Conformation of polyelectrolyte chains in dilute aqueous solutions investigated by conductometry. 4. Influence of molecular mass and charge density of the chains on conformation of symmetrical aliphatic ionene bromides

Article Abstract:

The approach based on conductivity measurements, which provides valuable information on the conformation of polyions in salt-free dilute aqueous solutions that correlates well with data obtained by other methods is discussed. The results shows that both symmetrical and nonsymmetrical ionenes are valuable polycations to reveal the effect of mean charge density and the charge distribution of the chains on their properties.

Observations, Aqueous solution reactions

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Structure and dynamics of [Br.sup.-] ion in liquid methanol

Article Abstract:

The structural and dynamical properties of the bromide ion in methanol are analyzed with Car-Parrinello molecular dynamics (CPMD) and are compared with those of [Cl.sup.-]. The differences in the coordination number with the chloride is attributed to the ionic radius and to the stronger perturbations brought by the solvent to the bromide ion.

Analysis, Neutrons, Molecular dynamics, Solvation, Neutron scattering, Structure

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Cluster ion formation in electrosprays of acetonitrile seeded with ionic liquids

Article Abstract:

Clusters formed in positive electrospryas of several room-temperature molten slats A+B- dissolved in acetonitrile are examined in their natural charge state by high-resolution differential mobility analysis. The new ability to distinguish ions formed by either scheme provides information on the ranges of cluster size that may ion evaporate.

All Other Basic Organic Chemical Manufacturing, Industrial Organic Chemicals, Acetonitrile, Magnetic properties, Cluster analysis

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