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The aqueous supramolecular chemistry of crown ethers [PDF]

open access: yesFrontiers in Chemistry, 2023
This mini-review summarizes the seminal exploration of aqueous supramolecular chemistry of crown ether macrocycles. In history, most research of crown ethers were focusing on their supramolecular chemistry in organic phase or in gas phase.
Zhenhui Qi   +8 more
doaj   +4 more sources

Entropy Effects in Intermolecular Associations of Crown-Ethers and Cyclodextrins with Amino Acids in Aqueous and in Non-Aqueous Media [PDF]

open access: yesEntropy, 2021
The analysis of the ratios of entropy and enthalpy characteristics and their contributions to the change in the Gibbs energy of intermolecular interactions of crown ethers and cyclodextrins with amino acids is carried out.
Tatyana Usacheva   +6 more
doaj   +2 more sources

Thermodynamic and electrochemical study of tailor-made crown ethers for redox-switchable (pseudo)rotaxanes [PDF]

open access: yesBeilstein Journal of Organic Chemistry, 2020
Crown ethers are common building blocks in supramolecular chemistry and are frequently applied as cation sensors or as subunits in synthetic molecular machines.
Henrik Hupatz   +10 more
doaj   +2 more sources

Synthesis, Biological Evaluation, and Molecular Modeling of Aza-Crown Ethers [PDF]

open access: yesMolecules, 2021
Synthetic and natural ionophores have been developed to catalyze ion transport and have been shown to exhibit a variety of biological effects. We synthesized 24 aza- and diaza-crown ethers containing adamantyl, adamantylalkyl, aminomethylbenzoyl, and ε ...
Stepan S. Basok   +9 more
doaj   +2 more sources

RETRACTED: Ullah et al. Fluorescent and Phosphorescent Nitrogen-Containing Heterocycles and Crown Ethers: Biological and Pharmaceutical Applications. Molecules 2022, 27, 6631 [PDF]

open access: yesMolecules
The journal retracts the article titled “Fluorescent and Phosphorescent Nitrogen-Containing Heterocycles and Crown Ethers: Biological and Pharmaceutical Applications” [...]
Faiz Ullah   +8 more
doaj   +2 more sources

Crown ethers in graphene [PDF]

open access: yesNature Communications, 2014
Crown ethers are at their most basic level rings constructed of oxygen atoms linked by two- or three-carbon chains. They have attracted attention for their ability to selectively incorporate various atoms or molecules within the cavity formed by the ring. However, crown ethers are typically highly flexible, frustrating efforts to rigidify them for many
Junjie, Guo   +7 more
openaire   +2 more sources

Electrochemical and Fluorescent Properties of Crown Ether Functionalized Graphene Quantum Dots for Potassium and Sodium Ions Detection

open access: yesNanomaterials, 2021
The concentration of sodium and potassium ions in biological fluids, such as blood, urine and sweat, is indicative of several basic body function conditions.
Daniela Iannazzo   +5 more
doaj   +1 more source

Carbohydrate-Based Azacrown Ethers in Asymmetric Syntheses

open access: yesChemistry, 2021
Carbohydrate-based crown ethers represent a special group of chiral phase transfer catalysts. Several derivatives of these macrocycles have been synthesized in our research group.
István Orbán, Péter Bakó, Zsolt Rapi
doaj   +1 more source

Conductometric study of ligand structure influence on the Pb(II) complexation with crown ethers [PDF]

open access: yesSTED Journal, 2020
The conductometric study of ligand structure influence on the Pb(II) complexation with crown ethers in different solvents has been investigated. In this paper, the complexation reaction of macrocyclic ligand, 18-crown-6 (18C6), dibenzo-18-crown-6 (DB18C6)
Edita Bjelić   +3 more
doaj   +1 more source

Natural products embedded crown ethers as potent insulin secretory agents

open access: yesPakistan Journal of Pharmaceutical Sciences, 2021
Natural products embedded crown ethers were prepared by utilizing bioactive natural products including chrysin, tetrahydroisoquinoline (THIQ), and biochanin-A.
Nuzhat Arshad   +9 more
doaj   +1 more source

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