Understanding Electrogenerated Chemiluminescence Efficiency in Blue-Shifted Iridium(III)-Complexes: An Experimental and Theoretical Study
Gregory J Barbante, Egan H Doeven, Emily Kerr, Timothy U Connell, Paul S Donnelly, Jonathan M White, Thais Lopes, Sarah Laird, David JD Wilson, Peter J Barnard, Conor F Hogan, Paul S Francis
CHEMISTRY-A EUROPEAN JOURNAL | WILEY-V C H VERLAG GMBH | Published : 2014
Compared to tris(2-phenylpyridine)iridium(III) ([Ir(ppy)3 ]), iridium(III) complexes containing difluorophenylpyridine (df-ppy) and/or an ancillary triazolylpyridine ligand [3-phenyl-1,2,4-triazol-5-ylpyridinato (ptp) or 1-benzyl-1,2,3-triazol-4-ylpyridine (ptb)] exhibit considerable hypsochromic shifts (ca. 25-60 nm), due to the significant stabilising effect of these ligands on the HOMO energy, whilst having relatively little effect on the LUMO. Despite their lower photoluminescence quantum yields compared with [Ir(ppy)3 ] and [Ir(df-ppy)3 ], the iridium(III) complexes containing triazolylpyridine ligands gave greater electrogenerated chemiluminescence (ECL) intensities (using tri-n-propyl..View full abstract
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Awarded by Australian Research Council
This work was funded by the Australian Research Council (FT100100646, LE120100213, DP1094179). The Victorian Partnership for Advanced Computing (VPAC) and the National Computational Infrastructure National Facility (NCI-NF) are acknowledged for substantial computing resources.