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Blue electrogenerated chemiluminescence from water-soluble iridium complexes containing sulfonated phenylpyridine or tetraethylene glycol derivatized triazolylpyridine ligands

Kerr, Emily, Doeven, Egan H., Barbante, Gregory J., Connell, Timothy U., Donnelly, Paul S., Wilson, David J. D., Ashton, Trent D., Pfeffer, Frederick M. and Francis, Paul S. 2015, Blue electrogenerated chemiluminescence from water-soluble iridium complexes containing sulfonated phenylpyridine or tetraethylene glycol derivatized triazolylpyridine ligands, Chemistry, vol. 21, no. 42, pp. 14987-14995, doi: 10.1002/chem.201502037.

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Title Blue electrogenerated chemiluminescence from water-soluble iridium complexes containing sulfonated phenylpyridine or tetraethylene glycol derivatized triazolylpyridine ligands
Author(s) Kerr, Emily
Doeven, Egan H.ORCID iD for Doeven, Egan H. orcid.org/0000-0003-2677-4269
Barbante, Gregory J.
Connell, Timothy U.
Donnelly, Paul S.
Wilson, David J. D.
Ashton, Trent D.ORCID iD for Ashton, Trent D. orcid.org/0000-0002-6707-6064
Pfeffer, Frederick M.ORCID iD for Pfeffer, Frederick M. orcid.org/0000-0002-5441-6437
Francis, Paul S.ORCID iD for Francis, Paul S. orcid.org/0000-0003-4165-6922
Journal name Chemistry
Volume number 21
Issue number 42
Start page 14987
End page 14995
Total pages 9
Publisher Wiley
Place of publication Weinheim, Germany
Publication date 2015-10-12
ISSN 0861-9255
1521-3765
Keyword(s) electrochemiluminescence
electrochemistry
iridium
ligand effects
luminescence
Science & Technology
Physical Sciences
Chemistry, Multidisciplinary
Chemistry
SELECTIVE EXCITATION
COORDINATION-COMPOUNDS
CORRELATION-ENERGY
METAL-COMPLEXES
EXCITED-STATES
EMISSION COLOR
DENSITY
PHOSPHORESCENT
APPROXIMATION
Summary Incorporating phenylpyridine- and triazolylpyridine-based ligands decorated with methylsulfonate or tetraethylene glycol (TEG) groups, a series of iridium(III) complexes has been created for green and blue electrogenerated chemiluminescence under analytically useful aqueous conditions, with tri-n-propylamine as a coreactant. The relative electrochemiluminescence (ECL) intensities of the complexes were dependent on the sensitivity of the photodetector over the wavelength range and the pulse time of the applied electrochemical potential. In terms of the integrated area of corrected ECL spectra, with a pulse time of 0.5 s, the intensities of the Ir(III) complexes were between 18 and 102 % that of [Ru(bpy)3 ](2+) (bpy=2,2'-bipyridine). However, when the intensities were measured with a typical bialkali photomultiplier tube, the signal of the most effective blue emitter, [Ir(df-ppy)2 (pt-TEG)](+) (df-ppy=2-(2,4-difluorophenyl)pyridine anion, pt-TEG=1-(2-(2-(2-(2-hydroxyethoxy)ethoxy)ethoxy)ethyl)-4-(2-pyridyl)-1,2,3-triazole), was over 1200 % that of the orange-red emitter [Ru(bpy)3 ](2+) . A combined experimental and theoretical investigation of the electrochemical and spectroscopic properties of the Ir(III) complexes indicated that the greater intensity from [Ir(df-ppy)2 (pt-TEG)](+) relative to those of the other Ir(III) complexes resulted from a combination of many factors, rather than being significantly favored in one area.
Language eng
DOI 10.1002/chem.201502037
Field of Research 030101 Analytical Spectrometry
03 Chemical Sciences
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Grant ID ARC FT100100646
Copyright notice ©2015, Wiley
Persistent URL http://hdl.handle.net/10536/DRO/DU:30078737

Document type: Journal Article
Collection: School of Life and Environmental Sciences
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Created: Thu, 26 Nov 2015, 15:53:29 EST

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