MOTS EN ANGLAIS EN RAPPORT AVEC «CROWN ETHER»
crown ether
crown
ether
reaction
magnesium
uses
nomenclature
sodium
sigma
ethers
cyclic
chemical
compounds
that
consist
ring
containing
several
groups
most
common
oligomers
ethylene
oxide
what
dupont
molecule
hydrogen
carbon
each
atom
arranged
thermodynamics
lithium
benzyl
thermodynamic
stability
complex
observed
metal
coronand
salt
respectively
solid
chemistry
university
calgary
varying
size
varies
cavity
some
ions
better
others
example
good
questions
ochempal
whose
features
three
more
same
adjacent
always
separated
complexation
catalyst
dissolves
benzene
potassium
permanganate
forced
dissolve
order
molecular
crowns
interesting
thing
about
capture
positively
charged
like
ammonium
sphere
shown
10 LIVRES EN ANGLAIS EN RAPPORT AVEC «CROWN ETHER»
Découvrez l'usage de
crown ether dans la sélection bibliographique suivante. Des livres en rapport avec
crown ether et de courts extraits de ceux-ci pour replacer dans son contexte son utilisation littéraire.
1
Effect of addition of
crown ether on the micellar behavior ...
The micellar properties of cationic dodecyltrimethylammonium chloride (DTAC) in aqueous media in the presence of 15-crown-5ether (CR) have been investigated by conductivity measurements over the temperature range 288.15-308.15 K. The ...
Rajni Garg, R.D. Singh, 2011
Organic chemistry may now be performed with these inorganic ions by putting the
crown ether-cation complex into a non-aqueous hydrophobic solvent. A similar
mechanism of complex formation may be responsible for the way such metal ...
3
Enzymes in Nonaqueous Solvents: Methods and Protocols
This way of drying proteins is relatively fast compared to lyophilization. In order to
investigate the crown ether activation, 18-crown-6 has been added at three
different stages during this precipitation procedure: (1) addition to the aqueous
buffer ...
Evgeny N. Vulfson, Peter J. Halling, Herbert L. Holland, 2001
4
Competition Science Vision
The crown ethers are an interesting class of poly- ethers, the important
complexing agents, first synthe- sised by Pedersen in 1967. An example of crown
ether is dibenzo-18-crown-6. The name indicates that there are two benzene
rings in the ...
5
Phosphazenes: A Worldwide Insight
As can be seen in Figure 5, the addition of crown ether entities to the metal
solution cause in any case a continuous decrease of the molar conductance. This
indicates a lower mobility of the Na+ and K+ ion crown cavity complex compared
to ...
Mario Gleria, Roger De Jaeger, 2004
Crown ether statistically threaded the polymer chain to produce
pseudopolyrotaxane. It was postulated that hydrogen-bonding interaction
between the hydroxy group in tetra(ethylene glycol) or the NH group on the
urethane group with crown ...
7
Proceedings of the Symposium on Lithium Batteries
... W. K. Behl Army Research Laboratory 2800 Powder Mill Rd AdelphLMD 20783
-1197 ABSTRACT Pentamethyldiethylenetriamine (PMDT), tetra(ethylene glycol)
dimethyl ether (tetraglyme), and the crown ether 12-Crown-4 were investigated ...
Subbarao Surampudi, Richard A. Marsh, 1999
8
Separation Methods in Drug Synthesis and Purification
... primary alkylamines crown-ether (Crownpak CR) I34] Alicyclic B-amino acids:
cis and trans crown-ether (Crownpak CR) [35] 2-aminocyclohexane-1-carboxylic
acids and cis and trans 2-amino-4-cyclohexene-1-carboxylic acids 2-(2-Amino-l ...
9
The Porphyrin Handbook: Phthalocyanines: Properties and ...
In the absence of alkali metal ions, these crown ether phthalocyanines aggregate
in solution. While dimerization constants were not reported for the alkali metal
free association, its ranking of solvent dependence was observed (Table 10).
Karl Kadish, Roger Guilard, Kevin M. Smith, 2006
10
The Porphyrin Handbook: Multiporphyrins, ...
Karl M. Kadish, Kevin M. Smith, Roger Guilard. u — 1: Interaction Hydrogen
Bonding \! Left-handed Helix Figure 9. Structures of the first achiral crown ether
phthalocyanines. Figure B. Speculated pathways for the formation of fibrous ...
Karl M. Kadish, Kevin M. Smith, Roger Guilard, 2003
10 ACTUALITÉS CONTENANT LE TERME «CROWN ETHER»
Découvrez de quoi on parle dans les médias nationaux et internationaux et comment le terme
crown ether est employé dans le contexte des actualités suivantes.
At Pennsville's Chambers Works, Chemours debuts, word of future …
Teflon was invented there and a chemist, Salem's Charles Pedersen, who worked there and discovered the crown ether molecule, was ... «NJ.com, juil 15»
Molecular shuttle slides into the solid state
The shuttle is made up of a crown ether macrocycle and two benzimidazole sites, which act as the destinations. The researchers argue that this ... «Royal Society of Chemistry, mai 15»
Metal-organic framework with a fixed composition despite initial …
It is comprised of organic struts with the same backbone and but with side chains that are either a crown ether or a catenane. Both crown ether ... «Phys.Org, mai 15»
Unexpected success with luminescent liquid crystals
In this proof of concept, cationic complexes were formed between a crown ether and alkali cations (Cs+), which associate with an octahedral ... «Royal Society of Chemistry, févr 15»
Crown ethers flatten in graphene for strong, specific binding
Link them together in large molecular rings and they become scientific royalty—crown ether molecules, whose development led in large part to ... «Phys.Org, déc 14»
New DuPont Chambers Works plant manager ready to take on big …
... at Chambers Works – became the first DuPont employee company-wide ever to win a Nobel Prize for the discovery of crown ether molecules. «NJ.com, déc 14»
Lanthanides Topple Assumptions
A potassium atom donates an electron to the lanthanide(III) complex. The resulting K+ is sequestered by a crown ether, 18-crown-6, or similar ... «The Biological SCENE, juin 13»
Rice Strategy Turns Negatively Charged Carbon Nanotubes into …
Crown ether “cages” trap potassium ions but leave nanotubes with a repellant negative charge in solutions that will be valuable for forming very ... «AZoNano.com, mai 13»
'Going negative' pays for nanotubes: Team finds possible keys to …
Crown ether "cages" trap potassium ions but leave nanotubes with a repellant negative charge in solutions that will be valuable for forming very ... «Phys.Org, mai 13»
New compound reveals intriguing properties of uranium
The resultant sodium salt was treated with a crown ether, a chemical efficient at chelating cations such as sodium, to free the anionic product in ... «Varsity, nov 12»
