期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 27, 页码 22635-22640出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b07026
关键词
photoinduced electron transfer; charge transfer interaction; host-guest interaction; photoredox catalysis; energy levels
资金
- National Basic Research Program [2013CB834502]
- Foundation for Innovative Research Groups of NSFC [21421064]
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.
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