Vibronic behavior and single-crystal EPR spectra of Cu(II) in copper-doped diaqua(L-aspartato)zinc(II) hydrate

Article Abstract:

The vibrational and electron paramagnetic resonance spectra of copper ions that substitute zinc ions in diaqua(L-aspartato)zinc(II) hydrate or Zn(L-asp) were investigated. Results suggested that the Zn(L-asp) complex has a terragonally elongated octahedral structure with an othorhombic distortion. A comparison between the crystal structures of Zn(L-asp) and Cu(L-asp) indicated that they adopt a structure similar to that of the pure complex when Cu-(II) ions replace the Zn ions in diluted samples.

Research, Molecular structure, Copper compounds, Hydrates, Complex compounds, Zinc compounds, Vibrational spectra, Coordination compounds

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Thermal conductivity of methane hydrate from experiment and molecular simulation

Article Abstract:

Single-sided transient plane source method is used for determining the thermal conductivity and thermal diffusivity of compacted methane hydrate sample at various temperatures and pressures. The simulation thermal conductivity results have helped in predicting gas hydrate stability in sediments for producing/estimating methane release into the environment due to gradual warming.

Observations, Simulation methods, Simulation, Thermal properties, Thermal diffusivity, Heat, Heat conduction

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Stabilization of methane hydrate by pressurization with He or [N.sub.2] gas

Article Abstract:

The behavior of methane hydrate under the pressurization of helium or nitrogen gas demonstrated on the bases of results obtained from examining the effectiveness of gas pressurization for hydrate sample preservation.

Diffusion, Diffusion (Physics), Dissociation, Dissociation reactions, Structure, Chemical properties

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