Reversal of interfacial dipole orientation in polyelectrolyte superlattices due to polycationic layers

Article Abstract:

A series of polycations are used with a common polyanion to form asymmetric polar ordered polyelectrolyte multilayered superlattices. A polycation outer layer reveal a change in chromophore orientation at the polycation/PAZO interfacial region that results in dipole reversal and leads to an attenuation of the SH signal when the polyelectrolyte film is terminated with a polycation.

Superlattices as materials, Superlattices

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Ion association and ion solvation effects at the crystalline-amorphous phase transition in PEO-LiTFSI

Article Abstract:

An extensive Raman spectroscopy study on the PEO-LiTFSI system as a function of composition and temperature is done. It is suggested that for all-amorphous P(EO)(sub n)LiTFSI electrolytes, lithium cations predominately are solvated by ether oxygen for n (greater than or equal to) 8, and by a combination of ether oxygens and TFSI anions for n=6.

Usage, Raman spectroscopy

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Local free volume and structure of polymer gel electrolytes on the basis of alternating copolymers

Article Abstract:

The relationship between the structure of the polymer and the charge carrier mobility and the ionic conductivity is studied for a class of gel electrolytes on the basis of alternating copolymers. The o-Ps lifetime is discussed in terms of o-Ps bubbles in the plasticizer-salt solution.

Copolymers

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