An Acid−Base Switchable [2]Rotaxane
| Autor: | Arkadij M. Elizarov, Sheng-Hsien Chiu, J. Fraser Stoddart |
|---|---|
| Rok vydání: | 2002 |
| Předmět: | |
| Zdroj: | The Journal of Organic Chemistry. 67:9175-9181 |
| ISSN: | 1520-6904 0022-3263 |
| DOI: | 10.1021/jo020373d |
| Popis: | A chemically addressable, bistable [2]rotaxane, which incorporates a dumbbell-shaped component containing both secondary dialkylammonium and 1,2-bis(pyridinium)ethane recognition sites for its ring component, dibenzo[24]crown-8 (DB24C8), has been assembled. (1)H NMR spectroscopy has demonstrated that deprotonation (and reprotonation) of the secondary dialkylammonium (dialkylamine) recognition site induces the DB24C8 ring to move away from this site to the 1,2-bis(pyridinium)ethane one (and back again) in a discrete manner, particularly when the experiment is performed in CDCl(3) solution. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|