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Información del Artículo

Título:
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Spectroscopic and thermal characterization of the host-guest interactions between -, - and -cyclodextrins and vanadocene dichloride / Alexis Morales, Ralph T. Weber, Enrique Melendez
Autores:
En: Applied Organometallic Chemistry, vol 22, issue 8: Aug 2008, p 440-450. bibl.
Revista: Revistas extranjeras
Resumen: Host-guest interactions between -, - and -cyclodextrins and vanadocene dichloride (Cp2VCl2) have been investigated by a combination of thermogravimetric analysis, differential scanning calorimetry, powder X-ray diffraction and solid-state and solution electron paramagnetic resonance (EPR) spectroscopy. The solid-state results demonstrated that only - and -cyclodextrins form 1:1 inclusion complexes, while -cyclodextrin does not form an inclusion complex with Cp2VCl2. The - and -CD-Cp2VCl2 inclusion complexes exhibited anisotropic electron-51V (I = 7/2) hyperfine coupling constants whereas the -CD-Cp2VCl2 system showed only an asymmetric peak with no anisotropic hyperfine constant. On the other hand, solution EPR spectroscopy showed that -cyclodextrin (-CD) may be involved in weak host-guest interactions in equilibrium with free vanadocene species. Copyright © 2008 John Wiley & Sons, Ltd.
Palabras Claves: Palabras claves: cyclodextrin vanadocene dichloride EPR inclusion complex
Areas Temáticas:

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