Fluorescent H-Aggregate Vesicles and Tubes of a Cyanine Dye and Their Potential as Light-Harvesting Antennae
Fluorescent H-Aggregate Vesicles and Tubes of a Cyanine Dye and Their Potential as Light-Harvesting Antennae
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花青染料的荧光氢聚集囊泡和管及其作为光捕获天线的潜力
DOI：
10.1021/acs.jpcb.1c04262
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Fang, Jiyu
中科院分区：
文献类型：
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作者：
Reddy, Nitin Ramesh;Aubin, Megan;Kushima, Akihiro;Fang, Jiyu
π-共轭染料的H-聚集体是有序的超分子结构。然而，H-聚集体的非荧光行为极大地限制了它们的潜在应用。在本文中，我们报道了通过在氨/甲醇混合物中自组装3,3'-二乙基硫杂羰花青碘化物(DiSC2(3))形成具有囊状和管状形态的荧光H聚集体。从H-聚集体囊泡到H-聚集体管的转变可以通过增加混合物中甲醇的体积分数来实现。 H-聚集体囊泡和管显示出两个蓝移吸收带和强荧光，这是由于 DiSC2(3) 分子的倾斜排列造成的。此外，通过在合成尿液中添加多巴胺（DA）-醌（受体）与H-聚集囊泡或管形成光捕获复合物。我们的结果表明，H-聚集管在将激发电子转移到 DA-醌受体方面比 H-聚集囊泡更有效。
H-aggregates of π-conjugated dyes are an ordered supramolecular structure. However, the non-fluorescence behavior of H-aggregates greatly limits their potential applications. In this paper, we report the formation of fluorescent H-aggregates with vesicular and tubular morphologies by the self-assembly of 3,3′-diethylthiacarbocyanine iodide (DiSC2(3)) in ammonia/methanol mixtures. The transition from H-aggregate vesicles to H-aggregate tubes can be achieved by increasing the volume fraction of methanol in the mixtures. H-aggregate vesicles and tubes show two blue-shifted absorption bands and strong fluorescence, which result from the inclined arrangement of DiSC2(3) molecules. Furthermore, light-harvesting complexes are formed by adding dopamine (DA)-quinone (acceptor) in synthetic urine with H-aggregate vesicles or tubes. Our results show that H-aggregate tubes are more efficient than H-aggregate vesicles in transferring excited electrons to DA-quinone acceptors.