scholarly journals Symmetry loss of heptamethine cyanines: an example of dipole generation by ion-pairing effect

2013 ◽  
Author(s):  
Simon Pascal ◽  
Pierre-Antoine Bouit ◽  
Boris Le Guennic ◽  
Stéphane Parola ◽  
Olivier Maury ◽  
...  
Keyword(s):  
Ion Pairing ◽  
Pairing Effect

scholarly journals The observation of ion-pairing effect based on substituent effect of ferrocene derivatives

2015 ◽  
Vol 757 ◽  
pp. 258-262 ◽  
Author(s):  
Yujie Shi ◽  
Liu Fang ◽  
Xuan Li ◽  
Liangti Qu ◽  
Huibo Shao
Keyword(s):  
Substituent Effect ◽  
Ion Pairing ◽  
Ferrocene Derivatives ◽  
Pairing Effect

scholarly journals Continuous Symmetry Breaking Induced by Ion Pairing Effect in Heptamethine Cyanine Dyes: Beyond the Cyanine Limit

2010 ◽  
Vol 132 (12) ◽  
pp. 4328-4335 ◽  
Author(s):  
Pierre-Antoine Bouit ◽  
Christophe Aronica ◽  
Loïc Toupet ◽  
Boris Le Guennic ◽  
Chantal Andraud ◽  
...  
Keyword(s):  
Symmetry Breaking ◽  
Ion Pairing ◽  
Cyanine Dyes ◽  
Continuous Symmetry ◽  
Pairing Effect

Modeling of ion-pairing effect in peptide reversed-phase chromatography

2012 ◽  
Vol 1249 ◽  
pp. 92-102 ◽  
Author(s):  
David Gétaz ◽  
Subrahmaniam B. Hariharan ◽  
Alessandro Butté ◽  
Massimo Morbidelli
Keyword(s):  
Ion Pairing ◽  
Reversed Phase ◽  
Reversed Phase Chromatography ◽  
Pairing Effect

Ion Pairing and Dielectric Decrement in Glycosaminoglycan Brushes

2020 ◽  
Author(s):  
James Sterling ◽  
Wenjuan Jiang ◽  
Wesley M. Botello-Smith ◽  
Yun L. Luo
Keyword(s):  
Molecular Dynamics ◽  
Ion Pairs ◽  
Mean Field ◽  
Salt Bridge ◽  
Ion Pairing ◽  
Donnan Potential ◽  
Mean Field Models ◽  
Ion Exclusion ◽  
Dynamics Simulations ◽  
Contact Ion Pairs

Molecular dynamics simulations of hyaluronic acid and heparin brushes are presented that show important effects of ion-pairing, water dielectric decrease, and co-ion exclusion. Results show equilibria with electroneutrality attained through screening and pairing of brush anionic charges by cations. Most surprising is the reversal of the Donnan potential that would be expected based on electrostatic Boltzmann partitioning alone. Water dielectric decrement within the brush domain is also associated with Born hydration-driven cation exclusion from the brush. We observe that the primary partition energy attracting cations to attain brush electroneutrality is the ion-pairing or salt-bridge energy associated with cation-sulfate and cation-carboxylate solvent-separated and contact ion pairs. Potassium and sodium pairing to glycosaminoglycan carboxylates and sulfates consistently show similar abundance of contact-pairing and solvent-separated pairing. In these crowded macromolecular brushes, ion-pairing, Born-hydration, and electrostatic potential energies all contribute to attain electroneutrality and should therefore contribute in mean-field models to accurately represent brush electrostatics.

Photoisomerization-induced patterning of ion-pairing materials based on anionic azobenzene and its complex with a fluorescent π-electronic system

2021 ◽  
Vol 57 (35) ◽  
pp. 4287-4290
Author(s):  
Ryohei Yamakado ◽  
Issei Kitamura ◽  
Mitsuo Hara ◽  
Shusaku Nagano ◽  
Takahiro Seki ◽  
...  
Keyword(s):  
Surface Tension ◽  
Mass Transport ◽  
Trace Amount ◽  
Ion Pairs ◽  
Ion Pairing ◽  
Electronic System ◽  
Large Mass ◽  
System P ◽  
The Difference

Large mass transport driven by the difference in the photoisomerization-induced surface tension was demonstrated in ion pairs, enabling fluorescence patterning using a trace amount of photoisomerized anions in complexation with a π-electronic system.

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