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Molecules 2008, 13(4), 922-930; doi:10.3390/molecules13040922

Selective Dendritic Fluorescent Sensors for Zn(II)

,  and *
The Key Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, P.R. China
* Author to whom correspondence should be addressed.
Received: 6 April 2008 / Revised: 17 April 2008 / Accepted: 18 April 2008 / Published: 19 April 2008
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A series of dendritic 8-hydroxyquinoline (8-HQ) and 5-dialkyl(aryl)aminomethyl-8-HQ derivatives were synthesized and their fluoroionophoric properties towardrepresentative alkali, alkaline earth, group IIIA and transition metal ions wereinvestigated. Among the selected ions, Zn(II) enhanced the fluorescence of N-di-(methoxycarbonylethyl)aminoethyl-3-[4-(8-hydroxyquinolin-5-ylmethyl)piperazin-1-yl]-propanoic amide] (7) by 31-fold, while Al(III) caused enhancement to some extent. Theabsence of any significant fluorescence enhancement by the other ions examined renders 7a highly useful Zn(II)-selective fluorescent sensor.
Keywords: Dendritic; 8-hydroxyquinoline; Zn2+; fluorescence enhancement. Dendritic; 8-hydroxyquinoline; Zn2+; fluorescence enhancement.
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Wang, F.; Peng, R.; Sha, Y. Selective Dendritic Fluorescent Sensors for Zn(II). Molecules 2008, 13, 922-930.

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