X-ray absorption spectroscopic study of chemically and electrochemically Li ion extracted LiyCo0.85Al0.15O2 compounds
Article Abstract:
A Co K-edge X-ray absorption spectroscopy near-edge structure study of chemically and electrochemically Li ion extracted LiyCo0.85Al0.15O2 compounds revealed that the extraction results to an increase in the average oxidation state of the Co ion and the local structural distortion around the Co atom. The Li ion insertion/extraction processes were found to be reversible for three cycles. A Co K-edge X-ray absorption spectroscopy fine structure examination revealed that chemical and electrochemical extractions resulted to a decrease of the interatomic distance for each bond pair.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1999
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The complexation of tetracycline and anhydrotetracycline with Mg2+ and Ca2+: a spectroscopic study
Article Abstract:
A study was conducted to analyze the complexation of tetracycline and anhydrotetracycline supporting Mg2+ and Ca2+ ions, respectively. Steady-state absorption and emission, circular dichroism and time-of-flight secondary-ion-mass spectroscopy measurements were performed to carry out the analysis. Results indicated differences in the interaction effects for the two compounds. Findings also showed that the chelation behaviors of tetracycline and anhydrotetracycline correlated with the size of the ions.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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Non-Bornian theory of the Gibbs energy of ion transfer between two immiscible liquids
Article Abstract:
A novel non-Bornian theory is proposed for the Gibbs free energy (delta-G(sub tr)(super o, O -> W))of ion transfer at the organic solvent (O)/water interface. The theory involves the ionic charge (z)-dependent term of delta-G(sub tr)(super o, O -> W) which is treated as describing the specific interactions. Results demonstrate that the proposed theory is useful for the prediction of the delta-G(sub tr)(super o, O -> W) for some hydrophilic ions.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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