Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China.
Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266061, China.
J Phys Chem Lett. 2022 Oct 6;13(39):8999-9006. doi: 10.1021/acs.jpclett.2c02314. Epub 2022 Sep 23.
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 -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.
人工光捕获系统（ALHSs）与Förster 共振能量转移（FRET）密切相关，是过去几十年中最具吸引力的科学课题之一。具体来说，由流体供体和受体组成的二元 ALHSs 具有简化的组成和高供体单元的数密度。然而，主要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，我们报告了一种使用离子萘酰亚胺（NPI）衍生物作为供体的新型二元 ALHS，由于其双连续液体结构，其光致发光得到了极大的改善。当与罗丹明 6G 或 4-[4-（二甲基氨基）-1-丁烯基]甲基吡啶碘化物等受体混合时，通过实验结果和分子动力学模拟证实了有效的 FRET，能量转移效率高达约 90%。通过调节受体/供体比可以实现可调颜色，包括白色发光，为发光二极管和荧光油墨等各种应用开辟了道路。
