On the origin of the so-called nucleation loop during electropolymerization of conducting polymers

Article Abstract:

Cyclic voltammograms of [pi]-systems with race crossing and loop effects that suggest that the homogeneous formation of oligomeric redoxactive follow-up products from the starting species is responsible for this occurrence are presented. The investigation of the species, which are typical starting components of resulting oligomers or polymers, helps in concluding that the findings are evidence that similar mechanisms also hold for the formation of many other classical polymers with a "nucleation loop" like polypyrrole.

Oligomers

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Dendritic aggregation of oligothiophene during desorption of 2,5-diiodothiophene multilayer and topography-induced alignment of oligothiophene nanofibers

Article Abstract:

The multilayer desorption behavior of 2,5-diidothiophene and the dendritic aggregation of photochemical reaction products during the desorption of 2,5-diiodothiophene multilayers is studied. Like many other aromatic compounds, 2,5-diiodothiophene shows a multilayer desorption behavior different from the typical zeroth-order kinetics, a metastable desorption peak growth at ~220 K followed by a thick multilayer peak growth at ~235 K.

Irradiation, Optical properties, X-ray spectroscopy, Chemical properties, Irradiation (Radiation exposure)

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Quantum chemical analysis of electronic structure and n- and p-type charge transport in perfluoroarene-modified oligothiophene semiconductors

Article Abstract:

Density-functional theory (DFT) is used to investigate the structural, electronic, and transport properties of several isomeric fluoroarene-oligothiophene-based semiconductors. It is found that analyses of computed orbital splitting trends and band structure elucidates charge-transport behavior in these unusual isomeric molecular crystals.

Industrial Organic Chemicals, Cyclic Crude and Intermediate Manufacturing, Aromatic Hydrocarbons, Usage, Electric properties, Density functionals, Density functional theory

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