Ionically Self-Assembled Clustomesogen with Switchable Magnetic/Luminescence Properties Containing [Re6Se8(CN)6]n- (n = 3, 4) Anionic Clusters

Yann Molard (1) , Alexandra Ledneva (1, 2) , Maria Amela-Cortes (1) , Viorel Cîrcu (3) , Nikolai.G. Naumov (4) , Cristelle Meriadec (5) , Franck Artzner (5) , Stéphane Cordier (1)

1 ISCR - Institut des Sciences Chimiques de Rennes
2 Nikolaev Institute of Inorganic Chemistry
3 Inorganic Chemistry Department
4 Nikolaev Institute of Inorganic Chemistry
5 IPR - Institut de Physique de Rennes

Octahedral anionic rhenium clusters are obtained by high-temperature solid-state chemistry synthesis as single crystals or powders within which their charge is counter balanced by alkali cations. The ceramic-like behavior of the solid-state Re6 based inorganic compound limits strongly their use in functional devices. We present herein a facile route to introduce these anionic clusters in a self-organized hybrid organic-inorganic material. By replacing alkali countercations by mesogenic organic ones, polarized optical microscopy (POM), DSC, X-ray, magnetic, fluorescence, and cyclic voltammetry techniques confirm that a lyotropic and thermotropic liquid crystal material, able to switch reversibly from a bright red NIR luminescent form to a magnetic green-colored one, is obtained.

Mots clés: cluster compounds; hybrid materials; luminescence; liquid crystals

Domaines: Biophysique [physics.bio-ph]

Yann Molard, Alexandra Ledneva, Maria Amela-Cortes, Viorel Cîrcu, Nikolai.G. Naumov, et al.. Ionically Self-Assembled Clustomesogen with Switchable Magnetic/Luminescence Properties Containing [Re6Se8(CN)6]n- (n = 3, 4) Anionic Clusters. Chemistry of Materials, 2011, 23 (23), pp.5122-5130. ⟨10.1021/cm201589d⟩. ⟨hal-00694104⟩