Results 191 to 200 of about 26,663 (244)
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Ion pair receptors based on anion–π interaction
Chemical Communications, 2011A novel type of ditopic ion pair receptors based on anion-π interaction is reported. Oxacalix[2]arene[2]triazine azacrowns were synthesized efficiently from a one-pot reaction between 2,4-dichloro-4-methoxytriazine and 3,5-dihydroxybenzaldehyde followed by condensation with a diamine and reduction of bisimine; they acted as selective ditopic receptors ...
Yin, Chen +3 more
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Physical Chemistry Chemical Physics, 2015
Weak non-covalent interactions were studied by means of QTAIM and NCI approaches in ion pairs and ion pair dimers of 1-alkyl-3-methylimidazolium cations coupled with perfluorinated anions.
Marekha, B., Kalugin, O.N., Idrissi, A.
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Weak non-covalent interactions were studied by means of QTAIM and NCI approaches in ion pairs and ion pair dimers of 1-alkyl-3-methylimidazolium cations coupled with perfluorinated anions.
Marekha, B., Kalugin, O.N., Idrissi, A.
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The Journal of Organic Chemistry, 2007
It is demonstrated that our reported equilibrium treatments that take into account ion-paired guest and non-ion-paired complexes can be applied to competitive complexations. Satisfactory results were obtained for a system with two cationic guests [N,N'-dimethyl-4,4'-biyridinium bis(hexafluorophosphate) (1) and dibenzylammonium hexafluorophosphate (2 ...
Feihe, Huang +2 more
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It is demonstrated that our reported equilibrium treatments that take into account ion-paired guest and non-ion-paired complexes can be applied to competitive complexations. Satisfactory results were obtained for a system with two cationic guests [N,N'-dimethyl-4,4'-biyridinium bis(hexafluorophosphate) (1) and dibenzylammonium hexafluorophosphate (2 ...
Feihe, Huang +2 more
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Ion-Pair Interactions of Lanthanide(III) Complexes in Aqueous Solutions
Inorganic Chemistry, 2000The formation of ion-pair adducts between the cationic complex La(THP)3+ (THP = 1,4,7,10-tetrakis(2-hydroxypropyl)-1,4,7,10-tetraazacyclododecane) and the anionic complexes Tm(DOTA)- (DOTA = 1,4,7,10-tetraazacyclododecane-N,N',N",N"'-tetraacetate), Tm(DTPA)2- (DTPA = diethylenetriamine-N,N,N',N",N"-pentaacetate), Tm(TTHA)3- (TTHA ...
D M, Corsi, H, van Bekkum, J A, Peters
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Dependence of the Rate of LiF Ion-Pairing on the Description of Molecular Interaction
The Journal of Physical Chemistry B, 2015We present an analysis of the dynamics of ion-pairing of lithium fluoride (LiF) in aqueous solvent using both detailed molecular simulation as well as reduced models within a generalized Langevin equation (GLE) framework. We explored the sensitivity of the ion-pairing phenomena to the details of descriptions of molecular interaction, comparing two ...
Eva, Pluhařová +4 more
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Role of ion-pair interactions on asphaltene stabilization by alkylbenzenesulfonic acids
Journal of Colloid and Interface Science, 2015The dispersion of asphaltenes by dodecylbenzenesulfonic acid (DBSA) has been the subject of several studies in the past. However, it is unclear how these interactions affect the structure of asphaltenes and why asphaltene aggregates are larger in the presence of ionic DBSA.
Lamia, Goual, Mohammad, Sedghi
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Interactions of Ions and Ion Pairs with Crown Ethers and Their Polymers
Journal of Macromolecular Science: Part A - Chemistry, 1973Abstract The interactions of ions and ion pairs with crown ethers (macrocyclic polyethers) and their vinyl polymers were studied in aqueous and non aqueous media by using optical spectroscopy, distribution equilibria, conductance, and viscosity. The polymers, poly(vinylbenzo-15-crown-5) and poly(vinylbenzo-18-crown-6), were found to be considerably ...
S. Kopolow +3 more
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The spin-phonon interaction of Ni2+ ion pairs in KMgF3
Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences, 1970Abstract Unexpected lines in the acoustic paramagnetic resonance spectrum of KMgF3:Ni2+ are assigned to second nearest neighbour and more distant Ni2+ ion pairs. Exchange parameters are deduced for the pairs, and the mechanism for their spin-phonon interaction is inferred to be the single-ion, (S1. d. S1) + (S2- d. S2) process.
D. K. Garrod +2 more
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Nonadiabatic electronic interactions in the ion-pair states of NeICl
The Journal of Chemical Physics, 1991Nonadiabatic interactions in the NeICl van der Waals complex have been explored in the lowest energy triad of ICl ion-pair states (∼39 000 cm−1). Dispersed fluorescence measurements reveal emission characteristic of multiple ion-pair electronic states, with the relative contributions from the E(0+), β(1), and D′(2) states changing with the initial ICl ...
Stephenson, Thomas Alex +2 more
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Measurement of Ion-Pairing Interactions in Buffer Solutions With Microwave Microfluidics
IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology, 2019Microwave microfluidic spectroscopy is an emerging technique for quantifying the frequency-dependent electrical response of fluids. This technique can access important physical properties, including ion mobility and hydration, which are directly applicable to biochemistry. One critical step toward quantifying these effects is to develop accurate models
Nathan D Orloff +2 more
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