Stéphane Jobic (DR), Martine Bujoli-Doeuff (MC), Mayte Caldes (CR), Philippe Deniard (DR), Camille Latouche (MCF).
A pigment absorbs light in the visible range (400 nm <λ <800 nm), a UV absorber beyond (λ <400 nm). Both are the seat of electronic transitions which, depending on their positioning in energy and their intensity, will give rise to colored materials with varying degrees of coloring power, their colorimetric characteristics being obviously strongly affected by their granulometry, morphology and Surrounding environment.
In addition to the synthesis of new materials, which is the first priority of our research activity, determining the nature of these transitions is essential in order to be able to model them and thus to reasonably synthesize the material with the desired properties. To date, we are always looking for new pigments for the replacement of materials based on heavy elements (e.g. lead, mercury) or proven toxicity (e.g., antimony, arsenic). In this context, the synthesis of inorganic materials having a red coloring similar to Ferrari red is a Grail.