Hu Xiaoyu / Wang leyong research group of Nanjing University has made progress in building artificial light capture system with secondary energy transfer based on supramolecular assembly

Recently, Hu Xiaoyu / Wang leyong, team of supramolecular chemistry and intelligent materials, School of chemistry and chemical engineering, Nanjing University, made preliminary progress in the construction of artificial light capture system with secondary energy transfer based on supramolecular assembly for photochemical catalysis research The research results were published in angel Chem Int ed (DOI: 10.1002 / anie 201912654) under the title of "a supramolecular artificial light harvesting system with two step sequential energy transfer for photochemical catalyst" Hao min, a master's degree student, is the first author of this paper Sun Guangping, a doctoral student, and Zuo minzan have made important contributions to the completion of this paper The work was completed under the guidance of Professor Hu Xiaoyu and Professor Wang leyong Light capture system plays an important role in the process of natural photosynthesis, which is of great significance in biological imaging, light-emitting devices, photocatalysis and solving the energy problems facing human beings At present, a series of progress has been made in building an efficient artificial light capture system in the water phase However, in order to better simulate and understand the optical capture antenna system characterized by multi-channel information communication in nature, it is still a challenging work to build an artificial light capture system with multi-step energy transfer characteristics and to realize the conversion of light energy to chemical energy Guo Shuwen, Ph.D student of the team of supramolecular chemistry and intelligent materials, reported earlier on the construction of supramolecular artificial light capture system based on single-step energy transfer process (angelw Chem Int ed., 2018, 57, 3163-3167) On this basis, Hao min, a master's degree candidate, constructed an artificial light capture system with two consecutive steps of energy transfer in the aqueous phase by using the amphiphilic guest molecule tpeda, water-soluble host macrocyclic aromatic hydrocarbon (wp5) and hydrophobic dye Eosin Y (esy) / Nile red (NIR), and used it in efficient photochemical catalytic dehalogenation On the basis of host guest interaction, the amphiphilic molecules tpeda and wp5 form supramolecular amphiphilic, and then form supramolecular nano assembly by further orthogonal assembly, which significantly improves the aggregation induced luminescence (AIE effect) of molecular tpeda Nano assembly can pack esy into hydrophobic layer and act as energy donor to realize high-efficiency primary energy transfer from tpeda to esy; because of energy matching, it can further realize the secondary energy transfer process from wp5 É tpeda-esy to NIR It is important that the artificial light capture system can be used as nano reactor and high efficient catalyst to catalyze the dehalogenation of α - bromoacetophenone, and the yield can reach 96% in water phase.