M. Montalti et L. Prodi, A SUPRAMOLECULAR ASSEMBLY CONTROLLED BY ANIONS - THREADING AND UNTHREADING OF A PSEUDOROTAXANE, Chemical communications, (14), 1998, pp. 1461-1462
The pseudorotaxane formed in CH2Cl2 solution by (9-anthrylmethyl)methy
lammonium hexafluorophosphate salt and dibenzo-24-crown-8 can be unthr
eaded by addition of NBu4Cl through the formation of a strong ammonium
chloride ion pair, while pseudorotaxane rethreading can be performed
by addition of NHBu3PF6; all these processes can be followed by pronou
nced changes in the luminescence spectra, which could allow the use of
this system as a fluorescent sensor for chloride ions.