Hindered fluorescence quenching in an insulated molecular wireThis is one of a number of contributions from the current members of the Dyson Perrins Laboratory to mark the end of almost 90 years of organic chemistry research in that building, as all its current academic staff move across South Parks Road to a new purpose-built laboratory.
- 29 August 2003
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Organic & Biomolecular Chemistry
- Vol. 1 (21) , 3851-3856
- https://doi.org/10.1039/b306727k
Abstract
A [3]rotaxane 2⊂12 consisting of an anionic phenylene ethynylene dumbbell 24− threaded through two cationic cyclophanes 12+ has been prepared using aqueous Glaser coupling. Stern–Volmer analysis of the fluorescence quenching using three different electron-acceptors (methyl viologen 132+, dipropyl-4,4′-bipyridinium disulfonate 14 and anthraquinone-2,6-disulfonate 152−) shows that the threaded cyclophanes inhibit electron-transfer from the excited state of the dumbbell by steric shielding, and by electrostatic shielding in the case of methyl viologen.Keywords
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