Yu Longyue, Liu Hailong, Feng Ning, Yi Gang, 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.
Shandong Key Laboratory of Advanced Organosilicon Materials and Technologies, Zibo, 256401, China.
Adv Sci (Weinh). 2024 Aug;11(31):e2402565. doi: 10.1002/advs.202402565. Epub 2024 Jun 18.
Light-harvesting is of vital importance for many events, such as photosynthesis. To efficiently gather and transfer solar energy, delicate antenna is needed, which has been achieved by algae and plants. However, construction of efficient light-harvesting systems using multiple, artificial building blocks is still challenging. Here, blue-emitting organosilicone capsules containing carbon dots (denoted as CDs-Si) in ethanol are prepared, which can effectively transfer energy to green-emitting (silicone-functionalized bodipy, Si-BODIPY) or red-emitting (rhodamine b, RhB) dyes. In ternary system, sequential Förster resonance energy transfer from CDs-Si to Si-BODIPY and further to RhB is realized, which is accompanied with a less pronounced, parallel FRET directly from CDs-Si to RhB. The overall efficiency of energy transfer reaches ≈86%. By introducing a photoswitch (1,2-bis(2,4-dimethyl-5-phenyl-3-thienyl)-3,3,4,4,5,5-hexafluoro-1-cyclopentene, DAE) to the system, the emission becomes switchable under alternative illumination with UV and visible light, leading to the formation of smart artificial light-harvesting systems.
光捕获对于许多过程（如光合作用）至关重要。为了有效地收集和传递太阳能，需要精巧的天线，藻类和植物已经实现了这一点。然而，使用多种人工构建模块构建高效的光捕获系统仍然具有挑战性。在此，制备了在乙醇中含有碳点（表示为CDs-Si）的蓝色发光有机硅胶囊，其可以有效地将能量转移到绿色发光（硅氧烷功能化的氟硼二吡咯，Si-BODIPY）或红色发光（罗丹明b，RhB）染料。在三元体系中，实现了从CDs-Si到Si-BODIPY并进一步到RhB的顺序Förster共振能量转移，同时伴随着从CDs-Si直接到RhB的不太明显的平行FRET。能量转移的总效率达到约86%。通过向体系中引入光开关（1,2-双（2,4-二甲基-5-苯基-3-噻吩基）-3,3,4,4,5,5-六氟-1-环戊烯，DAE），在紫外光和可见光交替照射下发射变得可切换，从而形成智能人工光捕获系统。
