Complexation of Polyoxometalates with Cyclodextrins
By Wu, Yilei; Shi, Rufei; Wu, Yi-Lin; Holcroft, James M.; Liu, Zhichang; Frasconi, Marco; Wasielewski, Michael R.; Li, Hui & Stoddart, J. Fraser
Published in Journal of the American Chemical Society
NULL
2015
Abstract
Although complexation of hydrophilic guests inside the cavities of hydrophobic hosts is considered to be unlikely, we demonstrate herein the complexation between γ- and β-cyclodextrins (γ- and β-CDs) with an archetypal polyoxometalate (POM)—namely, the [PMO??O?0]3- trianion—which has led to the formation of two organic-inorganic hybrid 2:1 complexes, namely [La(H?O)9]{[PMO??O?0]⊂[γ-CD]2} (CD-POM-1) and [La(H?O)9] {[PMO??O?0]⊂[β-CD]2} (CD-POM-2), in the solid state. The extent to which these complexes assemble in solution has been investigated by (i) 1H, 13C, and 31P NMR spectroscopies and (ii) small- and wide-angle X-ray scattering, as well as (iii) mass spectrometry. Single-crystal X-ray diffraction reveals that both complexes have a sandwich-like structure, wherein one [PMO??O?0]3- trianion is encapsulated by the primary faces of two CD tori through intermolecular [C-H···O═Mo] interactions. X-ray crystal superstructures of CD-POM-1 and CD-POM-2 show also that both of these 2:1 complexes are lined up longitudinally in a one-dimensional col
Microsoft is Ending Support for Windows 7
Microsoft will discontinue support for Windows 7 on January 14, 2020 which means Gamry will also be discontinuing support for Windows 7. If you are upgrading to Windows 10, like many companies and institutions, you need to be running Version 7 of our s oftware . Please note that only USB and Ethernet-based instruments can run in Version 7. Eligible users can download the latest version of our software through our online Client Portal .
If you haven't already registered your instrument, you can do so through the Client Portal .
Please email Technical Support if you have any questions regarding this transition. Please be sure to include your instrument model and serial number when contacting us.