On the determination of the diffusion coefficients of electrons and of potassium ions in copper(II) hexacyanoferrate(II) composite electrodes

Article Abstract:

Cyclic voltammetry and electrochemical impedance spectroscopy were used in determining the diffusion coefficients of electrons and potassium ions in graphite, paraffin and copper(II) hexacyanoferrate(II) (Cu hcf). These compounds show good potential as materials for new ion-selective electrodes. The redox reaction of lattice metal ions are accompanied by a reversible exhange of cations between the electrolyte solution and interstitial holes of the solid compound. Results show the diffusion coefficient is due to the semiconductor properties of Cu hcf. Separating cation diffusion from electron hopping has not been achieved.

Evaluation, Oxidation-reduction reaction, Oxidation-reduction reactions, Electronic structure, Atomic structure, Copper compounds, Electrodes, Ion selective, Ion selective electrodes

---

Quenching of excited triplet state hypericin with energy acceptors and donors and acceptors of electrons

Article Abstract:

A study was conducted to analyze the quenching of the triplet state of hypericin by acceptors of electronic energy and donors and acceptors of electrons. Nanosecond laser photolysis was utilized to carry out the analysis. Results indicated that the rate constant profiles for electron transfer were consistent with an excited-state reaction that occurs before electron transfer. Findings also showed that the rate constant of the interaction of minimized hypericin with O2 was about 3.8 x 10(super 8)M(super -1)s(super -1) in acetonitrile.

Research, Electrons, Excited state chemistry, Hypericin

---

Bringing electrons and microarray technology together

Article Abstract:

The consequences of low-energy electron impact on the DNA's ability to hybridize are analyzed. The secondary electron (SE) micrographs have shown that strand breaks induced by the electrons have plays a key role in the reaction mechanism.

DNA microarrays, Cell hybridization

Similar abstracts:

• Abstracts: Observation of pH-dependent back-electron-transfer dynamics in alizarin/TiO(sub 2) adsorbates: Importance of trap states
• Abstracts: Ultrasonic and densimetric characterizations of the hydration properties of polar groups in monosaccharides. Hydrophobic hydration in cyclodextrin complexation
• Abstracts: Heterogeneous kinetics of the dissociation of an inorganic salt, potassium carbonate, in an organic solvent, dimethylformamide
• Abstracts: On measurement of molecular and thermal diffusion coefficients in multicomponent mixtures. A new strategy for evaluating the self-diffusion coefficient in restricted diffusion: case of polydisperse emulsions with small mean radii
• Abstracts: Effect of salt concentration on the conductivity of PEO-based composite polymeric electrolytes. Structure of nanometric silica clusters in polymeric composite materials

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