期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 17, 期 16, 页码 4640-4647出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201002956
关键词
click chemistry; cyclic voltammetry; electrochemiluminescence; iridium; N ligands
资金
- MIUR
- Fondazione Cassa di Risparmio in Bologna
- European Union through the Marie Curie Research and Training Network UNI-NANOCUPS
Cationic cyclometalated iridium complexes containing two anionic phenylpyridine (ppy) ligands and the neutral bidentate triazole-pyridine ligand, 2-(1-substituted-1H-1,2,3-triazol-4-yl)pyridine (pytl), were investigated. The complexes display a rich and reversible electrochemical behavior, upon investigations by cyclic voltammetry in strictly aprotic conditions, that couples with excellent emission quantum yields and long lifetimes of the excited states. Therefore, in organic media, all complexes have generated intense green electrochemiluminescence (ECL) through the so-called annihilation procedure and, importantly, a modulation of the emission energy (to blue) has been easily obtained by simple fluorination of the ppy ligand. Finally, taking advantage of their remarkable solubility in water, intense ECL was also obtained from aqueous buffer solutions using the co-reactant method, thus making all the investigated complexes highly promising for their effective use as ECL labels in bioanalytical applications.
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