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The photochemistry of nickel(II) complexes remains relatively unexplored despite their being isoelectronic to richly emissive Pt(II)-d8 complexes. As a consequence of being a first-row transition metal, nickel possesses intrinsically low d-d ligand-field (LF) splitting energy—challenging research efforts with thermally accessible, distorted, metal-centered excited states that effectively quench luminescence. As such, most nickel(II) complexes have been found to be non-emissive at room temperature. Informed by computational guidance, our research aims to design and synthesize nickel(II) complexes with sufficient LF splitting to achieve rich luminescence with earth-abundant and low cost nickel metal.
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McClellan, Ian Christopher, "Organonickel Triplet Emitters?" (2020). Senior Projects Fall 2020. 47.
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