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Title: Cyclometalated Iridium Bipyridine Complexes with Peripheral Antimony Substituents: Cyclometalated Iridium Bipyridine Complexes with Peripheral Antimony Substituents
Award ID(s):
1856453
PAR ID:
10178866
Author(s) / Creator(s):
;
Date Published:
Journal Name:
Zeitschrift für anorganische und allgemeine Chemie
Volume:
646
Issue:
13
ISSN:
0044-2313
Page Range / eLocation ID:
636 to 641
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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  1. Cyclometalated iridium complexes have emerged as top-performing emitters in organic light-emitting diodes (OLEDs) and other optoelectronic devices. A persistent challenge has been the development of cyclometalated iridium complexes with deep blue luminescence that have the requisite color purity, efficiency, and stability to function in color displays. In this work we report a new class of cyclometalated iridium complexes with saturated blue luminescence. These complexes have the general structure Ir(C^C: NHC ) 2 (C^C: ADC ), where C^C: NHC is an N-heterocyclic carbene (NHC) derived cyclometalating ligand and C^C: ADC is a different type of cyclometalating ligand featuring an acyclic diaminocarbene (ADC). The complexes are prepared by a cascade reaction that involves nucleophilic addition of propylamine to an isocyanide precursor followed by base-assisted cyclometalation of the ADC intermediate. All three emit deep blue light with good quantum efficiencies ( Φ PL = 0.13–0.48) and color profiles very close to the ideal primary blue standards for color displays. 
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