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Multifunctional Helicene-Based Ytterbium Coordination Polymer Displaying Circularly Polarized Luminescence,Slow Magnetic Relaxation and Room Temperature Magneto-Chiral Dichroism** |
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| Authors: | Dr Kais Dhbaibi Maxime Grasser Dr Haiet Douib Dr Vincent Dorcet Prof Olivier Cador Dr Nicolas Vanthuyne Dr François Riobé Dr Olivier Maury Prof Stéphan Guy Dr Amina Bensalah-Ledoux Dr Bruno Baguenard Prof Geert L J A Rikken Prof Cyrille Train Dr Boris Le Guennic Dr Matteo Atzori Dr Fabrice Pointillart Dr Jeanne Crassous |
| Institution: | 1. Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226, 35000 Rennes, France;2. Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226, 35000 Rennes, France
These authors contributed equally to this work.;3. Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226, 35000 Rennes, France Laboratoire des Matériaux Organiques et Hétérochimie (LMOH), Département des sciences de la matière, Université Larbi Tébessi de Tébessa, Route de Constantine, 12002 Tébessa, Algérie;4. Aix Marseille University, CNRS, Centrale Marseille, iSm2, Marseille, France;5. ENSL, CNRS, Laboratoire de Chimie UMR 5182, 46 allée d'Italie, 69364 Lyon, France;6. Univ Lyon, Université Claude Bernard Lyon 1, CNRS, UMR 5306, Institut Lumière Matière, 69622 Lyon, France;7. Laboratoire National des Champs Magnétiques Intenses, CNRS, Univ. Grenoble Alpes, INSA Toulouse, Univ. Toulouse Paul Sabatier, EMFL, 38042 Grenoble, France |
| Abstract: | The combination of physical properties sensitive to molecular chirality in a single system allows the observation of fascinating phenomena such as magneto-chiral dichroism (MChD) and circularly polarized luminescence (CPL) having potential applications for optical data readout and display technology. Homochiral monodimensional coordination polymers of YbIII were designed from a 2,15-bis-ethynyl-hexahelicenic scaffold decorated with two terminal 4-pyridyl units. Thanks to the coordination of the chiral organic chromophore to Yb(hfac)3 units (hfac?=1,1,1,5,5,5-hexafluoroacetylaconate), efficient NIR-CPL activity is observed. Moreover, the specific crystal field around the YbIII induces a strong magnetic anisotropy which leads to a single-molecule magnet (SMM) behaviour and a remarkable room temperature MChD. The MChD-structural correlation is supported by computational investigations. |
| Keywords: | Circularly Polarized Luminescence Helicene Magnetochiral Effect Single-Molecule Magnet Ytterbium |