Supramolecular polymers based on host-guest interactions for the construction of artificial light-harvesting systems
Wang, Y.; Xu, J.; Wang, R.; Liu, H.; Yu, S.; Xing, L.-B.
Spectrochimica Acta. Part a Molecular and Biomolecular Spectroscopy 279: 121402
In the present work, artificial light-harvesting systems with a fluorescence resonance energy transfer (FRET) process were successfully obtained in the aqueous solution. We designed and synthesized an amphiphilic pyrene derivative with two 4-vinylpyridium arms (Pmvb), which can interact with cucurbituril (CB) to form supramolecular polymer through host-guest interactions in aqueous solution. The formation of supramolecular polymers results in a significant enhancement of fluorescence, which makes Pmvb-CB an ideal energy donor to construct artificial light-harvesting systems in the aqueous solution. Subsequently, two different fluorescence dyes Rhodamine B (RhB) and Sulforhodamine 101 (SR101) were introduced as energy acceptors into the solution of Pmvb-CB respectively, to fabricate two different artificial light-harvesting systems. The obtained artificial light-harvesting systems can achieve an efficient energy transfer process from Pmvb-CB to RhB or SR101 with high energy transfer efficiency.