期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 134, 期 42, 页码 17372-17375出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja307098z
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资金
- Wayne State University
- Elsa U. Pardee Foundation
- National Institute of Biomedical Imaging and Bioengineering of the National Institutes of Health [1R13EB015773-01]
A pH-responsive, luminescent, dimetallic Eu(III)-containing complex has been synthesized and exhibits a unique mechanism of response. The luminescence-decay rate of the complex is slow, due to a lack of water molecules coordinated to the Eu(III) ions. However, the luminescence-decay rate decreases with increasing pH over a biologically relevant. range of 4-8. Physical characterization and computational analysis suggest that the pH response is due to protonation of a bridging alkoxide at lower pH values. Modulation of the luminescence-decay rate is independent from the concentration of Eu(III), which we expect to be useful in the non-invasive imaging of in vivo pH.
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