SWNT-Based Supramolecular Nanoarchitectures with Photosensitizing Donor and Acceptor Molecules
SWNT-Based Supramolecular Nanoarchitectures with Photosensitizing Donor and Acceptor Molecules
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DOI：
10.1021/jz1009407
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发表时间：
2010-09-02
影响因子：
5.7
通讯作者：
Ito, Osamu
中科院分区：
文献类型：
--
作者：
D'Souza, Francis;Sandanayaka, Atula S. D.;Ito, Osamu
利用光敏供体和受体分子构建的基于单壁碳纳米管（SWNT）的超分子纳米结构揭示了高效的光诱导电荷分离，从而发挥了光能收集光伏电池和开发新型光催化剂所需的功能材料的作用。各种基于swnt -芘pi-pi相互作用的自组装策略被开发出来，以寻找具有更好光化学、光伏和光催化性能的双层swnt基纳米杂化物。在电子给体敏化剂（如卟啉）存在的情况下，从给体到单壁碳纳米管的电荷分离开始，而在电子受体（如富勒烯）存在的情况下，单壁碳纳米管在可见光照射下给光激发的富勒烯受体一个电子。在这两种情况下，在电子介质和牺牲电子供体的存在下，这些SWNT分子纳米杂化体进行光催化反应。通过利用尺寸选择性半导体单壁碳纳米管，也可以证明带隙依赖的电荷分离效率和光伏电流。
Single-wall carbon nanotube (SWNT)-based supramolecular nanoarchitectures constructed using photosensitizing donor and acceptor molecules reveal efficient photoinduced charge separation, thus carrying out the role,of functional materials desired for light-energy-harvesting photovoltaic cells and development of novel photocatalysts. Various self-assembly strategies based on the SWNT-pyrene pi-pi interaction are developed in a search for double-decker SWNT-based nanohybrids revealing better photochemical, photovoltaic, and photocatalytic properties. In the presence of electron-donor sensitizers such as porphyrins, charge separation is initiated from the donor to SWNT, whereas in the presence of electron acceptors such as fullerenes, the SWNT donates an electron to the photoexcited fullerene acceptor under visible light irradiation. For both cases, in the presence of electron mediators and sacrificial electron donors, these SWNT molecular nanohybrids undergo photocatalytic reaction. It has also been possible to demonstrate the band-gap-dependent charge separation efficiencies and photovoltaic currents by utilizing the size selective semiconducting SWNTs.