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Cucurbit[8]uril/Cucurbit[7]uril Controlled Off/On Fluorescence of the Acridizinium and 9‐Aminoacridizinium Cations in Aqueous Solution
Author(s) -
Wang Ruibing,
Yuan Lina,
Ihmels Heiko,
Macartney Donal H.
Publication year - 2007
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200700199
Subject(s) - fluorescence , aqueous solution , bromide , dimer , chemistry , cucurbituril , photochemistry , supramolecular chemistry , crystallography , inorganic chemistry , organic chemistry , crystal structure , optics , physics
The blue fluorescence of acridizinium bromide (ADZ + ) and the green fluorescence of 9‐aminoacridizinium bromide (AADZ + ) in aqueous solutions can be almost entirely switched off upon the double inclusion of these guests in the cavity of cucurbit[8]uril (CB[8]) owing to the formation of a nonfluorescent, noncovalent dimer complex, and then fluorescence can be effectively restored by adding cucurbit[7]uril (CB[7]) to the complex because it competitively extracts the fluorophores out of the CB[8] cavity.