Elsevier

Tetrahedron Letters

Volume 48, Issue 23, 4 June 2007, Pages 3959-3962
Tetrahedron Letters

8-Methoxyquinoline based turn-on metal fluoroionophores

https://doi.org/10.1016/j.tetlet.2007.04.045Get rights and content

Abstract

Novel turn-on fluoroionophores 2 and 3 based on highly fluorescent 8-methoxyquinoline were developed in which a sequential singlet–singlet energy transfer, ISC, and triplet–triplet energy transfer occurred leading to a fluorescence ‘off’ state. They showed substantially enhanced fluorescence in the presence of transition metal ions such as Zn2+, Cu2+, Pb2+, and Hg2+ and an extremely high selectivity toward Zn2+ by 3.

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Acknowledgments

This work was supported by NSFC grants 20425518 and 20675069, VolkswagenStiftung grant I/77 072, and the Ministry of Education (MOE) of China.

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