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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Cucurbit [n] uril compounds and analogs, and methods of making and using the same
Lyle Isaacs,Jason Lagona +1 more
TL;DR: In this paper, a macrocycle wall of a cucurbit[n]uril compound is selected from the group consisting of CB[5], CB[6, CB[7] and CB[8] compounds, the compounds having an internal cavity which may be used to contain a guest compound.
Journal ArticleDOI
Symmetrical-Tetramethyl-Cucurbit[6]uril-Driven Movement of Cucurbit[7]uril Gives Rise to Heterowheel [4]Pseudorotaxanes.
TL;DR: In the construction process, due to strong repulsive forces between carbonyl portals of two neighboring wheels, the dethreading and movement of the wheels along the axle was observed and the dissociation of the [4]pseudorotaxanes was also discussed.
Journal ArticleDOI
Fluorescence visualization of cucurbit[8]uril-triggered dynamic host–guest assemblies
TL;DR: Characterization suggested that the Q[8] host-stabilized charge-transfer interactions could be dissociated and controlled by the N-substituted alkyl chains on the cationic guests via the formation of a 2 : 3 quinary complex or a U-shaped conformation, which led to the discovery of new possible binding modes for the Q(8) host.
Journal ArticleDOI
Kinked-Helix Actinide Polyrotaxanes from Weakly Bound Pseudorotaxane Linkers with Variable Conformations.
TL;DR: This work enriches the library of actinide-rotaxane compounds and provides a new approach to construct metal-organic compounds with complicated structures using weakly bonded pseudorotaxanes as well.
Journal ArticleDOI
Chemoresponsive polymer systems for selective molecular recognition of organic molecules in biological systems.
Monika Gosecka,Mateusz Gosecki +1 more
TL;DR: This review summarizes the state of the art in the self-assemblies of amphiphilic copolymers and polymer networks sensitive toward organic species and focuses on the relationship between the selectivity of introduced receptor moieties responsible for the change of material structure, the overall structure of material and its functionality.
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.
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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.