Visible-Light Photoinduced Electron Transfer Promoted by Cucurbit[8]uril-Enhanced Charge Transfer Interaction: Toward Improved Activity of Photocatalysis
Visible-Light Photoinduced Electron Transfer Promoted by Cucurbit[8]uril-Enhanced Charge Transfer Interaction: Toward Improved Activity of Photocatalysis
复制标题
葫芦[8]脲增强电荷转移作用促进可见光诱导电子转移：提高光催化活性
DOI：
10.1021/acsami.7b07026
复制
发表时间：
2017-07-12
影响因子：
9.5
通讯作者：
Zhang, Xi
中科院分区：
文献类型：
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作者：
Jiao, Yang;Xu, Jiang-Fei;Zhang, Xi
可见光诱导电子转移（Vis-PET）在光电子器件和光氧化还原催化中具有重要的应用价值。在此，我们提出了一种超分子策略，以促进Vis-PET过程中的电荷转移（CT）的相互作用。作为概念的证明，设计含有1，S-烷氧基取代的萘和紫精部分的分子系统以在水中形成CT复合物。HOMO/LUMO能隙（2）通过CT相互作用降低，这开启了Vis-PET过程以产生紫精自由基阳离子。此外，当通过葫芦[8]脲增强CT相互作用时，Vis-PET过程的效率进一步提高，并且所需的照射波长可以进一步红移100 nm。Vis-PET系统表现出改善的活性，如由细胞色素c的快速光还原所支持的。该研究代表了一种在温和条件下制备具有活性的自由基的简便的超分子方法，其具有通过合理利用CT系统来丰富可见光光氧化还原催化范围的潜力。
Visible-light photoinduced electron transfer (Vis-PET) is highly important for optoelectronic devices and photoredox catalysis. Herein, we propose a supramolecular strategy to promote the Vis-PET process by charge transfer (CT) interactions. As a proof of concept, a molecular system containing 1,S-alkoxy-substituted naphthalene and viologen moieties was designed to form a CT complex, in water. The HOMO/LUMO energy gap was (2) lowered by CT interaction, which turned on the Vis-PET process to generate viologen radical cations. Moreover, when CT interaction was enhanced by cucurbit[8]uril, the efficiency of the Vis-PET process was further promoted and the required irradiation wavelength could be further red-shifted by 100 nm. The Vis-PET system exhibited an improved activity of photocatalysis, as supported by the fast photoreduction of Cytochrorne c. This study represents a facile supramolecular way to fabricate radicals with maintained activity under mild conditions, which holds potential to enrich the scope of visible-light photoredox catalysis by the rational utilization of CT systems.