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首页> 外文期刊>Chemistry: A European journal >Axially Substituted Silicon Phthalocyanine as Electron Donor in a Dyad and Triad with Azafullerene as Electron Acceptor for Photoinduced Charge Separation
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Axially Substituted Silicon Phthalocyanine as Electron Donor in a Dyad and Triad with Azafullerene as Electron Acceptor for Photoinduced Charge Separation

机译：轴向取代酞菁硅作为双电子体中的电子给体，并以氮杂富勒烯为电子受体进行光致电荷分离

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摘要

The synthesis of a donor-acceptor silicon phthalocyanine (SiPc)-azafullerene (C59N) dyad 1 and of the first acceptor- donor-acceptor C59N-SiPc-C59N dumbbell triad 2 was accomplished. The two C59N-based materials were comprehensively characterized with the aid of NMR spectroscopy, MALDI-MS as well as DFT calculations and their redox and photophysical properties were evaluated with CV and steady-state and time-resolved absorption and photoluminescence spectroscopy measurements. Notably, femtosecond transient absorption spectroscopy assays revealed that both dyad 1 and triad 2 undergo, after selective photoexcitation of the SiPc moiety, photoinduced electron transfer from the singlet excited state of the SiPc moiety to the aza-fullerene counterpart to produce the charge-separated state, with lifetimes of 660 ps, in the case of dyad 1, and 810 ps, in the case of triad 2. The current results are expected to have significant implications en route to the design of advanced C59N-based donor-acceptor systems targeting energy conversion applications.
机译：完成了供体-受体硅酞菁（SiPc）-氮杂富勒烯（C59N）二元化合物1和第一受体-供体-受体C59N-SiPc-C59N哑铃三元组2的合成。借助NMR光谱，MALDI-MS以及DFT计算，对两种基于C59N的材料进行了全面表征，并通过CV以及稳态和时间分辨吸收和光致发光光谱测量评估了它们的氧化还原和光物理性质。值得注意的是，飞秒瞬态吸收光谱分析表明，在对SiPc部分进行选择性光激发之后，二元组1和三元组2都经历了光诱导电子从SiPc部分的单重激发态到氮杂富勒烯对应物的转移，从而产生了电荷分离态，对于二元组1，寿命为660 ps，对于三元组2，寿命为810 ps。目前的结果有望对设计基于能量的基于C59N的先进供体-受体系统产生重大影响。转换应用程序。

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