硅酞菁为核心的富勒烯树枝状大分子：树枝状大分子的合成和长时间的电荷分离态

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摘要

Silicon-phthalocyanine-cored fullerodendrimers with up to eight fullerene substituents (SiPc-nC(60); n=2, 4, and 8) have been synthesized. Photo-physical properties of newly synthesized SiPc-nC(60), have been investigated by time-resolved fluorescence and transient absorption analysis with pulsed laser light. Laser photolysis measurements suggest the occurrence of a charge-separation process from (SiPc)-Si-1* to the C-60 subunits. The nanosecond transient absorption spectra in the near-IR region indicate that the lifetimes of the formed radical ion pairs are prolonged on the order of SiPc-8 C-60 > SiPc-4C(60)> SiPc-2C(60), which may be related to the electron migration among the C-60 subunits. The usefulness of SiPc-nC(60) as light-harvesting systems, evaluated as a ratio of the rates of charge recombination to those of charge separation, increases markedly with the dendrimer generation.
机译：已经合成了具有多达八个富勒烯取代基（SiPc-nC（60）; n = 2、4和8）的硅酞菁为核心的全树状大分子。通过时间分辨荧光和脉冲激光的瞬态吸收分析，研究了新合成的SiPc-nC（60）的光物理性质。激光光解测量表明，发生了从（SiPc）-Si-1 *到C-60亚基的电荷分离过程。近红外区的纳秒瞬态吸收光谱表明，形成的自由基离子对的寿命按SiPc-8 C-60> SiPc-4C（60）> SiPc-2C（60）的顺序延长。与C-60亚基之间的电子迁移有关。 SiPc-nC（60）作为光收集系统的有用性（以电荷复合速率与电荷分离速率之比评估）随树状聚合物的生成而显着增加。

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