Elmes, Robert B.P. and Gunnlaugsson, Thorfinnur
(2010)
Luminescence anion sensing via modulation of MLCT emission
from a naphthalimide-Ru(II)-polypyridyl complex.
Tetrahedron Letters, 51 (31).
pp. 4082-4087.
ISSN 0040-4039
Abstract
The selective sensing of fluoride (F¯; an important breakdown product of some chemical warfare agents such as sarin) was
achieved by observing quenching in the Metal to Ligand Charge Transfer (MLCT) emission of the 1,8-naphthalimide ruthenium conjugate
Ru-Nap-NH2, which occurs at long wavelengths in CH3CN, using steady state fluorescence spectroscopy. The F¯ recognition was also
visible to the naked eye, with a clear colour change from yellow to red. The sensing mechanism is most likely initially via hydrogen
bonding, between the anion and the amine, which at higher concentrations, gives rise to deprotonation of the acidic 4-amino-1,8-
naphthalimide moiety. However, counter ion effects may also be contributing to the overall emission changes. Other anions such as acetate,
phosphate and chloride also give rise to quenching in the fluorescence emission with only minor changes in the UV-Vis absorption spectra
of Ru-Nap-NH2. Moreover, phosphate also gave rise to shifts in the max in the emission spectra. © 2010 Elsevier Science. All rights
reserved
Item Type: |
Article
|
Additional Information: |
This is the postprint version of the published article, which is available at DOI: 10.1016/j.tetlet.2010.05.127 |
Keywords: |
Luminescence anion sensing; modulation; MLCT emission; naphthalimide-Ru(II)-polypyridyl complex; |
Academic Unit: |
Faculty of Science and Engineering > Chemistry |
Item ID: |
6993 |
Identification Number: |
https://doi.org/10.1016/j.tetlet.2010.05.127 |
Depositing User: |
Robert Elmes
|
Date Deposited: |
26 Feb 2016 16:56 |
Journal or Publication Title: |
Tetrahedron Letters |
Publisher: |
Elsevier |
Refereed: |
Yes |
URI: |
|
Use Licence: |
This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available
here |
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