Brito-Santos Gabriela, Gil-Hernández Beatriz, Martín Inocencio R, Guerrero-Lemus Ricardo, Sanchiz Joaquín
Departamento de Química, Facultad de Ciencias, Universidad de La Laguna Tenerife 38206 Spain
Instituto Universitario de Materiales y Nanotecnología, Universidad de La Laguna Tenerife 38206 Spain.
RSC Adv. 2020 Jul 24;10(46):27815-27823. doi: 10.1039/d0ra05539e. eCollection 2020 Jul 21.
Five new complexes namely, [Er(bta)(me-phen)] (1), [Yb(bta)(me-phen)] (2), [Gd(bta)3(me-phen)] (3), [Yb(bta)(pyz-phen)] (4), and [Er(tta)(pyz-phen)] (5) have been prepared with the fluorinated β-diketone ligands Hbta and Htta (Hbta = benzoyltrifluoroacetone and Htta = 2-thenoyltrifluoroacetone) combined with the azacyclo phenanthroline-derivatives, 5-methyl-1,10-phenanthroline (me-phen) and pyrazino[2,3-][1,10]phenanthroline (pyz-phen). The crystal structures of 2, 4 and 5 have been solved by single-crystal X-ray diffraction. PXRD patterns show that 1-3 are isostructural. All the compounds exhibit a molecular structure with the metal atom in an eight-coordination geometry. The photophysical processes involved in the photoluminescence of the complexes are investigated; as a result, the radiative lifetimes ( ), the 4f-4f emission quantum efficiencies ( ) and the energy-levels diagram are calculated.
已制备出五种新的配合物，即[铒（苯甲酰三氟丙酮）（5-甲基-1,10-菲啰啉）]（1）、[镱（苯甲酰三氟丙酮）（5-甲基-1,10-菲啰啉）]（2）、[钆（苯甲酰三氟丙酮）₃（5-甲基-1,10-菲啰啉）]（3）、[镱（苯甲酰三氟丙酮）（吡嗪并[2,3-][1,10]菲啰啉）]（4）和[铒（噻吩甲酰三氟丙酮）（吡嗪并[2,3-][1,10]菲啰啉）]（5），它们是由氟化β-二酮配体苯甲酰三氟丙酮（Hbta）和噻吩甲酰三氟丙酮（Htta）与氮杂环菲衍生物5-甲基-1,10-菲啰啉（me-phen）和吡嗪并[2,3-][1,10]菲啰啉（pyz-phen）组合而成。通过单晶X射线衍射解析了2、4和5的晶体结构。粉末X射线衍射图谱表明1-3是同构的。所有化合物均呈现出金属原子处于八配位几何构型的分子结构。研究了配合物光致发光过程中涉及的光物理过程；结果计算出了辐射寿命（ ）、4f-4f发射量子效率（ ）以及能级图。
