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A Heteronuclear Bidentate Lewis Acid as a Phosphorescent Fluoride Sensor
Abstract
Reaction of dimesityl-1,8-naphthalenediylborate (1) with C6F5HgCl results in the formation of a B/Hg heteronuclear bidentate Lewis acid (2), which complexes fluoride to afford [2-mu2-F]-. Structural and photophysical studies carried out in solution and in the solid state indicate that 2 is a highly selective and sensitive phosphorescent fluoride sensor. The proximity of the two Lewis acidic sites enforced by the 1,8-naphthalenediyl backbone promotes fluoride anion chelation and is, therefore, responsible for the high binding constant. The interplay of conjugative and spin-orbit coupling effects mediated by the boron and mercury atoms, respectively, results in the phosphorescent signaling of fluoride binding. Remarkably, fluoride binding occurs in partially aqueous solutions and results in a drastic change of the phosphorescence observed when the solutions are frozen.
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Cited by
Recognition and sensing of fluoride anion
Cametti, M., & Rissanen, K. (2009) · Chemical Communications · doi:10.1039/b902069a · Cited by 654
Metadata
- Authors
- Melaimi, M., & Gabbaï, F. P.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2005-06-18
- Volume
- 127
- Issue
- 27
- Pages
- 9680-9681
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2077512417
- Cited by
- 252
- References
- 0
- FWCI
- 8.10
- Type
- journal article
- Language
- en
- Open access
- closed
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