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[n]uril Host‐Guest Complexes of Acids, Photoacids, and Super Photoacids
TL;DR: In this paper, the supramolecular chemistry of host-guest complexes of cucurbit[n]urils (CB[n]) with acidic guests in the ground (HG+) and excited states(HG+*) are reviewed.
Journal ArticleDOI
Microwave synthesis of cucurbit[n]urils.
TL;DR: Microwave synthesis provides an efficient and cost-effective method for the large-scale production of CB[n] for a range of applications, particularly drug delivery.
Journal ArticleDOI
An Unprecedented Two-Fold Nested Super-Polyrotaxane: Sulfate-Directed Hierarchical Polythreading Assembly of Uranyl Polyrotaxane Moieties.
Lei Mei,Qun-Yan Wu,Li-Yong Yuan,Lin Wang,Shu-wen An,Zhen-ni Xie,Kong-qiu Hu,Zhifang Chai,Zhifang Chai,Peter C. Burns,Wei-Qun Shi +10 more
TL;DR: Detailed analysis of the coordination features, the thermal stability as well as a fluorescence, and electrochemical characterization demonstrate that the uniqueness of this super-polyrotaxane structure is mainly closely related to the trinuclear uranyl moiety, which is confirmed by quantum chemical calculations.
Journal ArticleDOI
Cucurbituril as a new “host” of organic molecules in inclusion complexes
TL;DR: In this article, a review of the latest data concerning the study of inclusion complexes based on cucurbiturils as a new class of molecular hosts is presented, with a discussion of the principles of construction of supramolecular complexes.
Journal ArticleDOI
Oligopeptide-CB[8] complexation with switchable binding pathways.
TL;DR: Host-guest complexes exhibiting a 1 : 1 binding stoichiometry need not consist of a single host and guest and can be utilised to 'customise' the precise CB[8]-oligopeptide self-assembly pathway, acting as a useful toolbox in the design of supramolecular systems.
References
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Journal ArticleDOI
I. Ueber Condensationsproducte aus Glycoluril und Formaldehyd
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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.