High Photothermal Activity within Neutral Nickel Dithiolene Complexes Derived from Imidazolium-Based Ionic Liquids

Kenny Mebrouk (1) , Franck Camerel (1) , Olivier Jeannin (1) , Benoît Heinrich (2) , Bertrand Donnio (2) , Marc Fourmigué (1)

1 ISCR - Institut des Sciences Chimiques de Rennes
2 IPCMS - Institut de Physique et Chimie des Matériaux de Strasbourg

A new series of nickel N,N'-dialkylimidazolidine-2,4,5-trithione complexes ([Ni(R2timdt)2]) carrying linear or branched carbon chains (R = n-C4H9, n-C8H17, n-C12H25, n-C16H33, 2-ethylhexyl, 2-butyloctyl, phytanyl) have been obtained through an original synthetic pathway starting from easily available imidazolium-based ionic liquids. The chemical structures of these nickel complexes were confirmed by NMR and high-resolution mass spectroscopies as well as by X-ray analysis performed on single crystals. The complexes strongly absorb in the near-IR (NIR) region around 1000 nm, with high extinction coefficients reaching 80 000 M(-1) cm(-1). They are able to efficiently convert NIR light into heat under laser irradiation with very high photothermal conversion efficiencies (around 30%)

Domains: Chemical Sciences

Kenny Mebrouk, Franck Camerel, Olivier Jeannin, Benoît Heinrich, Bertrand Donnio, et al.. High Photothermal Activity within Neutral Nickel Dithiolene Complexes Derived from Imidazolium-Based Ionic Liquids. Inorganic Chemistry, 2016, 55 (3), pp.1296-1303. ⟨10.1021/acs.inorgchem.5b02648⟩. ⟨hal-01263047⟩