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
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Fine-Tuning Macrocycle Cavity to Selectively Bind Guests in Water for Near-Infrared Photothermal Conversion
TL;DR: In this paper , a naphthalimide-based synthesis of the required organic macrocycles to bind the size-matched targeted guests without undesired macrocyclic byproducts is presented.
Journal ArticleDOI
Study of the host-guest interaction between: N, N ′-bis[4-(dimethylaminophenyl)methyl]butane-1,4-diamine and the cucuribit [n] urils (n = 6, 7)
TL;DR: In this article, the interaction between cucuribit[n]urils (Q[n]), where n = 6 or 7, and the guest N,N′-bis[4-(dimethylaminophenyl)methyl]butane-1,4-diamine (G) has been studied in aqueous solution by 1H NMR spectroscopy, EBS and Isothermal Titration Calorimetry (ITC).
Journal ArticleDOI
Formation and Rupture of a Supramolecular Nanocapsule Triggered on–off–on Supramolecular Switch for Zn2+
TL;DR: In this paper, a selective fluorescence probe that contains 2-pphenylimidazo[4,5-f][1,10]phenanthroline and a viologen unit linked by a flexible chain was synthesized and found to be able to select zinc ions with a clear fluorescence enhancement and a large stokes shift in aqueous solution.
Journal ArticleDOI
Selective Release of Doxorubicin from Cucurbit[8]uril Stabilized Gold Supra-Pyramid Host at pH of Small Intestine.
TL;DR: Gold supra-pyramid structures were obtained by the addition of acidic solution of cucurbit[8]uril (CB[8]) to an aqueous solution of citrate stabilized gold nanoparticles (AuNP) and the precipitation resulted in the precipitation of supra- pyramids from the solution just after 1 min of shaking.
Journal ArticleDOI
Organic additives induced coordination complexes of cucurbit[5]uril with strontium(II)
TL;DR: In this article, three coordination complexes based on the macrocyclic ligand cucurbit[5]uril (Q[5]) with formulas {[Sr(C30H30N20O10)H2O]Cl2}·11 H2O (1), {Sr[C30 H30N 20O10] Cl2]2(C6H5NO3)2(H 2O)4]Cl4]
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.