| Autor: |
J. Bdzoch, I. Bugar, M. Zitnan, M. Janek, D. Chorvat, T. Palszegi, Vojtech Szöcs, D. Velic |
| Rok vydání: |
2006 |
| Předmět: |
|
| Zdroj: |
Femtochemistry VII |
| Popis: |
The confinement effect is a driving force for reactivity and function of chemical systems. Cyclodextrin-coumarin represents a confined system in a form of supramolecular host–guest inclusive complex. This chapter studies the interaction among coumarin C522, fluorescence probe, and montmorillonite by means of fluorescence dynamics. The high concentration of lithium on the surface decreased the surface vacancies, and water molecules were bound into lithium ions solvation shells. The low concentration of lithium on the surface increased the surface vacancies. The negative layer charge of montmorillonites can be modified by the fixation of small exchangeable cations. Lithium is used as a monovalent charge compensating cation on the surface and within the interlayer space to produce the reduced charge montmorillonite structure. The dynamic fluorescence Stokes shift of coumarins in the field of ions in liquid or solid matrix is studied. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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