Organic light emitting diodes (OLEDs) are prevalent in artificial lighting technology and constitute an area where NHC pincer complexes have been utilized. To date, most organometallic light emitters (the key component in OLEDs) must be handled and tested in an inert atmosphere or under vacuum, dramatically increasing production costs. Thus, air and water stable blue emitters are in high demand. Current organometallic light emitters include many expensive Pt and Ir examples. Efficient Pd light emitters would pose a less expensive option. A series of CCC-NHC pincer Pd(II)-X/L complexes, where X = Cl, Br, I, O2CCH3, O2CCF3, or OPh or L = MeCN, acetone, or CO have been synthesized and characterized by NMR spectroscopy and X-ray crystallography. Solid-state photophysical data of these complexes indicate that the emission wavelength can be tuned via alteration of the X/L ligand. Most importantly, this study shows select complexes as air- and water- stable blue emitters with quantum yield of up to 72%.

Palladium N-heterocyclic carbene based CCC-NHC pincer complexes: Air and water stable organometallic emitters

255th National Meeting (2018)

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