Dynamic molecular oxygen accessibility to a buried Mn(super 2+) protein site: a high-field EPR experiment
Article Abstract:
A high-field (W-band, 3.35 T, 95 GHz) electron paramagnetic resonance (EPR) experiment to measure dynamic molecular oxygen accessibility to manganese(II) ions in liquids is described. The effect of O2 on continuous-wave (CW) EPR spectra from aqueous Mn(super 2+) complexes can be described, as an additional Lorentzian broadening whose magnitude is independent of the frequency of the EPR experiment but changes with the oxygen permeability coefficient of the solvent as per experiments.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2003
User Contributions:
Comment about this article or add new information about this topic:
Pressure dependence of Mn(super 2+) luminescence in differently sized ZnS:Mn nanoparticles
Article Abstract:
The pressure dependence of Mn(super 2+) emission in the 10-, 4.5-, 3.5-, 3-, and 1-nm-sized ZnS:Mn(super 2+) nanoparticles is investigated where the emission shifts to lower energies with increasing pressure, and the shift rate is larger in the ZnS:Mn(super 2+) nanoparticles than in bulk. These new observations are helpful for understanding the luminescence mechanisms in doped nanoparticles.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2003
User Contributions:
Comment about this article or add new information about this topic:
Formation and distinctive decay times of surface- and lattice-bound Mn(super 2+) impurity luminescence in ZnS nanoparticles
Article Abstract:
A study is conducted to distinguish the Mn(super 2+) impurity luminescence of Mn(super 2+) doped ZnS nanoparticles from ZnS host emission decay by measuring transient absorption and emission kinetic profiles in the picosecond-milisecond time domain is. The findings indicate that the energy transfer from ZnS host to Mn(super 2+) impurity takes place in a time interval of 700 ps.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2001
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Solvent clustering around pyrazine ions in the high-compressibility region of supercritical ethane. Reactions of charged species in supercritical xenon as studied by pulse radiolysis
- Abstracts: Worn model for electron tunneling in proteins: consolidation of the pathway model and the Dutton plot
- Abstracts: Ab initio calculations on a critical part of a protein, with an H5O2 partially charged group in a central role
- Abstracts: Nonlinear dynamics of the peroxidase-oxidase reaction. II. Compatibility of an extended model with previously reported model-data correspondences
- Abstracts: The fat torus scenario. Nonlinear dynamics of the peroxidase-oxidase reaction: I. Bistability and bursting oscillations at low enzyme concentrations