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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Multichromophores Onto Graphene: Supramolecular Non-Covalent Approaches for Efficient Light Harvesting
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Multichromophores Onto Graphene: Supramolecular Non-Covalent Approaches for Efficient Light Harvesting

机译:石墨烯上的多发色团:高效光收集的超分子非共价方法

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摘要

The idea of attaching multiple porphyrins to graphene is explored. A charged porphyrin salt is stabilized onto exfoliated graphene by taking advantage of pi-pi* interactions, and a second porphyrin light harvester is anchored through electrostatic interactions with the former. The interactions are capable of allowing electronic communication of the second, electrostatically attached, porphyrin with graphene, effectively quenching its emission. The graphene-porphyrin-porphyrin triad is examined through optical (UV-vis, steady state and time-resolved photoluminescence) techniques, while electrochemistry is employed to study the thermodynamically favored pathways through which the interaction occurs. The porphyrin that is electrostatically stabilized onto the graphene nanoensemble shows lifetimes 1 order of magnitude faster than its pi-pi* stacked analogue suggesting a more efficient pathway.
机译:探索了将多个卟啉与石墨烯连接的想法。通过利用pi-pi *相互作用,将带电荷的卟啉盐稳定在脱落的石墨烯上,并且通过与前者的静电相互作用将第二个卟啉光收集器固定。相互作用能够使第二个静电附着的卟啉与石墨烯进行电子通讯,从而有效地抑制其发射。通过光学(紫外可见,稳态和时间分辨光致发光)技术检查石墨烯-卟啉-卟啉三联体,而电化学则用于研究发生相互作用的热力学上有利的途径。静电稳定在石墨烯纳米集合体上的卟啉的寿命比其pi-pi *堆积类似物快1个数量级,表明该途径更有效。

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