Preparation and Thermal Decomposition of the Polyoxometalate Complexes of Ciprofloxacin with H_nXW₁₂O₄₀ (X=B, Si, P)

Abstract:

The polyoxometalate complexes of ciprofloxacin with H_nXW₁₂O₄₀ (X=B, Si, P) were prepared from ciprofloxacin hydrochloride and H_nXW₁₂O₄₀·nH₂O (X=B, Si, P) in aqueous solution, and characterized by elemental analysis, IR spectra and TG-DTA. The IR spectrum confirmed the presence of Keggin-type anion of heteropoly acids and the characteristic functional group of ciprofloxacin after the polyoxometalate complexes are formed. The TG/DTA curves showed that their thermal decomposition was a more-steps process consisting of simultaneous processes involving also Keggin anion. The residue of decomposition is a mixture of WO₃ and B₂O₃, SiO₂ or P₂O₅, confirmed by X-ray diffraction and IR spectroscopy. And the possible thermal decomposition mechanisms of the complexes are proposed.

• Periodical: Advanced Materials Research (Volumes 335-336)
• Pages: 1075-1078
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.335-336.1075
• Online since: September 2011
• Authors: Dun Jia Wang, Yan Fang Kang, Ben Po Xu
• Keywords: Ciprofloxacin, Polyoxometalate Complexes, TG-DTA, Thermal Decomposition

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