High efficiency electrochemiluminescence from polyaniline:ruthenium metal complex films

Electrochemiluminescent films have been formed by electrodepositing polyaniline, PANI, in the presence of [Ru(bpy)2PIC]2+; bpy is 2,2′-bipyridyl and PIC is (2,2′-bipyridyl)-2(4-carboxylphenyl) imidazo [4,5][1,10] phenanthroline. The homogeneous charge transport diffusion coefficient, DCT, for the Ru...

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Bibliographic Details
Published in:Electrochemistry communications 2014-11, Vol.48, p.95-98
Main Authors: Molapo, Kerileng M., Venkatanarayanan, Anita, Dolan, Ciaran M., Prendergast, Una, Baker, Priscilla G., Iwuoha, Emmanuel I., Keyes, Tia E., Forster, Robert J.
Format: Article
Language:English
Subjects:
Chemistry
Electrochemiluminescence
Electrochemistry
Exact sciences and technology
General and physical chemistry
Photoelectrochemistry. Electrochemiluminescence
Polyaniline
Ruthenium
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Summary:Electrochemiluminescent films have been formed by electrodepositing polyaniline, PANI, in the presence of [Ru(bpy)2PIC]2+; bpy is 2,2′-bipyridyl and PIC is (2,2′-bipyridyl)-2(4-carboxylphenyl) imidazo [4,5][1,10] phenanthroline. The homogeneous charge transport diffusion coefficient, DCT, for the Ru2+/3+ couple within the PANI film is 2.6±0.9×10−10cm2s−1. The large DCT facilitates a fast regeneration of Ru3+ and, coupled to a relatively rigid microenvironment, results in a high ECL intensity in the presence of tripropylamine as a co-reactant compared to [Ru(bpy)3]2+. Significantly, despite the conducting nature of the polymer backbone, the [Ru(bpy)2PIC]2+ loaded PANI has the highest efficiency, 1.00%, yet reported for a surface confined ruthenium complex. [Display omitted] •Rapid charge transport through polyaniline–ruthenium metal complex composite•Composites yield highly efficient electrochemiluminescence.•Metal complexes in a conducting polymer matrix can lead to bright ECL.
ISSN:1388-2481
1873-1902
DOI:10.1016/j.elecom.2014.08.022