Mechanism for visible light responses in anodic photocurrents at N-doped TiO2 film electrodes

Article Abstract:

A definite mechanism for the visible-light responses in water photooxidation (oxygen photoevolution) on N-doped TiO2, as revealed by photocurrent measurements with film electrodes is reported. It is observed that photocatalytic oxidation of organic compounds on N-doped TiO2 under visible illumination mainly proceed via reactions with surface intermediates of water oxidation of oxygen reduction in combination with the above mechanism.

Observations, Oxidation-reduction reaction, Oxidation-reduction reactions, Optical properties, Titanium compounds, Mechanical properties

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Aggregation of spin labeled trichogin GA IV dimers: distance distribution between spin labels in frozen solutions by PELDOR data

Article Abstract:

Pulsed electron-electron double-resonance (PELDOR) and CW-ESR spectroscopies are applied to study the dipole-dipole interaction of spin labels in frozen glassy solutions of mono- and double-labeled analogues of the 22-residue, the head-to-tail covalent dimer of the peptaibol antibiotic trichogin GA IV. It is reported that no aggregation is detected in the MeOH solution.

Evaluation, Electron-electron interactions

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Structural consequences of spin conversion in a sterically encumbered Ni(II) porphyrin

Article Abstract:

The comparison of crystal structure of pyridine-ligated high-spin Ni(II) porphyrin complex with unligated low-spin Ni(II) complex is presented. Results indicate the induction of a Ni core expansion caused by conversion to high-spin Ni(II) in nonplanar sterically encumbered porphyrins.

Porphyrins, Crystallization

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