Cyclometallated Platinum(II) Complexes Featuring an Unusual, $C\hat{}N$‐Coordinating Pyridyl‐pyridylidene Ligand and L X Coligands: Synthesis, Structures and Dual Luminescence Behavior - Sorbonne Université Access content directly
Journal Articles European Journal of Inorganic Chemistry Year : 2023

Cyclometallated Platinum(II) Complexes Featuring an Unusual, $C\hat{}N$‐Coordinating Pyridyl‐pyridylidene Ligand and L X Coligands: Synthesis, Structures and Dual Luminescence Behavior

Abstract

Thanks to an unusual protodemethylation reaction, a series of luminescent cyclometallated platinum(II) complexes can be prepared, which incorporate a rare NC-chelating, pyridylpyridylidene ligand, in combination with OO-coordinating acetylacetonate (acac) or NO-coordinating 2-picolinate (pic) or 8-hydroxyquinolate. The acac and pic complexes show unusual dual emission in a frozen glass. A series of cyclometallated platinum(II) complexes incorporating a rare, N^C-chelating, pyridyl-pyridylidene ligand are described, in which the coordination sphere is completed by two chlorides or an L X co-ligand, namely O O-coordinating acetylacetonate (acac), or N^O-coordinating 2-picolinate (pic) or 8-hydroxyquinolinate. The acac and pic complexes have been structurally characterized in the solid state by single-crystal X-ray diffraction. These two complexes display red phosphorescence in the solid state at room temperature. In a frozen glass at 77 K, all four complexes show two broad emission bands that span much of the visible spectrum, apparently from two unequilibrated excited states.
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Dates and versions

hal-04226665 , version 1 (03-10-2023)

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Julien Montagu, Geoffrey Gontard, J a Gareth Williams, Jamal Moussa. Cyclometallated Platinum(II) Complexes Featuring an Unusual, $C\hat{}N$‐Coordinating Pyridyl‐pyridylidene Ligand and L X Coligands: Synthesis, Structures and Dual Luminescence Behavior. European Journal of Inorganic Chemistry, 2023, ⟨10.1002/ejic.202300487⟩. ⟨hal-04226665⟩
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