Journal ArticleDOI
Controlling factors in the synthesis of cucurbituril and its homologues.
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TLDR
A wide range of reaction conditions are examined that include the effects of acid type, acid concentration, reactant concentrations, and temperature to both probe the mechanism and optimize the yields of isolated cucurbit[n]urils, where n = 5-10.Abstract:
The acid-catalyzed synthesis of cucurbit[n]urils from formaldehyde and glycoluril is poorly understood. In this paper, we examine a wide range of reaction conditions that include the effects of acid type, acid concentration, reactant concentrations, and temperature to both probe the mechanism and optimize the yields of isolated cucurbit[n]urils, where n = 5−10. A mechanism for the formation of these cucurbit[n]urils is presented. Individual cucurbit[n]urils were unambiguously identified in reaction mixtures using ESMS and 13C NMR.read more
Citations
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Journal ArticleDOI
Cucurbit[7]uril complexes of crown-ether derived styryl and (bis)styryl dyes.
Olga A. Fedorova,Ekaterina Y. Chernikova,Yuri V. Fedorov,Elena N. Gulakova,Aleksander S. Peregudov,Konstantin A. Lyssenko,Gediminas Jonusauskas,Lyle Isaacs +7 more
TL;DR: It is found that the metal ions prefer to bind to the electrostatically negative ureidyl C=O portals of the CB[7] rather than with the crown ether moiety of the styryl dyes.
Journal ArticleDOI
Use of the macrocyclic ligand cucurbit[6]uril for isolation of tetranuclear lanthanide aquahydroxo-carboxylate complexes from aqueous solutions
E. A. Mainicheva,Olga A. Gerasko,Liliya A. Sheludyakova,D. Yu. Naumov,I. I. Karsanova,Rustem Amirov,Vladimir P. Fedin +6 more
TL;DR: The tetradentate coordination of the macrocyclic cucurbit[6]uril ligands through the portals leads to the formation of sandwich compounds, in which the tetranuclear hydroxo complex is located between two microcyclic molecules as discussed by the authors.
Journal ArticleDOI
Formation of Cucurbit[8]uril-Based Supramolecular Hydrogel Beads Using Droplet-Based Microfluidics.
TL;DR: The use of microdroplets as templates for the fabrication of uniform-sized supramolecular hydrogel beads, assembled by supramolescular cross-linking of functional biopolymers with the macrocyclic host molecule, cucurbit[8]uril (CB[8]).
Journal ArticleDOI
Encapsulation of the Ethylene Inhibitor 1-Methylcyclopropene by Cucurbit[6]uril
TL;DR: C cucurbit[6]uril (CB[6]) was used as the absorbent to encapsulate 1-MCP, and the resultant inclusion complex was characterized by IR, powder X-ray diffraction, thermal analysis, and fluorescent spectra.
Journal ArticleDOI
Determination of the kinetics underlying the pKa shift for the 2-aminoanthracenium cation binding with cucurbit[7]uril
Suma S. Thomas,Cornelia Bohne +1 more
TL;DR: The studies at various pH values showed different mechanisms for the formation of the AH(+)@CB[7] complex, with this complex formed either by the binding of AH(+) or by the initial binding of A followed by protonation.
References
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Journal ArticleDOI
I. Ueber Condensationsproducte aus Glycoluril und Formaldehyd
Journal ArticleDOI
An efficient, enantioselective synthesis of the taxol side chain
TL;DR: Synthese de la chaine du taxol a partir du phenylacetylene avec comme etapes-cle une epoxydation asymetrique et la scission regioselective de l'epoxyde as mentioned in this paper.
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A Molecular Bowl with Metal Ion as Bottom: Reversible Inclusion of Organic Molecules in Cesium Ion Complexed Cucurbituril
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Cucurbituril as a ligand for the complexation of cations in aqueous solutions
TL;DR: The complex formation of the ligand cucurbituril with alkaline cations and other cations have been studied by means of solubility measurements in the presence of the salts in aqueous solutions at 25 °C.
Journal ArticleDOI
Host–guest complexes of cucurbituril with the 4-methylbenzylammonium lon, alkali-metal cations and NH4+
TL;DR: In this article, the existence of two different complexes of cucurbituril with 4-methylbenzylammonium ions was reported. But the 1 : 1 stability constants were not reported for the 2 : 1 complexes with different cations.