Molecular Machines and Motors: Recent Advances and Perspectives

0438190 - ÚOCHB 2015 RIV DE eng M - Část monografie knihy
Zhao, K. - Dron, P. I. - Kaleta, Jiří - Rogers, C. T. - Michl, Josef
Arrays of Dipolar Molecular Rotors in Tris(o-phenylenedioxy)cyclotriphosphazene.
Molecular Machines and Motors: Recent Advances and Perspectives. Vol. 354. Cham: Springer, 2014 - (Credi, A.; Silvi, S.; Venturi, M.), s. 163-211. Topics in Current Chemistry. ISBN 978-3-319-08677-4
GRANT EU: European Commission(XE) 227756 - DIPOLAR ROTOR ARRAY
Institucionální podpora: RVO:61388963
Klíčová slova: dielectric spectroscopy * hexagonal TPP * inclusion compounds * molecular rotors * powder X-ray diffraction * solid-state NMR
Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie

Regular two-dimensional or three-dimensional arrays of mutually interacting dipolar molecular rotors represent a worthy synthetic objective. Their dielectric properties, including possible collective behavior, will be a sensitive function of the location of the rotors, the orientation of their axes, and the size of their dipoles. Host-guest chemistry is one possible approach to gaining fine control over these factors. We describe the progress that has been achieved in recent years using tris(o-phenylenedioxy)cyclotriphosphazene as a host and a series of rod-shaped dipolar molecular rotors as guests. Structures of both surface and bulk inclusion compounds have been established primarily by solid-state nuclear magnetic resonance (NMR) and powder X-ray diffraction (XRD) techniques. Low-temperature dielectric spectroscopy revealed rotational barriers as low as 1.5 kcal/mol, but no definitive evidence for collective behavior has been obtained so far.
Trvalý link: http://hdl.handle.net/11104/0241653