Self-Assembly of an Amphiphilic [2]Rotaxane Incorporating a Tetrathiafulvalene Unit
摘要:
[GRAPHICS]The template-directed synthesis of a [2]rotaxane, in which a pi -electron deficient ring component-cyclobis(paraquat-p-phenylene)-is assembled around a pi -electron rich asymmetric monopyrrolotetrathiafulvalene unit on the rod section of an amphiphilic dumbbell component that is terminated by a hydrophilic dendritic stopper at one end and a hydrophobic tetraarylmethane stopper at the other end, is reported.
Self-Assembly of an Amphiphilic [2]Rotaxane Incorporating a Tetrathiafulvalene Unit
摘要:
[GRAPHICS]The template-directed synthesis of a [2]rotaxane, in which a pi -electron deficient ring component-cyclobis(paraquat-p-phenylene)-is assembled around a pi -electron rich asymmetric monopyrrolotetrathiafulvalene unit on the rod section of an amphiphilic dumbbell component that is terminated by a hydrophilic dendritic stopper at one end and a hydrophobic tetraarylmethane stopper at the other end, is reported.
作者:Jan O. Jeppesen、Kent A. Nielsen、Julie Perkins、Scott A. Vignon、Alberto Di Fabio、Roberto Ballardini、M. Teresa Gandolfi、Margherita Venturi、Vincenzo Balzani、Jan Becher、J. Fraser Stoddart
DOI:10.1002/chem.200204589
日期:2003.7.7
in the physical properties of these rotaxanes. The bistable [2]rotaxanes were both isolated as brown solids. 1 H NMR and UV-visible spectroscopy, and electrochemical investigations, reveal the presence of both possible translational isomers at ambient temperature. As a consequence of the existence of both possible translational isomers in these bistable [2]rotaxanes, they exhibit a complex electrochemical
作者:C. Patrick Collier、Jan O. Jeppesen、Yi Luo、Julie Perkins、Eric W. Wong、James R. Heath、J. Fraser Stoddart
DOI:10.1021/ja0114456
日期:2001.12.19
Solid-state tunnel junction devices were fabricated from Langmuir Blodgett molecular monolayers of a bistable [2]catenane, a bistable [2]pseudorotaxane, and a single-station [2]rotaxane. All devices exhibited a (noncapacitive) hysteretic current-voltage response that switched the device between high- and low-conductivity states, although control devices exhibited no such response. Correlations between the structure and solution-phase dynamics of the molecular and supramolecular systems, the crystallographic domain structure of the monolayer film, and the room-temperature device performance characteristics are reported.