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Issue 5, 2006
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A calixarene based fluorescent Sr2+ and Ca2+ probe

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A fluorescent probe, PyCalix, which has two pyrene moieties at the lower rim of a calix[4]arene fixed in the cone conformation was synthesized and its complexation behavior with alkali and alkaline earth cations was studied by fluorescence spectrometry. The compound showed intramolecular excimer emission at approximately 480 nm in the fluorescence spectra. Upon complexation with alkaline earth metal cations, a decrease of excimer emission was observed. The decrease of excimer emission was accompanied by an increase of monomer emission of pyrenes at 397 nm. The order of complexation constants of PyCalix with metal ions was Sr2+ ∼ Ca2+ > Ba2+ > Mg2+ > K+ > Na+ > Cs+ for all reagents. PyCalix doped polyvinyl chloride (PVC) membrane was fabricated and our results showed that this membrane can be used for selective detection of Sr2+.

Graphical abstract: A calixarene based fluorescent Sr2+ and Ca2+ probe

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Article information

16 Dec 2005
18 Jan 2006
First published
27 Jan 2006

Org. Biomol. Chem., 2006,4, 770-772
Article type

A calixarene based fluorescent Sr2+ and Ca2+ probe

H. Ji, Y. Yang, X. Xu and G. Brown, Org. Biomol. Chem., 2006, 4, 770
DOI: 10.1039/B517877K

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