Unconventional access to a solvatochromic nickel (II) dye featuring a coordination-induced spin crossover behavior

Zhongrui Chen (1) , Khrouz Lhoussain (2) , Christophe Bucher (2) , Denis Jacquemin (3) , Dominique Luneau (4) , Olivier Siri (1)

1 CINaM - Centre Interdisciplinaire de Nanoscience de Marseille
2 LC - Laboratoire de Chimie - UMR5182
3 CEISAM - Chimie Et Interdisciplinarité : Synthèse, Analyse, Modélisation
4 LMI - Laboratoire des Multimatériaux et Interfaces

We report the synthesis of a square-planar nickel complex in which the metal center is located in a NOON environment. Promoting its axial ligation triggers a spin state switching process which is accompanied by a change of the absorption properties depending on the solvent. Indeed, a strong solvatochromic shifts could be observed in the presence of DMSO or pyridine, highlighting the key interplay between the donor strength of the solvent and the optical properties of the complex. The optical and magnetic properties of this compound in coordinating media have been carefully investigated through combined experimental/theoretical approaches.

Mots clés: Ni complex; solvatochromism; magnetism; quinone

Domaines: Chimie; Chimie de coordination

Zhongrui Chen, Khrouz Lhoussain, Christophe Bucher, Denis Jacquemin, Dominique Luneau, et al.. Unconventional access to a solvatochromic nickel (II) dye featuring a coordination-induced spin crossover behavior. Dyes and Pigments, 2020, 183, pp.108645. ⟨10.1016/j.dyepig.2020.108645⟩. ⟨hal-03097013⟩