(Chemical Equation Presented) A new fluorogenic cone calixtriazacrown-5 (1) bearing two pyrene amide groups and its structural analogue 2 have been prepared. Excited at 343 nm, 1 and 2 reveal excimer emissions at 448 and 472 nm, respectively. When heavy metal ions such as Pb2+ and Co2+ are bound to 1, the fluorescence intensities of both monomer and excimer are quenched whereas H bonding-assisted F- binding to 1 gives rise to a quenched monomer emission with little excimer emission change.
|Number of pages||4|
|Journal||Journal of Organic Chemistry|
|Publication status||Published - 2005 Feb 18|
ASJC Scopus subject areas
- Organic Chemistry