SYNTHESIS, STRUCTURE, AND PHOTOLUMINESCENT PROPERTIES OF LANTHANIDE(III) COMPLEXES WITH A LIGAND BASED ON 1,10-PHENANTHROLINE AND BORNEOL
| Autor: | Yu. A. Bryleva, M. I. Rakhmanova, L. A. Glinskaya, D. A. Piryazev, A. V. Tkachev, A. M. Agafontsev |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Lanthanide
Denticity Ligand Phenanthroline Crystal structure 010402 general chemistry 010403 inorganic & nuclear chemistry 01 natural sciences 0104 chemical sciences Inorganic Chemistry Crystallography chemistry.chemical_compound chemistry Materials Chemistry Physical and Theoretical Chemistry Isostructural Luminescence Single crystal |
| Zdroj: | Journal of Structural Chemistry. 61:1810-1822 |
| ISSN: | 1573-8779 0022-4766 |
| DOI: | 10.1134/s0022476620110141 |
| Popis: | Chiral complexes [Ln((–)-L)2(NO3)3] (Ln = Sm (1), Eu (2), Tb (3)) with an optically active ligand (–)-L containing 1,10-phenanthroline and (–)-borneol moieties and also [Ln((±)-L)2(NO3)3]·1.5MeCN (Ln = Sm (4), Eu (5), Tb (6)) compounds with a racemic ligand (±)-L based on 1,10-phenanthroline and (+)-, (–)-borneol are synthesized. According to single crystal X-ray diffraction data, mononuclear complexes 1-3 are isostructural and crystallize in the non-centrosymmetric space group P43212. The crystal structures of isostructural complexes 4-6 crystallizing in the centrosymmetric space group C2/c contains (+)- and (–)-enantiomeric molecules of the mononuclear complex and MeCN molecules. In complexes 1-6, the (–)-L, (±)-L, and $$\text{NO}_{3}^{-}$$ ligands perform the bidentate chelate function (N4O6 coordination polyhedron of the Ln atom). Complexes 2 and 3 have high quantum yields (φ = 52% and 41%) and long-life luminescence (τ = 1.4 ms and 1.2 ms) in the solid state at 300 K. The luminescence quantum yields of chiral complexes 1-3 are found to several times exceed the quantum yields of racemic complexes 4-6. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|