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Design of (NHC) Copper(I) complexes bearing dipyridylamine ligands for application in luminescent materials: (NHC) Cu(I) Complexes bearing Dipyridylamine ligands - Synthesis, Structural, Photoluminescent Studies and Applications in Luminescent Materials

Abstract : We present in this communication the synthesis of new cationic tricoordinated copper complexes bearing bidentate dipyridylamine (dpa) ligands and NHC as ancillary ligands [Cu(NHC)(HDPA)][X].(1,2) These copper complexes have been fully characterized by NMR, X-ray analysis, electrochemistry, and photophysics. TD-DFT calculations were also undergoneto rationalize the assignment of the photophysical properties. Some of these copper complexes exhibit very bright blue emission with high quantum yield at solid state. A variation of the electronic properties on both NHC and dipyridylamine ligands, has been carried out and permitted to establish a structure – properties relationship, also supported by TD-DFT calculations. A photophysical study at low temperature highlighted a specific luminescence phenomenon of the complexes: Thermally Activated Delayed Flurorescence. Since emissive cationic organometallic complexes can be good candidates for LEC (Light emittingElectrochemical Cells) applications, a selection of copper complexes was achieved for the preparation of those lighting devices. Here is presented the proof of concept that our copper complexes, of general formula [Cu(NHC)(dpa)][X], can be applied for LEC devices. To the best of our knowledge, we are presenting here the first blue emitting LEC device incorporating cationic copper complexes.
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https://hal-normandie-univ.archives-ouvertes.fr/hal-02434048
Contributor : Sylvain Gaillard <>
Submitted on : Monday, January 13, 2020 - 10:55:45 AM
Last modification on : Thursday, July 30, 2020 - 3:12:41 AM
Long-term archiving on: : Tuesday, April 14, 2020 - 2:29:48 PM

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  • HAL Id : hal-02434048, version 1

Citation

Margaux Elie, Fabien Sguerra, Florent Di Meo, Michael D. Weber, Ronan Marion, et al.. Design of (NHC) Copper(I) complexes bearing dipyridylamine ligands for application in luminescent materials: (NHC) Cu(I) Complexes bearing Dipyridylamine ligands - Synthesis, Structural, Photoluminescent Studies and Applications in Luminescent Materials. 13th Anglo-Norman Organic Chemistry Colloquium (ANORCQ XIII), Apr 2016, Rouen, France. ⟨hal-02434048⟩

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