Bifunctional Fluorescent Calixarene Chemosensor for Both a Cation and an Anion
journal contributionposted on 18.02.2005 by Ji Yeon Lee, Sung Kuk Kim, Jong Hwa Jung, Jong Seung Kim
Any type of content formally published in an academic journal, usually following a peer-review process.
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.