This study reports a method for enhancing the functions and properties of traditional organic macrocyclic hosts by fully encapsulating them within a large ML cage to form host-in-host complexes. Within the cage host, the macrocyclic organic hosts with electron-rich aromatic rings, such as cyclotriveratrylene and calix[8]arene, adopt specific orientations enhancing their inherent molecular recognition abilities. Due to the high crystallinity of the ML cage, the guest encapsulation behavior of the host-in-host complexes can be observed by X-ray structural analysis.
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http://dx.doi.org/10.1002/anie.202422143 | DOI Listing |
Angew Chem Int Ed Engl
December 2024
Tokyo Colledge, UT Institutes for Advanced Study, The University of Tokyo, Mitsui Link Lab Kashiwanoha 1, FS CREATION, 6-6-2 Kashiwanoha, Kashiwa, Chiba 277-0882, Japan.
Angew Chem Int Ed Engl
June 2021
Institut Lavoisier de Versailles, CNRS, UVSQ, Université Paris-Saclay, Versailles, France.
Herein, we show how the chaotropic effect arising from reduced molybdate ions in acidified aqueous solution is able to amplify drastically weak supramolecular interactions. Time-resolved Small Angle X-ray Scattering (SAXS) analysis suggests that molybdenum-blue oligomeric species form huge aggregates in the presence of γ-cyclodextrin (γ-CD) which results in the fast formation of nanoscopic {Mo }-based host-guest species, while X-ray diffraction analysis reveals that the ending-point of the scenario results in an unprecedented three-component well-ordered core-shell-like motif. A similar arrangement was found by using preformed hexarhenium chalcogenide-type cluster [Re Te (CN) ] as exogenous guest.
View Article and Find Full Text PDFJ Org Chem
December 2012
Departamento Quimica Fisica, Centro Singular de Investigación en Química Biológica y Materiales Moleculares, Universidad de Santiago, 15782 Santiago, Spain.
The interaction between γ-cyclodextrin and amphiphilic p-sulfonatocalix[4]arenes was studied using NMR and isothermal titration calorimetry techniques. The results indicate that these calixarenes are able to form 1:1, 1:2, and 2:1 host-guest complexes with the cyclodextrin. The ROESY spectra suggest that the cyclodextrin binds the calixarenes through the hydrophobic alkyl chains.
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