Blue Electrogenerated Chemiluminescence from Water-Soluble Iridium Complexes Containing Sulfonated Phenylpyridine or Tetraethylene Glycol Derivatized Triazolylpyridine Ligands

Chemistry : a European Journal
Emily KerrPaul S Francis

Abstract

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 tha...Continue Reading

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Citations

Mar 5, 2016·Inorganic Chemistry·Timothy U ConnellPaul S Donnelly
Jun 4, 2016·Analytical and Bioanalytical Chemistry·Andrzej Kapturkiewicz
Jul 5, 2018·Physical Chemistry Chemical Physics : PCCP·Lachlan C SoulsbyPaul S Francis
Nov 16, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Sebastian AmthorSven Rau
Jan 26, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Chao HuangQijun Song
Sep 27, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Shinogu SebataShigeru Murata
Dec 23, 2016·The Journal of Physical Chemistry. B·Kelsey R BreretonThomas R Cundari

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