skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

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

Abstract

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.

Authors:
; ;  [1]
  1. Univ. of California, Santa Barbara (USA)
Publication Date:
OSTI Identifier:
5761988
DOE Contract Number:  
FG03-88ER13842
Resource Type:
Journal Article
Journal Name:
Journal of Physical Chemistry; (USA)
Additional Journal Information:
Journal Volume: 95:2; Journal ID: ISSN 0022-3654
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; IRIDIUM COMPLEXES; EMISSION SPECTROSCOPY; BIPYRIDINES; EXPERIMENTAL DATA; LOW TEMPERATURE; MEASURING METHODS; PHENANTHROLINES; QUINOLINES; SPECTRAL RESPONSE; AROMATICS; AZAARENES; AZINES; COMPLEXES; DATA; HETEROCYCLIC COMPOUNDS; INFORMATION; NUMERICAL DATA; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; PYRIDINES; SPECTROSCOPY; TRANSITION ELEMENT COMPLEXES; 400102* - Chemical & Spectral Procedures

Citation Formats

Wilde, A P, King, K A, and Watts, R J. Resolution and analysis of the components in dual emission of mixed-chelate/ortho-metalate complexes of iridium(III). United States: N. p., 1991. Web. doi:10.1021/j100155a026.
Wilde, A P, King, K A, & Watts, R J. Resolution and analysis of the components in dual emission of mixed-chelate/ortho-metalate complexes of iridium(III). United States. doi:10.1021/j100155a026.
Wilde, A P, King, K A, and Watts, R J. Thu . "Resolution and analysis of the components in dual emission of mixed-chelate/ortho-metalate complexes of iridium(III)". United States. doi:10.1021/j100155a026.
@article{osti_5761988,
title = {Resolution and analysis of the components in dual emission of mixed-chelate/ortho-metalate complexes of iridium(III)},
author = {Wilde, A P and King, K A and Watts, R J},
abstractNote = {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.},
doi = {10.1021/j100155a026},
journal = {Journal of Physical Chemistry; (USA)},
issn = {0022-3654},
number = ,
volume = 95:2,
place = {United States},
year = {1991},
month = {1}
}