Acta Phys. -Chim. Sin. ›› 2013, Vol. 29 ›› Issue (03): 460-466.doi: 10.3866/PKU.WHXB201301071

• THERMODYNAMICS, KINETICS, AND STRUCTURAL CHEMISTRY • Previous Articles     Next Articles

Increased Water Solubility of Molybdenum Trioxide Induced by β-Cyclodextrin

SHAO Zhi-Cheng, SONG Le-Xin, TENG Yue, DANG Zheng, XIA Juan   

  1. Department of Chemistry, University of Science and Technology of China, Hefei 230026, P. R. China
  • Received:2012-11-02 Revised:2013-01-07 Published:2013-02-25
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21071139) and National Synchrotron Radiation Laboratory at University of Science and Technology of China.

Abstract:

Increased water solubility of molybdenum trioxide (MoO3) induced by β-cyclodextrin (CD), with solubility dependent on β-CD concentration is reported. The dynamic equilibrium established between MoO3 precipitation and dissolution shifted towards dissolution upon the addition of aqueous β-CD, to form a bluish-grey product. This was confirmed to be of β-CD and MoO42- by: (1) X-ray photoelectron spectroscopy showed decreased Mo 3d5/2 and 3d3/2 binding energies of the product compared with those of MoO3; (2) a strong band at 213 nm and new broad peak near 775 nm of the product were attributed to Mo=O and Mo―O bond absorption; (3) a downfield shift of β-CD protons due to the effect of MoO42- ions. An interaction between β-CD and MoO42- has been revealed and hints at the possibility of exploiting it for improving MoO3 physical properties

Key words: β-Cyclodextrin, Molybdenum trioxide, Molecule-ion interaction, Water solubility

MSC2000: 

  • O641