Abstract
Variations in the ratio of monomer/excimer emissions from pyrenyl groups bound to a calix[4]arene through facing carboxamidomethyl substituents have been investigated in H2O/CH3CN mixtures. Above a level of 50% H2O, monomer emission declines and the excimer emission concomitantly increases. DFT calculations support the argument that disruption of intramolecular NHO bonds by water results in a geometry, which favors contact of the pyrene units and thus a strong excimer emission. Addition of Fe(III) to a H2O/CH3CN (4:1, v/v) solution of 1 at pH 6.1 quenches both monomer and excimer emissions through electron transfer (eT) from excited pyrene to the metal ion.
Original language | English |
---|---|
Pages (from-to) | 10788-10792 |
Number of pages | 5 |
Journal | Tetrahedron |
Volume | 63 |
Issue number | 44 |
DOIs | |
Publication status | Published - 2007 Oct 29 |
ASJC Scopus subject areas
- Biochemistry
- Drug Discovery
- Organic Chemistry