反应详情

600 g of xylitol and 140 g of chromium (III) chloride hexahydrate were dissolved in 1200 g of water at 85° C. with stirring to produce a solution. The pH of the solution was raised to about 9 by adding rapidly in one portion a suitable amount of an aqueous solution containing 20 wt % of sodium hydroxide. Within 20 minutes a blue transparent solution having a strong laser scattering characteristic was then obtained. This strong laser scattering property indicated formation of chromium xylitol nanoclusters. The nanoclusters were isolated from the solvent and free ions through cross-flow membrane filtration using a membrane with a molecular weight cut-off at 3500 Dalton. The isolated nanoclusters were further dried in an oven at 80° C. to form a dark red solid, which was further ground into a free flow powder. Atomic absorption spectroscopy of the thus-obtained nanoclusters indicated that the nanoclusters had a chromium content of 8.09 wt. %.

1. customto produce a solution
2. temperatureThe pH of the solution was raised to about 9
3. additionby adding rapidly in one portion a suitable amount of an aqueous solution
4. customa strong laser scattering characteristic was then obtained
5. customThe nanoclusters were isolated from the solvent and free ions through cross-flow membrane filtration
6. customThe isolated nanoclusters were further dried in an oven at 80° C.
7. customto form a dark red solid, which
8. customAtomic absorption spectroscopy of the thus-obtained nanoclusters