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Excitation Energy Transfer by Electron Exchange via Two-Step Electron Transfer between a Single-Walled Carbon Nanotube and Encapsulated Magnesium Porphyrin
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2020-08-21 , DOI: 10.1021/acs.jpcc.0c06766 Takeshi Koyama 1 , Junpei Sugiura 1 , Tomonari Koishi 1 , Ryosuke Ohashi 1 , Koji Asaka 1 , Takeshi Saito 2 , Yanlin Gao 3 , Susumu Okada 3 , Hideo Kishida 1
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2020-08-21 , DOI: 10.1021/acs.jpcc.0c06766 Takeshi Koyama 1 , Junpei Sugiura 1 , Tomonari Koishi 1 , Ryosuke Ohashi 1 , Koji Asaka 1 , Takeshi Saito 2 , Yanlin Gao 3 , Susumu Okada 3 , Hideo Kishida 1
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Because of the strong photoabsorption of porphyrin and its derivatives in the visible light region, composites of porphyrin–carbon nanotubes show promise as materials for photovoltaic and photoenergy transfer applications. Studies have reported the photoexcited states of functionalized carbon nanotube composites containing externally attached porphyrin. However, the photoexcited states of carbon nanotube composites containing encapsulated porphyrin moieties have not been investigated. The enhancement of photostability and chemical stability of porphyrins, which is crucial in device applications, is expected in these composites. In this study, we fabricated a composite of single-walled carbon nanotubes and encapsulated porphyrins to investigate ultrafast relaxation dynamics of photoexcited states by steady-state measurements and femtosecond time-resolved measurements. We found that excitation energy transfer by electron exchange via two-step electron transfer between the encapsulated porphyrin and single-walled carbon nanotube occurs in the femtosecond regime. This study provides an insight into photovoltaic functionality and photoenergy transfer in molecule-encapsulating materials.
中文翻译：
通过单壁碳纳米管和包封的镁卟啉之间的两步电子转移通过电子交换进行激发能转移
由于卟啉及其衍生物在可见光区域具有很强的光吸收性，因此卟啉-碳纳米管的复合材料有望成为光伏和光能转移应用的材料。研究报道了含有外部连接的卟啉的功能化碳纳米管复合材料的光激发态。然而，尚未研究包含封装的卟啉部分的碳纳米管复合材料的光激发态。这些复合材料有望提高卟啉的光稳定性和化学稳定性，这在设备应用中至关重要。在这个研究中，我们制造了单壁碳纳米管和封装的卟啉的复合材料，以通过稳态测量和飞秒时间分辨测量来研究光激发态的超快弛豫动力学。我们发现，在飞秒状态下，通过卟啉和单壁碳纳米管之间的两步电子转移通过电子交换进行激发能转移。这项研究提供了分子封装材料中光伏功能和光能转移的见解。
更新日期：2020-09-03
中文翻译：
通过单壁碳纳米管和包封的镁卟啉之间的两步电子转移通过电子交换进行激发能转移
由于卟啉及其衍生物在可见光区域具有很强的光吸收性，因此卟啉-碳纳米管的复合材料有望成为光伏和光能转移应用的材料。研究报道了含有外部连接的卟啉的功能化碳纳米管复合材料的光激发态。然而，尚未研究包含封装的卟啉部分的碳纳米管复合材料的光激发态。这些复合材料有望提高卟啉的光稳定性和化学稳定性，这在设备应用中至关重要。在这个研究中，我们制造了单壁碳纳米管和封装的卟啉的复合材料，以通过稳态测量和飞秒时间分辨测量来研究光激发态的超快弛豫动力学。我们发现，在飞秒状态下，通过卟啉和单壁碳纳米管之间的两步电子转移通过电子交换进行激发能转移。这项研究提供了分子封装材料中光伏功能和光能转移的见解。
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