ANOMALOUS BEHAVIOR OF Ir(III) CYCLOMETALATED COMPLEXES: APPLICATION IN LIGHT-EMITTING ELECTROCHEMICAL CELLS

The cationic Ir(III) complex with 7,8-benzoquinoline (bzq) as cyclometalating ligand and 4,4'-diterbutyl-2,2'-bipyridine (tBuB) as ancillary ligand, [Ir(bzq)2(tBuB)](PF6) (1), was utilized in the fabrication of a light-emitting electrochemical cell (LEC). The photophysical properties and t...

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Autores principales:	DREYSE,PAULINA, LOEB,BÁRBARA, BARRERA,MAURICIO, GONZÁLEZ,IVÁN
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2014
Materias:	light-emitting electrochemical cell cyclometalated complexes phosphorescence fluorescence
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072014000300023
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spelling	oai:scielo:S0717-970720140003000232014-12-15ANOMALOUS BEHAVIOR OF Ir(III) CYCLOMETALATED COMPLEXES: APPLICATION IN LIGHT-EMITTING ELECTROCHEMICAL CELLSDREYSE,PAULINALOEB,BÁRBARABARRERA,MAURICIOGONZÁLEZ,IVÁN light-emitting electrochemical cell cyclometalated complexes phosphorescence fluorescence The cationic Ir(III) complex with 7,8-benzoquinoline (bzq) as cyclometalating ligand and 4,4'-diterbutyl-2,2'-bipyridine (tBuB) as ancillary ligand, [Ir(bzq)2(tBuB)](PF6) (1), was utilized in the fabrication of a light-emitting electrochemical cell (LEC). The photophysical properties and the characterization of the LEC device with this complex was compared with literature data for the analogous complex with 2-phenylpyridine (ppy), [Ir(ppy)2(tBuB)](PF6) (2). Complex 1 showed blue shifted emission compared to complex 2. Surprisingly, complex 1 shows lower luminance, efficiency and stability in regard to 2. This behavior correlated well with the low values of quantum yield and lifetime, registered for complex 1 in solution. The performance observed is unexpected, taking into account the emission wavelengths recorded for each complex, and the lesser non radiative deactivation processes expected for a complex with a more rigid ligand as bzq. A possible explanation of this behavior is given in terms of the predominance of a fluorescent emission in the case of the complex 1 instead of a phosphorescent emission, as observed for complex 2.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.59 n.3 20142014-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072014000300023en10.4067/S0717-97072014000300023
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	light-emitting electrochemical cell cyclometalated complexes phosphorescence fluorescence
spellingShingle	light-emitting electrochemical cell cyclometalated complexes phosphorescence fluorescence DREYSE,PAULINA LOEB,BÁRBARA BARRERA,MAURICIO GONZÁLEZ,IVÁN ANOMALOUS BEHAVIOR OF Ir(III) CYCLOMETALATED COMPLEXES: APPLICATION IN LIGHT-EMITTING ELECTROCHEMICAL CELLS
description	The cationic Ir(III) complex with 7,8-benzoquinoline (bzq) as cyclometalating ligand and 4,4'-diterbutyl-2,2'-bipyridine (tBuB) as ancillary ligand, [Ir(bzq)2(tBuB)](PF6) (1), was utilized in the fabrication of a light-emitting electrochemical cell (LEC). The photophysical properties and the characterization of the LEC device with this complex was compared with literature data for the analogous complex with 2-phenylpyridine (ppy), [Ir(ppy)2(tBuB)](PF6) (2). Complex 1 showed blue shifted emission compared to complex 2. Surprisingly, complex 1 shows lower luminance, efficiency and stability in regard to 2. This behavior correlated well with the low values of quantum yield and lifetime, registered for complex 1 in solution. The performance observed is unexpected, taking into account the emission wavelengths recorded for each complex, and the lesser non radiative deactivation processes expected for a complex with a more rigid ligand as bzq. A possible explanation of this behavior is given in terms of the predominance of a fluorescent emission in the case of the complex 1 instead of a phosphorescent emission, as observed for complex 2.
author	DREYSE,PAULINA LOEB,BÁRBARA BARRERA,MAURICIO GONZÁLEZ,IVÁN
author_facet	DREYSE,PAULINA LOEB,BÁRBARA BARRERA,MAURICIO GONZÁLEZ,IVÁN
author_sort	DREYSE,PAULINA
title	ANOMALOUS BEHAVIOR OF Ir(III) CYCLOMETALATED COMPLEXES: APPLICATION IN LIGHT-EMITTING ELECTROCHEMICAL CELLS
title_short	ANOMALOUS BEHAVIOR OF Ir(III) CYCLOMETALATED COMPLEXES: APPLICATION IN LIGHT-EMITTING ELECTROCHEMICAL CELLS
title_full	ANOMALOUS BEHAVIOR OF Ir(III) CYCLOMETALATED COMPLEXES: APPLICATION IN LIGHT-EMITTING ELECTROCHEMICAL CELLS
title_fullStr	ANOMALOUS BEHAVIOR OF Ir(III) CYCLOMETALATED COMPLEXES: APPLICATION IN LIGHT-EMITTING ELECTROCHEMICAL CELLS
title_full_unstemmed	ANOMALOUS BEHAVIOR OF Ir(III) CYCLOMETALATED COMPLEXES: APPLICATION IN LIGHT-EMITTING ELECTROCHEMICAL CELLS
title_sort	anomalous behavior of ir(iii) cyclometalated complexes: application in light-emitting electrochemical cells
publisher	Sociedad Chilena de Química
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072014000300023
work_keys_str_mv	AT dreysepaulina anomalousbehaviorofiriiicyclometalatedcomplexesapplicationinlightemittingelectrochemicalcells AT loebbarbara anomalousbehaviorofiriiicyclometalatedcomplexesapplicationinlightemittingelectrochemicalcells AT barreramauricio anomalousbehaviorofiriiicyclometalatedcomplexesapplicationinlightemittingelectrochemicalcells AT gonzalezivan anomalousbehaviorofiriiicyclometalatedcomplexesapplicationinlightemittingelectrochemicalcells
_version_	1718445524583972864

ANOMALOUS BEHAVIOR OF Ir(III) CYCLOMETALATED COMPLEXES: APPLICATION IN LIGHT-EMITTING ELECTROCHEMICAL CELLS

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