β-环糊精诱导的三氧化钼水溶性的增加(英文)  

Increased Water Solubility of Molybdenum Trioxide Induced by β-Cyclodextrin

作　　者：邵志成[1] 宋乐新[1] 滕越[1] 党政[1] 夏娟[1] 

机构地区：[1]中国科学技术大学化学系,合肥230026

出　　处：《物理化学学报》2013年第3期460-466,共7页Acta Physico-Chimica Sinica

基　　金：supported by the National Natural Science Foundation of China(21071139);National Synchrotron Radiation Laboratory at University of Science and Technology of China~~

摘　　要：报道了由β-环糊精诱导的三氧化钼(MoO3)水溶性增加及其与β-环糊精浓度的相关性,认为MoO3水溶性的增加是由于β-环糊精的加入导致了MoO3在水中的沉淀-溶解平衡向溶解方向移动.几个独立的实验证明了由β-环糊精和钼酸根离子(MoO42-)组成的灰蓝色产物的形成.结果表明:(1)X射线光电子能谱显示,与MoO3相比,灰蓝色产物中钼的3d5/2和3d3/2电子轨道的结合能有明显的降低;(2)在灰蓝色产物中出现了213nm处的强吸收带(Mo=O)和775nm处的宽吸收峰(Mo―O);(3)由于MoO42-的影响,β-环糊精的质子有很明显的低场漂移.总之,我们的工作不仅明确地揭示了β-环糊精和MoO42-之间的分子-离子相互作用,同时揭示了这种相互作用在改善MoO3物理性质上的潜在应用价值.Increased water solubility of molybdenum trioxide （MoO 3） 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 MoO 4 2by：（1） X-ray photoelectron spectroscopy showed decreased Mo3d 5/2 and 3d 3/2 binding energies of the product compared with those of MoO 3 ;（2） a strong band at 213nm and new broad peak near 775nm 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 MoO4 2ions.An interaction between β-CD and MoO4 2has been revealed and hints at the possibility of exploiting it for improving MoO3 physical properties.

关 键 词：Β-环糊精 三氧化钼 分子-离子相互作用 水溶性 

分 类 号：O614.612[理学—无机化学]