Calix[4]arene-based, Hg2+ -induced intramolecular fluorescence resonance energy transfer chemosensor.
A novel calix[4]arene-based chemosensor 1 based on Hg2+-induced fluorescence resonance energy transfer (FRET) was synthesized, and its sensing behavior toward metal ions was investigated by UV/vis and fluorescence spectroscopies. Addition of Hg2+ to a CH3CN solution of 1 gave a significantly enhanced fluorescence at approximately 575 nm via energy transfer (FRET-ON) from the pyrenyl excimer to a ring-opened rhodamine moiety. In contrast, addition of Al3+ induced a distinct increase of pyrenyl excimer emission ( approximately 475 nm), while no obvious FRET-ON phenomenon was observed. Different binding behaviors of 1 toward Hg2+ and Al3+ were also proposed for the interesting observation.
Othman
Amel Ben
AB
IPHC-ULP-ECPM-CNRS, 25 rue Becquerel, F-67087 Strasbourg Cédex, France.
Lee
Jeong Won
JW
Wu
Jia-Sheng
JS
Kim
Jong Seung
JS
Abidi
Rym
R
Thuéry
Pierre
P
Strub
Jean Marc
JM
Dorsselaer
Alain Van
AV
Vicens
Jacques
J
D047250:Calixarenes / Q000138:chemical synthesis / Q000737:chemistry*; D002413:Cations, Divalent / Q000737:chemistry; D031541:Fluorescence Resonance Energy Transfer; D005456:Fluorescent Dyes / Q000138:chemical synthesis / Q000737:chemistry*; D008628:Mercury / Q000737:chemistry*; D010636:Phenols / Q000138:chemical synthesis / Q000737:chemistry*; D012235:Rhodamines / Q000737:chemistry; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D013056:Spectrophotometry, Ultraviolet