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Tunable Fluorescence from 2D Assemblies of LnW10 and P2W18 Polyoxometalates Clusters with Quaternary Ammonium-type AIEgens |
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| Authors: | Dr. Shujian Rong Dr. Mengshi Wang Prof. Dr. Xun Wang |
| Affiliation: | 1. Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084 China These authors contributed equally to this work. Contribution: Data curation (lead), Formal analysis (lead), Investigation (lead), Methodology (lead), Writing - original draft (lead);2. The Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing, 100084 China These authors contributed equally to this work. Contribution: Data curation (equal), Formal analysis (equal), Methodology (equal);3. Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084 China |
| Abstract: | Two-dimensional (2D) AIE-inorganic nanocomposites exhibit high stability and high fluorescence activity. However, limited by the types and properties of 2D inorganic materials, it's challenging to realize complex structures and functions. We designed a quaternary ammonium-type AIE ligand, TPECholine. We chose TPECholine and POM clusters as building blocks and synthesized a series of single-layer nanosheets (SLNSs) by assembling LnW10 or P2W18 POM clusters with TPECholine. By regulating the types of POM clusters and ligands, the morphology and fluorescence intensity of the SLNSs can be finely tuned. Due to the restriction of the intramolecular motions of AIEgens by the SLNSs, nanosheets can exhibit promoted quantum yield (up to 76 %). In addition, thanks to the sub-nanometric sizes and excess surface charges, SLNSs exhibit excellent solvent compatibility, including water, chloroform, ethanol, etc. And the nanosheets showed high fluorescence intensity in these solvents. |
| Keywords: | Aggregation-Induced Emission (AIE) Nanosheets Self-Assembly Surface Modification Tunable Fluorescence |