Positive charge carriers on isolated chains of MEH-PPV with broken conjugation: Optical absorption and mobility

Article Abstract:

The pulse radiolysis of oxygen-saturated dilute solutions of poly[2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylene vinylene]s in benzene showed charge-transfer from the solvent radical cation to the polymer, yielding positive charge carriers on the isolated chains. The introduction of conjugated breaks decreased the charge mobility strongly, which was attributed to the disruption of the pi conjugation and/or the conformational disorder caused by the flexibility of the chains at the sites of conjugation breaks.

Science & research, Petrochemical Manufacturing, Benzene, Research, Methods, Charge transfer, Chemical properties

---

The disperse charge-carrier kinetics in regioregular poly(3-hexythiophene)

Article Abstract:

The pulse-radiolysis time-resolved microwave conductivity (PR-TRMC) technique is applied to study the charge-carrier recombination in two different samples of regio-regular P3HT obtained from Merck and sigma-Aldrich. It is shown that the lifetime of the charge carriers was determined by the concentration of electron acceptors.

Spectra, Dispersion, Dispersion (Optics)

---

VIS/NIR absorption spectra of positively charged oligo(phenylenevinylene)s and comparison with time-dependent density functional theory calculations

Article Abstract:

A combined experimental and theoretical study of the optical properties of positively charged unsubstituted and dialkoxy-substituted phenylenevinylene (PV) oligomers in solution is presented. Cations of PV oligomers were produced by irradiation of a solution with high-energy electron pulses.

Usage, Near infrared spectroscopy, Optical properties, Density functionals, Density functional theory, Vinyl compounds, Phenyl compounds

Similar abstracts:

• Abstracts: Density functional theory study of transformations of nitrogen oxides catalyzed by Cu-exchanged zeolites. First-principles molecular dynamics simulations of H2O on alpha-Al2O3 (0001)
• Abstracts: Adsorption on carbon nanotubes studied using polarization-modulated infrared reflection-absorption spectroscopy
• Abstracts: Dative and Di- sigma bond binding states of pyridine on Si (100) and their thermal stability. Thermal chemistry of CH3 on Si/Cu(100); the role of Sn as a promoter
• Abstracts: Effect of chromium substitution on the local structure and insertion chemistry of spinel lithium manganates: investigation by x-ray absorption fine structure spectroscopy
• Abstracts: Dependence of copper species on the nature of the support for dispersed CuO catalysts. Experimental and modelization approach in the study of acid-site energy distribution by base desorption: Part I: Modified silica surfaces

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.