Resolution and analysis of the components in dual emission of mixed-chelate/ortho-metalate complexes of iridium(III)

Journal Article · Thu Jan 24 04:00:00 EST 1991 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100155a026· OSTI ID:5761988

Wilde, A P; King, K A; Watts, R J ^[1]

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1. Univ. of California, Santa Barbara (USA)

Spectral resolutions of the two components in dual emissions for four mixed-chelate/ortho-metalated complexes of Ir(III) are reported. Resolution of the component emissions from samples of the complexes Ir(bzq){sub 2}(bpy){sup +} and Ir(bzq){sub 2}(phen){sup +} (bzq = benzo(h)quinoline, bpy = 2,2{prime}-bipyridine, phen = 1,10-phenanthroline) in rigid glasses at 77 K has been achieved by time-resolved emission spectroscopy. In each case the lower energy emissions component is assigned to a metal-to-ligand charge-transfer excited state associated with the chelating ligand and the higher energy component to a MLCT excited state associated with the ortho-metalating bzq ligand. Component in the dual emissions of Ir(ppy){sub 2}(bpy){sup +} and Ir(ppy){sub 2}(phen){sup +} (ppy = 2-phenylpyridine) are too similar in their lifetimes to permit full resolution of the two emissions by time-resolved emission spectroscopy when both components are populated by 337-nm excitation.

• DOE Contract Number: FG03-88ER13842
• OSTI ID: 5761988
• Journal Information: Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 95:2; ISSN 0022-3654; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
AROMATICS
AZAARENES
AZINES
BIPYRIDINES
COMPLEXES
DATA
EMISSION SPECTROSCOPY
EXPERIMENTAL DATA
HETEROCYCLIC COMPOUNDS
INFORMATION
IRIDIUM COMPLEXES
LOW TEMPERATURE
MEASURING METHODS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHENANTHROLINES
PYRIDINES
QUINOLINES
SPECTRAL RESPONSE
SPECTROSCOPY
TRANSITION ELEMENT COMPLEXES