Characterization of 12-tungstophosphoric acid and related salts using photoacoustic spectroscopy in the infrared region: I. Thermal stability and interactions with ammonia

The structure and thermal decomposition of unsupported and titania-supported 12-phosphoromolybdic acid (HPMo) and its Co and Ni salts have been studied by different techniques including X-ray diffraction, thermogravimetric analysis, FT-infrared, Raman, and X-ray spectroscopic techniques. The transformation of heteropoly anion of bulk HPMo begins at a temperature lower than for its TiO2-supported counterpart with the formation of a mixture of α- and β-MoO3. In the thermal transformation of TiO2-supported HPMo, two steps have been identified. The intermediate species formed between the hydrated form of the heteropoly compound and the crystallized molybdenum oxides display the same nuclearity and composition as that of the Keggin precursor. The stability of the HPA supported on titania increases due to the anion-support interaction and this is even enhanced in the Co- and Ni-exchanged homologues.

Structural Features and Thermal Stability of Titania-Supported 12-Molybdophosphoric Heteropoly Compounds

Barbituric and thiobarbituric acids: a conformational and spectroscopic study.

A convenient method for the preparation of barbituric and thiobarbituric acid transition metal complexes.

Polarographic reduction of aldehydes and ketones

Polarography of some sulphur-containing compounds. XVI. Polarographic and spectral investigation of acid-base equilibria in aqueous solutions of 2-thiobarbituric acids with substituents on sulphur.

Polarography of some sulphur-containing compounds: Part xv. polarographic and spectral investigation of acid-base equilibria in aqueous solutions of substituted 2-thiobarbiturates

Research topics in Analytical Chemistry: some current work in universities and colleges

Polarographie von schwefelhaltigen verbindungen 17. mitt. polarographische und spektroskopische untersuchung von saeure-base-gleichgewichten in waessrigen loesungen von amino- und imino-derivaten der 2-thio-barbitursaeure

W. F. Smyth

Papers

Polarography of some sulphur-containing compounds. XVI. Polarographic and spectral investigation of acid-base equilibria in aqueous solutions of 2-thiobarbituric acids with substituents on sulphur.

Polarography of some sulphur-containing compounds: Part xv. polarographic and spectral investigation of acid-base equilibria in aqueous solutions of substituted 2-thiobarbiturates

Research topics in Analytical Chemistry: some current work in universities and colleges

Polarographie von schwefelhaltigen verbindungen 17. mitt. polarographische und spektroskopische untersuchung von saeure-base-gleichgewichten in waessrigen loesungen von amino- und imino-derivaten der 2-thio-barbitursaeure