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Tuning State Energies for Narrow Blue Emission in Tetradentate Pyridyl-Carbazole Platinum Complexes

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Download Hi-Res ImageDownload to MS-PowerPointCite This:Inorg. Chem. 2019, 58, 18, 12348-12357
    Article

    Tuning State Energies for Narrow Blue Emission in Tetradentate Pyridyl-Carbazole Platinum Complexes
    Click to copy article linkArticle link copied!

    • Tyler Fleetham
      Tyler Fleetham
      Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
      More by Tyler Fleetham
    • Jessica H. Golden
      Jessica H. Golden
      Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
      More by Jessica H. Golden
    • Muazzam Idris
      Muazzam Idris
      Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
      More by Muazzam Idris
    • Han-Ming Hau
      Han-Ming Hau
      Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
      More by Han-Ming Hau
    • Daniel Sylvinson Muthiah Ravinson
      Daniel Sylvinson Muthiah Ravinson
      Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
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    • Peter I. Djurovich
      Peter I. Djurovich
      Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
      More by Peter I. Djurovich
      Orcidhttp://orcid.org/0000-0001-6716-389X
    • Mark E. Thompson*
      Mark E. Thompson
      Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
      *E-mail: [email protected]
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      Orcidhttp://orcid.org/0000-0002-7764-4096
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    Inorganic Chemistry

    Cite this: Inorg. Chem. 2019, 58, 18, 12348–12357
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    https://doi.org/10.1021/acs.inorgchem.9b01888
    Published September 5, 2019
    Copyright © 2019 American Chemical Society
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    Abstract

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    Narrow, deep blue emitters are highly desired in the field of organic light emitting diodes for high quality full color display and solid-state lighting applications. PtNON is reported as a deep blue emitting phosphor but is limited by its broad emission spectrum, making it unsuitable for high quality full color display applications. In this work, we report a strategy to fine-tune the color and the emission line shape of PtNON derivatives by incorporating electron donating (methyl or methoxy) or withdrawing (trifluoromethyl) substituent groups at the positions para to the nitrogen of the pyridines in PtNON. These substitutions resulted in destabilization or stabilization of the charge transfer state (CT) relative to the ligand centered (LC) state, resulting in complexes with narrow or broad emission spectra in various media. PtNON-OMe emits predominantly from the LC state, giving a narrow emission spectrum with fwhm = 48 nm in any media. PtNON-Me emits largely from the LC state in nonpolar media (fwhm = 54 nm) and predominantly from the CT state in polar media (fwhm = 83 nm). Last, PtNON-CF3 emits solely from the CT state in any media, giving it a broad emission spectrum (fwhm = 98 nm). The photoluminescence quantum yields of PtNON-OMe, PtNON-Me, and PtNON-CF3 in 1% doped PMMA films are 89, 95 and 20% with emission lifetimes of 27.1, 7.17, and 0.96 μs, respectively.

    Copyright © 2019 American Chemical Society

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    Supporting Information

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    The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acs.inorgchem.9b01888.

    • Photophysical properties of PtNON-Me in different host materials; OLED device fabrication procedure and device characteristics; 1H and 13C NMR of 2c, 3c, 4b, 4c, 4d, 5b, 5c, and 5d (PDF)

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    Cited By

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    This article is cited by 26 publications.

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    Inorganic Chemistry

    Cite this: Inorg. Chem. 2019, 58, 18, 12348–12357
    Click to copy citationCitation copied!
    https://doi.org/10.1021/acs.inorgchem.9b01888
    Published September 5, 2019
    Copyright © 2019 American Chemical Society
    Request reuse permissions

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