Electrogenerated chemiluminescence. 58. Ligand-sensitized electrogenerated chemiluminescence in europium labels
Analytical Chemistry, ISSN: 0003-2700, Vol: 68, Issue: 15, Page: 2641-2650
1996
- 70Citations
- 1Usage
- 9Captures
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Metrics Details
- Citations70
- Citation Indexes70
- 70
- CrossRef66
- Usage1
- Abstract Views1
- Captures9
- Readers9
Article Description
The electrochemistry and electrogenerated chemiluminescence (ECL) of a series of europium chelates, cryptates, and mixed-ligand chelate/cryptand complexes were studied. The complexes were of the following general forms: EuL where L = β-diketonate, a bis-chelating ligand (such as dibenzoylmethide), added as salts (A)EuL, where A = tetrabutylammonium ion or piperidinium ion (pipH); Eu(crypt), where crypt = a cryptand ligand, e.g., 4,7,13,16,21-pentaoxa-1,10-diazabicyclo[8,8,5]-tricosane; and Eu(crypt)(L) for the mixed-ligand systems. ECL was obtained for the chelates and mixed-ligand systems by reducing the complexes at a Pt electrode in the presence of peroxydisulfate in acetonitrile solutions and was attributed to the electron-transfer reaction between the reduced bound ligands and SO, followed by intramolecular excitation transfer from the excited ligand orbitals to the metal-centered 4f states. No ECL was observed under the same conditions for the europium complexes incorporating only the cryptand ligands in aqueous solution. The ECL spectra matched the photo-luminescence spectra with a narrow emission band observed at 612 nm, corresponding to a metal-centered 4f-4f transition. The ECL efficiencies for the ECL-active species were low, about 10-10% of that of the Ru-(bpy)/SO system under similar conditions.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0000524827&origin=inward; http://dx.doi.org/10.1021/ac960211f; http://www.ncbi.nlm.nih.gov/pubmed/21619211; https://pubs.acs.org/doi/10.1021/ac960211f; https://bearworks.missouristate.edu/articles-cnas/3055; https://bearworks.missouristate.edu/cgi/viewcontent.cgi?article=4054&context=articles-cnas
American Chemical Society (ACS)
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