DSC, IR, UV-vis and XRD analysis showed that an inclusion compound was formed from 12-molybdenum phosphoric acid and dextran. The photochromism of the yellow inclusion compound was studied by ESR, XPS, IR and UV-vis spectra. it was shown that photoelectron transfer reaction between 12-molybdenum phosphoric acid and dextran in yellow inclusion compound occurred. The obtained product was blue-violet and composed of blue-violet multivalent molybdenum (Ⅵ, Ⅴ,Ⅳ) complex and colorless dextran with the partial carbonyl groups. DSC, UV-vis, IR and XRD measurements indicate that photochromic product mentioned above is also a kind of inclusion compound. Owing to the formation of this inclusion compound, the stability of photochromism is rised.

Key words: GLUCAN, PHOTOCHROMISM, STABILITY, DIFFERENTIAL SCANNING CALORIMETRY, INFRARED SPECTROPHOTOMETRY, MOLYBDENUM COMPLEX, DIFFERENTIAL SCANNING CALORIMETRY, INFRARED SPECTROPHOTOMETRY, X-RAY DIFFRACTION ANALYSIS