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A highly selective pyrene based fluorescent sensor toward Hg2+ detection

✍ Scribed by Yang Yang; Xiaojun Gou; John Blecha; Haishi Cao

Publisher
Elsevier Science
Year
2010
Tongue
French
Weight
477 KB
Volume
51
Category
Article
ISSN
0040-4039

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✦ Synopsis

A new pyrene-containing fluorescent sensor has been synthesized from 2,3,3-trimethylindolenine. Spectroscopic and photophysical properties of sensor are presented. The large change in fluorescence intensity (I/I 0 = 0.13) at 381 nm and affinity to Hg 2+ over other cations such as K + , Na + , Ca 2+ , Mg 2+ , Pb 2+ , and Cu 2+ make this compound a useful chemosensor for Hg 2+ detection in hydrophilic media. The sensor (6.0 Γ‚ 10 Γ€6 M) displays significant fluorescence quenching upon addition of Hg 2+ in pH 7.4 HEPES buffer without excimer formation. Job's plot analysis shows the binding stoichiometry to be 2:1 (host/guest).

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