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


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.


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