Pyrene excimer-based calix[4]arene FRET chemosensor for mercury(II).
A novel calix[4]arene derivative locked in the 1,3-alternate conformation (2) bearing two pyrene and rhodamine fluorophores was synthesized as a selective sensor for the Hg(2+) ion. The sensoring is based on FRET from pyrene excimer emissions to ring-opened rhodamine absorption upon complexation of the Hg(2+) ion. Addition of Hg(2+) to a mixed solution of 2 gave significantly enhanced fluorescence at ∼576 nm via FRET with excitation at 343 nm. We also found that the pyrene excimer emissions formed by the intramolecular π-π interactions are more effective in obtaining strong FRET bands than those by intermolecular π-π interactions.
Department of Chemistry, Korea University, Seoul 130-701, Korea.
Young Hoon
YH
Lee
Min Hee
MH
Lee
Jun Feng
JF
Zhang
Jong Seung
JS
Kim
D047250:Calixarenes / Q000737:chemistry*; D002623:Chemistry Techniques, Analytical / Q000295:instrumentation*; D019281:Dimerization; D031541:Fluorescence Resonance Energy Transfer; D008628:Mercury / Q000032:analysis* / Q000737:chemistry; D010636:Phenols / Q000737:chemistry*; D011721:Pyrenes / Q000737:chemistry*; D012235:Rhodamines / Q000737:chemistry; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet
D010636:Phenols; D011721:Pyrenes; D012235:Rhodamines; C121325:calix(4)arene; D047250:Calixarenes; C030984:pyrene; D008628:Mercury