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Zoekopdracht: faculteit: "FNWI" en publicatiejaar: "2003"

AuteursA.M. Brouwer, S.M. Fazio, C. Frochot, F.G. Gatti, D.A. Leigh, J.K.Y. Wong, G.W.H. Wurpel
TitelPhotoinduced dynamics in hydrogen-bonded rotaxanes
TijdschriftPure and Applied Chemistry
Jaargang75
Jaar2003
Nummer8
Pagina's1055-1060
ISSN00334545
FaculteitFaculteit der Natuurwetenschappen, Wiskunde en Informatica
Instituut/afd.FNWI: Van 't Hoff Institute for Molecular Sciences (HIMS)
Trefwoordenrotaxanes; photochemistry; macromolecules; isomerization; electron-transfer
Basisclassificatie35.16 ; 35.51 ; 35.53
SamenvattingTwo classes of rotaxanes are described in which photoinduced processes modulate a large-amplitude motion. In the first type, E-Z-isomerization of a fumaric diamide unit to a maleic diamide leads to a substantial weakening of the hydrogen bonds between the diamide and the macrocyclic ring that surrounds it. As a result, the rate of the pirouetting motion is increased approximately by six orders of magnitude. In the second type, intermolecular photoinduced electron transfer is used to induce a reversible shuttling motion on a time scale of microseconds. Medium effects on the rate of shuttling are presented.
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