Water-soluble fluorescent supramolecular polymer network with sustainable “Fluorescence on” based on AIEgen-containing host-guest interactions
Yabi Yang,
Shuang Liu,
Hui Liu,
Qingyun Li,
Hanwei Zhang,
Ziqing Hu,
Xiang Lu,
Xiaofan Ji
Affiliations
Yabi Yang
Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074 (P.R. China)
Shuang Liu
Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074 (P.R. China)
Hui Liu
Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074 (P.R. China)
Qingyun Li
Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074 (P.R. China)
Hanwei Zhang
Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074 (P.R. China)
Ziqing Hu
Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074 (P.R. China)
Xiang Lu
Corresponding author.; Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074 (P.R. China)
Xiaofan Ji
Corresponding author.; Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074 (P.R. China)
Inspired by miraculous bioluminescence phenomena, many synthetic water-soluble fluorescent supramolecular polymer networks (WFSPNs) have attracted wide attention. Up to now, WFSPNs could be divided into two categories on a basis of aggregation-caused quenching (ACQ) effect or aggregation-induced emission (AIE) effect, respectively. However, these two kinds of WFSPNs could only be emissive at partial crosslinking degrees. Herein, we constructed WFSPNs with sustainable “fluorescence on” property. Firstly, cyanostilbene molecule ZPP with AIE property and cyanostilbene-based polymer 4APEG-ZPP were synthesized. Then γ-CD was added into the aqueous solution of 4APEG-ZPP to self-assemble into WFSPNs. This self-assembled process was based on host-guest interactions driven by the hydrophobic interactions. Upon adding γ-CD into the aqueous solution of 4APEG-ZPP, yellow fluorescence was emitted on account of cyanostilbene groups in 4APEG-ZPP tending to form a “dimer” through intermolecular interactions, like π-π stacking and CN∙∙∙π. Moreover, green fluorescence emitted by WFSPNs could be seen with the larger amount of γ-CD being mixed into the 4APEG-ZPP aqueous solution on account of the increase of crosslinking degrees. Obviously, the fluorescence wassustainable with the concentration of γ-CD increasing. Therefore, this system realized the sustainable “fluorescence on” property during the transformation from polymers to networks.
