Symmetry as a new element to control molecular switches
Datum
Betreuer/Gutachter
Weitere Beteiligte
Herausgeber
Zeitschriftentitel
ISSN der Zeitschrift
Bandtitel
Verlag
Zitierlink
Zusammenfassung
The isomerization properties of an azocarbazole macrocycle in solution were investigated utilizing NMR spectroscopy with in situ irradiation in combination with DFT calculations. It was demonstrated that the position of azo units in a rigid macrocyclic system influences the photoisomerization pathway even if the initial all-E isomer is highly symmetric. Furthermore, the effect of ring strain on lowering the rates of thermal isomerization was demonstrated and a mechanism via an inversion-rotation proposed. The herein presented results and methods give new insights into the general nature of the azobenzene unit. In particular we illustrate the effect of symmetry changes due to macrocyclic arrangement on the photochemical and thermal isomerization properties, which will stimulate future development towards multinary molecular switches.
Beschreibung
Inhaltsverzeichnis
Anmerkungen
Erstpublikation in
undefined (2014)