AI Article Synopsis
- The study introduces new rare-earth-containing metallomesogens created with specific ligands that don't form mesophases on their own but do when complexed with rare-earth ions.
- The complexes exhibit different liquid crystalline phases, specifically nematic and smectic A phases, indicating structured arrangements.
- Characterization methods highlight that these liquid crystals show significant magnetic properties, allowing them to be aligned with a low magnetic field.
Article Abstract
We report rare-earth-containing metallomesogens with newly synthesized ligands represented by the β-diketone 1-(4-(4-propylcyclohexyl)phenyl)octane-1,3-dione (CPD) and the Lewis base 5,5'-bis(heptadecyl)-2,2'-bipyridine (bpy). The stoichiometry of the complexes is [Ln(CPD)bpy], where Ln is a trivalent rare-earth ion (La, Sm, Eu, Gd, Tb, Dy, Ho, Tm, and Yb). Although the ligands themselves do not form any mesophase, the respective metal complexes produce nematic and smectic A phases. The mesogenic rare-earth complexes were characterized by NMR, MS, POM, DSC, X-ray diffraction, magnetic susceptibility measurements, and dielectric spectroscopy. The metal complexes display a remarkably large magnetic anisotropy in the mesophase. These nematic liquid crystals can, therefore, be easily aligned by an external low-threshold magnetic field.
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| http://dx.doi.org/10.1021/acs.inorgchem.0c02500 | DOI Listing |
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