Chiral coordination cages can be used in enantioselective analysis, sensing and symmetric catalysis. In general, chiral coordination cages can be synthesized by starting from enantiopure ligands / metal-organic precursors or by the determination of association / modification with chiral additives. Due to the small size of the houses and their small holes, the host-guest chemical properties of the lanthanide-organic baskets need to be investigated, especially because of the noncovalent host-guest interaction, the stereoselective synthesis of lanthanide-organic compounds induced by the chiral agent. The model is not provided.
In a study published in Journal of the American Chemical Society, the research group led by Prof. Sun Qingfu from Fujian Institute of Research on the Structure of Matter of the Chinese Academy of Sciences reported on the introduction to visitors and the chiral induction of tetrahedral lanthanide films.
In the first study, the researchers found that interligand π-π stacking plays an important role in the formation of lanthanide-organic sandwich structures. For this reason, in this study, they carried out a controlled synthesis of lanthanide-organic tetrahedral cages by inserting electron-rich foreign molecules to eliminate the π-π binding effect between the ligands.
The researchers found one glass windows of eight visitor halls, accurately verified the communication technology between the host and the visitor, and recorded the maximum number of visitors. Other by nuclear magnetic resonance (NMR) titration.
The volume count has been shown to be based on a single-crystal arrangement that has a rich coupling arrangement of lanthanide ions to provide tetrahedral lanthanide-organic structures with holes that constantly change the substrate-adaptive.
Photochemical and photophysical experiments have shown that pyrene does not bind to the EU.4L4 The cage not only suppressed its excimer release but also made it easier to convert host-guest energy.
In addition, the researchers observed the incorporation of chiral in the lanthanide tetrahedral cages when enantiopure biphenol templates were used, evoking a luminescent polarized Eu main.4L4 cages, with high glum dissymmetry values up to ± 0.125, and obtained chiral transcription from small mole chirality to supramolecular topological chirality.
This study provides a new method for the synthesis of chiral lanthanide-organic compounds, and for the sensitized luminescence of lanthanide-organic crystals in relation to the transmission of host energy.
Hexameric lanthanide-organic capsules with tertiary structure, emerging activities
Shao-Jun Hu et al, Alien-led Independent Association and Chiral Induction of Photofunctional Lanthanide Tetrahedral Cages, Journal of the American Chemical Society (2022). DOI: 10.1021 / jacs.2c00760
Presented by the Chinese Academy of Science
Directions: Researchers found the visitor -led meeting and chiral installation of photofunctional lanthanide tetrahedral cages (2022, April 1) retrieved on 2 April 2022 from https: // phys.org/news/2022-04-guest-driven-self-assembly- chiral-induction-photofunctional.html
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