counterion


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counterion

[′kau̇nt·ər‚ī‚än]
(physical chemistry)
In a solution, an ion with a charge opposite to that of another ion included in the ionic makeup of the solution.
References in periodicals archive ?
The origin of the [alpha]-relaxation is a matter of controversy; most commonly, it is assumed to arise from counterion diffusion effects.
Simulation results indicate that as the solution concentration increases the density peaks of both the counterion and coion also increase, though not linearly.
Birge and his group found that the perchlorate counterion prefers to sit in one of two locations near the chain (see diagrams).
This proved that sulfonated poly(styrene) has high affinity for nickel, and with other metals being in order Ni2+greater than Zn2+greater than Cu2greater than Ca2 and that affinity is dependent upon the solution of pH and counterion.
41-42) The second avenue investigated was the modification of PPy properties by incorporation of dopant counterion on its backbone.
hypothesized that much of the observed relaxation behavior of proteins is due to movement of these nearly free protons in the applied field or the polarization of counterion sheaths around molecules (233).
The single long chain cationic surfactant is a quatemized amido-amine surfactant and preferably has a methylsulphate counterion.
25 g/L by weight, but polypeptide concentrations were corrected for counterion concentrations.
This has led to an important new concept in solid state chemistry, that of the ionic chiral auxiliary, whereby the enantioselectivity of a chemical reaction of an organic ion (for example, a carboxylate anion) in the crystalline state can be controlled by the presence of an optically active counterion (e.
This counterion is one important constituent in redox-based polythiophene memories, because it can support the polymer oxidation and reduction processes and simultaneously stabilize the charged form of the polymer.