Results 31 to 40 of about 300,802 (279)

Crown-Ether-Functionalized Mn(III) Salicylaldimine Complexes as Ditopic Carriers. Efficient Transport of Tryptophan and Serotonin across a CHCl3 Barrier

open access: yes, 2016
Crown-Ether-Functionalized Mn(III) Salicylaldimine Complexes as Ditopic Carriers.
D. Coucouvanis (2971878)   +2 more
core   +1 more source

Crystal structure of cis-anti-cis-dicyclohexane-18-crown-6 acetonitrile disolvate

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2015
The title compound (systematic name: cis-anti-cis-2,5,8,15,18,21-hexaoxatricyclo[20.4.0.09,14]hexacosane acetonitrile disolvate), C20H36O6·2CH3CN, crystallizes from an acetonitrile solution of dicyclohexane-18-crown-6 on evaporation.
Alexander Nazarenko
doaj   +1 more source

Synthesis and Coordination Chemistry of Ligands for Supramolecular Chemistry and Sensing Applications [PDF]

open access: yes
A series of multidentate N-donor ligands have been synthesised all containing pyridyl and pyridyl/thiazole units and their coordination behaviour is described.
Clayton, Hayley J.
core   +4 more sources

Luminescent Lariat Aza-Crown Ether

open access: yesMolbank, 2010
Lariat ethers are interesting recognition motifs in supramolecular chemistry. The synthesis of a luminescent lariat ether with triglycol chain by azide–alkyne (Huisgen) cycloaddition is presented.
Burkhard König   +2 more
doaj   +1 more source

Bis-15-crown-5-ether-pillar[5]arene K+‑Responsive Channels

open access: yes, 2017
An artificial selective K+ channel is formed from the supramolecular organization on bis­(benzo-15-crown-5- ether-ureido)-pillar[5]­arene compound. This channel achieves a selectivity of SK+/Na+ = 5 for an initial transport rate of kK+ = 3.2 × 10–3 s–1 ...
Mihail Barboiu (1438852)   +6 more
core   +1 more source

AB INITIO INVESTIGATION OF 12-CROWN-4 AND BENZO-12-CROWN-4 COMPLEXES WITH Li+, Na+, K+, Zn2+, Cd2+, AND Hg2+

open access: yesIndonesian Journal of Chemistry, 2010
The structure and binding energies of 12-crown-4 and benzo-12-crown-4 complexes with Li+, Na+, K+, Zn2+, Cd2+, and Hg2+were investigated with ab initio calculations using Hartree-Fock approximation and second-order perturbation theory. The basis set used
Yahmin Yahmin   +2 more
doaj   +1 more source

Vapor-Phase Oxidant-Free Dehydrogenation of 2,3- and 1,4-Butanediol over Cu/SiO2 Catalyst Prepared by Crown-Ether-Assisted Impregnation

open access: yesChemistry, 2023
A silica-supported copper (Cu/SiO2) catalyst containing highly dispersed Cu nanoparticles was prepared via a crown-ether-assisted impregnation method.
Enggah Kurniawan   +4 more
doaj   +1 more source

Light‐Enhanced Chloride Transport by Thiourea‐Appended Molecular Motor

open access: yesAngewandte Chemie, EarlyView.
A molecular motor functionalized with a thiourea anion‐binding motif mediates transmembrane chloride transport. Light irradiation enhances transport efficiency by populating a more active metastable isomer, which slowly equilibrates to the initial stable isomer.
Abhishek Mondal, Sander J. Wezenberg
wiley   +2 more sources

MODIFICATION OF CARBON PASTE ELECTRODE WITH CROWN ETHER (DIBENZO-18-CROWN-6) FOR ASCORBIC ACID ANALYSIS USING DIFFERENTIAL PULSE VOLTAMMETRY METHOD

open access: yesAlchemy, 2015
In this research, the modified carbon paste electrode with crown ether (dibenzo-18-crown-6) has been prepared, for determination of ascorbic acid. Some of parameters observed were optimization of crown ether composition in carbon paste, pH of solution ...
Manuntun Manurung, Anisha Maulinasari
doaj   +1 more source

Deprotonation and Alkylation of Weakly Acidic C(sp3)─H Bonds Through In Situ Generation of a Strong Hydride Base From 1,1,3,3‐Tetramethyldisiloxane and Potassium tert‐Butoxide

open access: yesAngewandte Chemie, EarlyView.
The use of 1,1,3,3‐tetramethyldisiloxane (TMDSO) and potassium tert‐butoxide enables direct alkylation of weakly acidic carbon–hydrogen bonds with alkyl halides. Experimental and computational studies support the formation of a substrate‐associated hydride‐like base, providing a single‐step alternative to the classical deprotonation and electrophile ...
Piers St. Onge   +4 more
wiley   +2 more sources

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