Host matrix dependent fluorescence intensity modulation by an electric field in single conjugated polymer chains

Article Abstract:

The effect of an electric field on the fluorescence intensity of poly[2-methoxy,5-(2'-ethyl-hexyloxy)-p-phenylene] (MEH-PPV) at the single-molecule level is investigated. The electric field dependence of single-molecule fluorescence has indicated that energy transfer from singlet or even triplet excitons to long-living on-chain hole polarons has contributed to the observed modulations.

Analysis, Electric properties, Fluorescence, Organic semiconductors, Optical properties, Structure

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Stochastic resonance to control diffusive motion in chemistry

Article Abstract:

A report on a novel procedure to tune the effective diffusion coefficient of a field-sensitive reactant in the presence of a periodic external field is presented. The motion of two negatively charged azo dyes interacting with alpha-cyclodextrin (alpha-CD) upon action of a periodic square wave electrical field is investigated.

Chemical research, Cyclodextrins

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Thermodynamic behavior of a supramolecular system self-assembled by electrostatic interaction in aqueous solution. Results and theoretical analysis

Article Abstract:

It has been possible to use potentiometry to assess the acid-base and association properties of oppositely charged cyclodextrins in aqueous solution. There is strong evidence that the electrostatic interaction can be used for rationally building noncovalent self-assembled oligomeric arrays in aqueous solution.

Electrostatics, Thermodynamics

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