Subtle Modification of 2,2-Dipicolylamine Lowers the Affinity and Improves the Turn-On of Zn(II)-Selective Fluorescent Sensors
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Lippard_Subtle modification.pdf
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Author(s)
Wong, Brian A.
Friedle, Simone
Lippard, Stephen J.
Date Issued
July 2009
Journal
Inorganic Chemistry
Publisher
American Chemical Society (ACS)
Citation
Wong, Brian A., Simone Friedle, and Stephen J. Lippard. “Subtle Modification of 2,2-Dipicolylamine Lowers the Affinity and Improves the Turn-On of Zn(II)-Selective Fluorescent Sensors.” Inorganic Chemistry 48, no. 15 (August 3, 2009): 7009-7011.
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Author's final manuscript
Abstract
The spectroscopic and proton- and Zn(II)-binding properties of two new members of the Zinpyr family of fluorescent sensors are reported. In ZP1B and ZP3B, a (2-picolyl)(4-picolyl)amine (2,4-DPA) moiety is installed in place of the di(2-picolyl)amine (2,2-DPA) ligand used in the parent sensors ZP1 and ZP3. This modification has the benefit of both lowering the proton-induced turn-on at physiological pH levels and altering the Zn(II) affinity so as to detect only the most concentrated stores of this ion in biological samples. Comparison of the proton affinities of all four probes, as determined by potentiometric titrations, contributes to our understanding of the solution properties of this family of sensors.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
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DOI of Published Version
https://doi.org/10.1021/ic900990w
