Synthesis and luminescence properties of hybrid systems based on liquid crystal terbium(ІІІ) and europium(ІІІ) complexes

Influence of Lewis Bases on the Mesogenic and Luminescent Properties of Homogeneous Films of Europium(III) Tris(β‐diketonate) Adducts

“…In contrast, the complexes with aspect ratios higher than ca. 2.3, that is, those bearing fairly anisotropic Lewis bases [namely, 5,5′‐didecyl‐2,2′‐bipyridine (Bpy 10‐10 ), 5,5′‐didodecyl‐2,2′‐bipyridine (Bpy 12‐12 ), and 5‐heptadecyl‐5′‐methyl‐2,2′‐bipyridine (Bpy 17‐1 )], are liquid‐crystalline (LC; Table , Entries 10–12), in agreement with the behavior reported previously for related lanthanidomesogens with similar or higher aspect ratios (Table , Entries 13–16) . In our case, Eu(CPDk 3‐Ph ) 3 Bpy 17‐1 melts upon heating into a smectic A (SmA) phase and on further heating into a nematic (N) phase, as can be recognized readily from the typical optical textures (Figure ).…”

“…Such occurrence of the nematic phase is a very promising feature, as it might be the objective of the long‐standing quest for lanthanide complexes of low‐viscosity, which is a key requirement for potential applications . However, this phase has been encountered in rather few compounds to date , . Complexes with Bpy 10‐10 and Bpy 12‐12 ligands (Table , Entries 10 and 11) show transitory nematic and smectic A mesophases, respectively, on fast cooling (Figure ).…”

“…Syntheses: 1‐Phenyl‐3‐[4‐(4‐propylcyclohexyl)phenyl]propane‐1,3‐dione, 5,5′‐didecyl‐2,2′‐bipyridine, 5,5′‐didodecyl‐2,2′‐bipyridine, and 5‐heptadecyl‐5′‐methyl‐2,2′‐bipyridine were prepared according to modified literature procedures , , , . The complexes were synthesized according to literature procedures , , , …”

Optical and structural characteristics of PMMA films doped with a new anisometric EuIII complex

“…The method described by Knyazev, Karyakin et al (2015) was used to synthesize 1-[4-(4-propylcyclohexyl)phenyl]octane-1,3-dione (CPDK 3-5 ).…”

“…The europium(III) complex ( Fig. 1) was synthesized according to the method described by Knyazev, Karyakin et al, 2015;Knyazev, Karyakin, Krupin et al, 2017;Knyazev et al, 2013). The composition and the structure of this complex are confirmed by IR spectroscopy data as well as by elemental and X-ray fluorescence analysis.…”