Ion-induced FRET on-off in fluorescent calix[4]arene.
A novel calix[4]arene bearing one 2,3-naphthocrown-6 and two coumarin amide units at the lower rim in partial-cone conformation was synthesized as a colorimetric and FRET-based fluorometric sensor for F(-) and Cs(+) ions. Intramolecular FRET from the naphthalene emission to the coumarin absorption affords high fluorescence selectivity toward F(-) and Cs(+) ions.
Lee
Min Hee
MH
Department of Chemistry, Dankook University, Seoul 140-714, Korea.
Quang
Duong Tuan
DT
Jung
Hyo Sung
HS
Yoon
Juyoung
J
Lee
Chang-Hee
CH
Kim
Jong Seung
JS