Characterization of cyclodeztrins by positron annihilation spectroscopy

摘要：

Cyclodextrins (CD) are rigid, doughnut-shaped molecules formed by joining glucose units together in rings. Depending on the amount of glucose units 6, 7 or 8, respectively α, β or γ-CD are formed. In this way the molecules have an internal open cavity with a radius ranging from 0.5 to 0.9nm depending on the number of glucose units as is presented in figure 1.The characterization of these nanomolecules stays challenging. Positron annihilation spectroscopy is known for its in situ probing of open volumes or cavities making use of the fact that the lifetime of the ortho-positronium is related to the size of the open volume.

作者: J De Baerdemaeker E.Eeckhout A.Deratani F.Duprez

作者单位: Department of Subatomic and Radiation Physics,Ghent University,Belgium Department of Organic Chemistry,Polymer Chemistry Research Group,Ghent University,Belgium Institut Européen des Membranes,Université Montpellier Ⅱ,,France

会议类型: 国际会议

会议名称: 第九届国际正电子与正电子素国际会议(9th International Workshop on Positron and Positronium Chemistry)(PPC–9)

会议地点: 武汉

会议语种:英文

页码: 28

在线出版日期: 2008-05-11（万方平台首次上网日期，不代表论文的发表时间）