The effects of pendant vs. fused thiophene attachment upon the luminescence lifetimes and electrochemistry of tris(2,2′-bipyridine)ruthenium(II) complexes

Nurkkala, Lasse J., Steen, Robert O., Friberg, Henrik K. J., Häggström, Johanna A., Bernhardt, Paul V., Riley, Mark J. and Dunne, Simon J. (2008) The effects of pendant vs. fused thiophene attachment upon the luminescence lifetimes and electrochemistry of tris(2,2′-bipyridine)ruthenium(II) complexes. European Journal of Inorganic Chemistry, 2008 26: 4101-4110. doi:10.1002/ejic.200800456


Author Nurkkala, Lasse J.
Steen, Robert O.
Friberg, Henrik K. J.
Häggström, Johanna A.
Bernhardt, Paul V.
Riley, Mark J.
Dunne, Simon J.
Title The effects of pendant vs. fused thiophene attachment upon the luminescence lifetimes and electrochemistry of tris(2,2′-bipyridine)ruthenium(II) complexes
Journal name European Journal of Inorganic Chemistry   Check publisher's open access policy
ISSN 1434-1948
1099-0682
Publication date 2008-09-01
Sub-type Article (original research)
DOI 10.1002/ejic.200800456
Volume 2008
Issue 26
Start page 4101
End page 4110
Total pages 10
Editor Rinaldo Poli
Place of publication Weinheim, Germany
Publisher Wiley-VCH
Collection year 2009
Language eng
Formatted abstract
The electrochemical and photophysical properties for a range of tris(2,2-bipyridine)ruthenium(II) complexes in which a thiophene substituent is attached to one of the bipyridine ligands by either a pendant or a fused mode have been determined. The fused mode of attachment eliminates torsional movement between the thiophene unit and the chelating bipyridine, thereby offering optimal overlap between the π-systems of the chelating unit and the attached thiophene unit. The electrochemical properties of these complexes were found to be similar; however, the luminescence lifetimes and intensities (in CH3CN at room temperature) were found to be correlated to the mode of attachment. The longest luminescence lifetime was observed for the complex [Ru(bpy)2{4-(thiophen-2-yl)-2,2-bipyridine}]2+ (3000 ns), as compared to the prototypic [Ru(bpy)3]2+ (1745 ns). This complex also had the highest quantum yield (0.045). In the four isomeric complexes, where the thiophene ring was fused to the b or c face of the pyridine ring, the lifetimes fell in the interval 275-1510 ns, and the quantum yield ranged between 0.0047 and 0.014.
© Wiley-VCH Verlag GmbH & Co. KGaA
Keyword Luminescence
N ligands
Ruthenium
Ligand design
Cyclic voltammetry
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
School of Chemistry and Molecular Biosciences
 
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Created: Sat, 14 Mar 2009, 01:55:11 EST by Jennifer Falknau on behalf of School of Chemistry & Molecular Biosciences