一种菁染料轮烷卟啉纳米环配合物作为光捕获系统的模型
A cyanine dye rotaxane porphyrin nanoring complex as a model light harvesting system
摘要：
纳米环轮烷超分子组装，与Cy7花青染料（六甲基吲哚三碳菁）线程沿纳米环的轴，已被合成作为模型的捕光复合物LH 1和紫色细菌光合作用的反应中心之间的能量转移。该配合物显示出从中心花青染料到周围锌卟啉纳米环的有效能量转移。我们提出了一个理论模型，再现的纳米环的吸收光谱和量化的纳米环和中央染料之间的激子耦合，解释有效的能量转移和阐明与结构相关的自然光捕获系统的相似性。
英文摘要：
A nanoring-rotaxane supramolecular assembly, with a Cy7 cyanine dye (hexamethylindotricarbocyanine) threaded along the axis of the nanoring, has been synthesized as a model for the energy transfer between the light harvesting complex LH1 and the reaction center in purple bacteria photosynthesis. The complex displays efficient energy transfer from the central cyanine dye to the surrounding zinc porphyrin nanoring. We present a theoretical model that reproduces the absorption spectrum of the nanoring and quantifies the excitonic coupling between the nanoring and the central dye, explaining the efficient energy transfer and elucidating the similarity with structurally related natural light harvesting systems.
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