Blue light emission from cyclometallated iridium (III) cyano complexes: Syntheses, crystal structures, and photophysical properties

Sanner, Robert D.; Cherepy, Nerine J.; Young, Jr., Victor G.

doi:10.1016/j.ica.2015.10.030

Title: Blue light emission from cyclometallated iridium (III) cyano complexes: Syntheses, crystal structures, and photophysical properties

Journal Article · Mon Nov 02 04:00:00 UTC 2015 · Inorganica Chimica Acta

DOI: https://doi.org/10.1016/j.ica.2015.10.030 · OSTI ID:1251038

Sanner, Robert D. ^[1]; Cherepy, Nerine J. ^[1]; Young, Jr., Victor G. ^[2]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Univ. of Minnesota, Minneapolis, MN (United States)

In this study, we describe the synthesis and crystal structures of four iridium compounds containing the 2-(4,6-difluorophenyl)pyridyl ligand. Cleavage of dichloro-bridged iridium(III) dimers with phosphorus ligands leads to (46dfppy)2Ir(L)(Cl) where L = PPh₃ or P(OPh)₃. Treatment of the chloro compounds with cyanide forms the cyano complexes (46dfppy)₂Ir(L)(CN). All complexes exhibit a trans effect in their molecular structures due to the phosphorus ligands, with the phosphite having a greater effect than the phosphine. With L = PPh₃, blue photoluminescence with CIE coordinates (x = 0.16, y = 0.24), quantum yield of 0.66 ± 0.15 and 4.5 ± 0.5 μs decay time is measured. For L = P(OPh)₃, blue photoluminescence with CIE coordinates (x = 0.16, y = 0.21), quantum yield of 0.65 ± 0.15 and 2.9 ± 0.3 μs decay time is measured.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1251038

Report Number(s):: LLNL-JRNL--669760

Journal Information:: Inorganica Chimica Acta, Journal Name: Inorganica Chimica Acta Journal Issue: C Vol. 440; ISSN 0020-1693

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Organometallic phosphors as building blocks in sol–gel chemistry: luminescent organometallo-silica materials Ezquerro, C.; Sepúlveda, A. E.; Grau-Atienza, A. Journal of Materials Chemistry C, Vol. 5, Issue 37 https://doi.org/10.1039/c7tc02188g	journal	January 2017
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The crystal structure of bis{3,5-difluoro-2-[4-(2,4,6-trimethylphenyl)pyridin-2-yl]phenyl}(picolinato)iridium(III) and its 4- tert -butylpyridin-2-yl analogue Sanner, Robert D.; Young, Victor G. Acta Crystallographica Section E Crystallographic Communications, Vol. 74, Issue 10 https://doi.org/10.1107/s2056989018012409	journal	September 2018

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
blue phosphorescence
iridium complexes
metallorganic light emitters

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