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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) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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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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