Artificial Light-Harvesting System with White-Light Emission in a Bicontinuous Ionic Medium.
Artificial Light-Harvesting System with White-Light Emission in a Bicontinuous Ionic Medium.
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DOI：
10.1021/acs.jpclett.2c02314
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发表时间：
2022-09
期刊：
影响因子：
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通讯作者：
Geping Zhang;Longyue Yu;Jingfei Chen;Renhao Dong;N. Godbert;Hongguang Li;J. Hao
中科院分区：
文献类型：
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作者：
Geping Zhang;Longyue Yu;Jingfei Chen;Renhao Dong;N. Godbert;Hongguang Li;J. Hao
与Förster共振能量转移（FRET）密切相关的人工捕光系统（ALHS）是过去几十年来最具吸引力的科学课题之一。具体地，由流体供体和受体组成的二元ALHS具有简化的组成和高的供体单元数密度。然而，很大程度上由于难以获得流体供体，对这些系统的研究仍然相当有限，特别是对于离子系统。在此，我们报告了一种新型的二元ALHS使用离子萘二甲酰亚胺（NPI）衍生物作为供体，这表明大大改善其双连续液体结构的光致发光。当与受体如罗丹明6 G或反式-4-[4-（二甲氨基）苯乙烯基]-甲基吡啶碘化物混合时，有效的FRET被实验结果和分子动力学模拟所证实，能量转移效率高达约90%。可调颜色，包括白光发射，是通过调整受体/供体的比例，打开了大门，为各种应用，如发光二极管和光致发光油墨。
Artificial light-harvesting systems (ALHSs), which are closely related to Förster resonance energy transfer (FRET), are among the most attractive scientific topics during the past few decades. Specifically, binary ALHSs that are composed of a fluid donor and acceptor have a simplified composition and high number density of the donor units. However, largely due to the difficulty in obtaining a fluid donor, investigation of these systems is still quite limited, especially for the ionic systems. Herein, we report a new type of binary ALHS using an ionic naphthalimide (NPI) derivative as a donor, which shows greatly improved photoluminescence for its bicontinuous liquid structure. When blending with an acceptor such as rhodamine 6G or trans-4-[4-(dimethylamino)styryl]-methylpyridinium iodide, efficient FRET was confirmed by both experimental results and molecular dynamics simulations, with an energy transfer efficiency up to ∼90%. Tunable color, including white-light emission, was achieved by tuning the acceptor/donor ratio, opening the door for a variety of applications such as light-emitting diodes and photoluminescent inks.