jo048228i_si_001.pdf (191.56 kB)
Bifunctional Fluorescent Calix[4]arene Chemosensor for Both a Cation and an Anion
journal contribution
posted on 2005-02-18, 00:00 authored by Ji Yeon Lee, Sung Kuk Kim, Jong Hwa Jung, Jong Seung KimA new fluorogenic cone calix[4]triazacrown-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.