The properties of borderlines in discontinuous conservative systems

Wang, X.-M.; Fang, Zhengji

doi:10.1140/epjd/e2005-00309-0

Cited by 2 publications

(1 citation statement)

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“…However, studies on preparation and thermal properties of the complexes of ciprofloxacin with heteropoly acids are scarce. Recently, we 8,9 reported the synthesis, characterization and thermal behavior of the polyoxometalate complexes of ciprofloxacin with several heteropoly acids. As a continuation of our work, we now report the preparation, characterization, thermal decomposition behavior and non-isothermal kinetics of the polyoxometalate of ciprofloxacin with 12-tungstosilicic acid.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Thermal Decomposition Kinetics of Polyoxometalate of Ciprofloxacin with 12-Tungstosilicic Acid

Wang¹,

Fang

Wei

2005

Chin. J. Chem.

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40 •nH 2 O in aqueous solution, and characterized by elemental analysis, IR spectra and DTA-TG-DTG techniques. The IR spectrum confirmed the presence of Keggin structure and the characteristic functional group for ciprofloxacin in the compound. The TG-DTA-DTG curves showed that its thermal decomposition was a four-step process consisting of simultaneous collapse of Keggin type structure. The residue of decomposition was the mixture of WO 3 and SiO 2 , confirmed by X-ray diffraction and IR spectroscopy. The decomposition mechanism and nonisothermal kinetic parameters of the polyoxometalate were obtained from an analysis to the TG-DTG curves by the single scanning methods (the Achar method and Coats-Redfern method) and the multiple scanning methods (the Kissinger method, Flynn-Wall-Ozawa method and Starink method

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Section: Introductionmentioning

confidence: 99%