Suzuki–Miyaura Cross-Coupling Reactions for Increasing the Efficiency of Tris-Heteroleptic Iridium(III) Emitters

The complex Ir­(acac)­{κ2-C,N-[C6BrH3-py]}­{κ2-C,N-[C6H4-py]} (2) is a green emitter, which displays short lifetimes (0.9–4.9 μs) and quantum yields of 0.32 in poly­(methyl methacrylate) films at 5 wt % and 0.41 in 2-methyltetrahydrofuran at room temperature. Its Pd­(OAc)2/4 PPh3-catalyzed cross-cou...

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Bibliographic Details
Published inOrganometallics Vol. 38; no. 15; pp. 2883 - 2887
Main Authors Boudreault, Pierre-Luc T, Esteruelas, Miguel A, Mora, Erik, Oñate, Enrique, Tsai, Jui-Yi
Format Journal Article
LanguageEnglish
Published WASHINGTON American Chemical Society 12.08.2019
Amer Chemical Soc
Subjects
Chemistry
Chemistry, Inorganic & Nuclear
Chemistry, Organic
Physical Sciences
Science & Technology
DESIGN
SERIES
LIGANDS
IR(III)
COMPLEXES
FLUORINE
DEGRADATION
PHOTOPHYSICAL PROPERTIES
EMISSION
PHOSPHORESCENT POLYMERS
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ISSN0276-7333
1520-6041
DOI10.1021/acs.organomet.9b00381

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Summary:The complex Ir­(acac)­{κ2-C,N-[C6BrH3-py]}­{κ2-C,N-[C6H4-py]} (2) is a green emitter, which displays short lifetimes (0.9–4.9 μs) and quantum yields of 0.32 in poly­(methyl methacrylate) films at 5 wt % and 0.41 in 2-methyltetrahydrofuran at room temperature. Its Pd­(OAc)2/4 PPh3-catalyzed cross-coupling reactions with RB­(OH)2 afford Ir­(acac)­{κ2-C,N-[C6RH3-py]}­{κ2-C,N-[C6H4-py]} (R = Me (3), Ph (4)), which show almost identical emissions with quantum yields in the range 0.98–0.82.
ISSN:0276-7333
1520-6041
DOI:10.1021/acs.organomet.9b00381