Yu Longyue, Huang Xionghui, Feng Ning, Fu Wenwen, Xin Xia, Hao Jingcheng, Li Hongguang
Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, China.
China Research Institute of Daily Chemical Industry, Taiyuan, Shanxi 030001, China.
J Phys Chem Lett. 2025 Feb 6;16(5):1305-1311. doi: 10.1021/acs.jpclett.4c03518. Epub 2025 Jan 28.
Multi-step Förster resonance energy transfer (FRET) plays a vital role in photosynthesis. While the energy transfer efficiency (Φ) of a naturally occurring system can reach 95%, that of most artificial light-harvesting systems (ALHSs) is still limited. Herein, we propose a strategy to construct highly efficient ALHSs using a blue-emitting, supercooled ionic compound of naphthalimide (NPI) as the donor, a green-emitting BODIPY derivate as a relay acceptor, and a commercially available, red-emitting dye [rhodamine B (RhB)] as the final acceptor. The broad emission of the fluid donor can overlap simultaneously with the absorption of BODIPY and RhB, enabling the occurrence of a sequential FRET from NPI to BODIPY to RhB as well as a parallel FRET directly from NPI to RhB. These two complementary energy transfer routes lead to an overall Φ up to 97.4%, which is the champion among all of the reported ALHSs and is also higher than that found in plants and photosynthetic bacteria. This strategy is universal, and Φ of the system could be further improved by optimizing the structures of the fluid donor and relay acceptor.
多步Förster共振能量转移（FRET）在光合作用中起着至关重要的作用。虽然天然存在的系统的能量转移效率（Φ）可以达到95%，但大多数人工光捕获系统（ALHSs）的能量转移效率仍然有限。在此，我们提出了一种策略，以一种蓝色发光的萘酰亚胺超冷离子化合物（NPI）作为供体，一种绿色发光的BODIPY衍生物作为中继受体，以及一种市售的红色发光染料[罗丹明B（RhB）]作为最终受体，来构建高效的ALHSs。流体供体的宽发射可以同时与BODIPY和RhB的吸收重叠，使得能够发生从NPI到BODIPY再到RhB的顺序FRET以及直接从NPI到RhB的平行FRET。这两条互补的能量转移途径导致总体Φ高达97.4%，这在所有已报道的ALHSs中是最高的，并且也高于在植物和光合细菌中发现的效率。这种策略具有通用性，并且通过优化流体供体和中继受体的结构可以进一步提高系统的Φ。
