A new family of lanthanide terpyridine nitrate complexes: Solvothermal syntheses, crystal structures and luminescent properties of [Ln(pytpy)(NO3)2(μ-OCH3)]2
| Autor: | Huai-Ming Hu, Meng-Lin Yang, Ting Qin, Qing-Ran Wu, Lei Gou, Ganglin Xue, Zongxun Tang |
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| Rok vydání: | 2008 |
| Předmět: |
Lanthanide
Denticity Chemistry Metal ions in aqueous solution Inorganic chemistry Crystal structure Trigonal prismatic molecular geometry Inorganic Chemistry Crystallography chemistry.chemical_compound Materials Chemistry Physical and Theoretical Chemistry Terpyridine Luminescence Monoclinic crystal system |
| Zdroj: | Inorganica Chimica Acta. 361:1922-1928 |
| ISSN: | 0020-1693 |
| DOI: | 10.1016/j.ica.2007.10.009 |
| Popis: | The complexes [Ln(pytpy)(NO3)2(μ-OCH3)]2 (Ln = Eu(III), Tb(III), Dy(III), pytpy=4′-(n-pyridyl)-2,2′:6′,2″-terpyridine, n = 2, 3) were synthesized and characterized by IR, elemental analyses, UV–Vis and luminescent spectroscopy. Three complexes crystallized in monoclinic system, P21/n space group. Lanthanide ions are nine-coordinated by three nitrogen atoms from tridentate pytpy ligands, four oxygen atoms from two bidentate nitrate groups and two oxygen atoms from two methoxo groups, forming distorted tricapped trigonal prismatic geometries. The dimethoxo-bridges connect two metal ions in asymmetric fashion into dimeric structures with short Ln⋯Ln distances of 3.767(1), 3.740(1) and 3.720(1) A for Eu(III), Tb(III) and Dy(III) complexes, respectively. Photoluminescence measurement indicates that 1 and 3 emit the characteristic luminescence of Tb(III) and Eu(III) ions in the solid state, respectively. The luminescent spectrum of Eu(III) complex in solvents was also investigated. |
| Databáze: | OpenAIRE |
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