Synthesis of Eu(III) and Tb(III) complexes with novel pyridine dicarboxamide derivatives and their luminescence properties.
A novel ligand, N2,N6-bis[2-(3-methylpyridyl)]pyridine-2,6-dicarboxamide (L2) and the corresponding Eu(III) and Tb(III) hydrochlorate complexes have been synthesized and characterized in detail based on elemental analysis, IR and NMR. The crystal and molecular structure of the complexes was determined by X-ray crystallography. The Eu(III) and Tb(III) ions were found to coordinate to the amido nitrogen atoms and pyridine nitrogen atoms. The luminescence properties of lanthanide complexes in solid state, in different solutions and in different pH value were investigated. The result shows that Tb(III) complexes exhibit more efficient luminescence than Eu(III) complexes, and the ligand (L2) is an excellent sensitizer to Tb(III) ion.
Tang
Rui-Ren
RR
School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China. trr@mail.csu.edu.cn
Gu
Guo-Liang
GL
Zhao
Qiang
Q
D005063:Europium / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D049449:Luminescence; D008163:Luminescent Measurements; D008958:Models, Molecular; D015394:Molecular Structure; D009539:Nicotinic Acids / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry*; D012997:Solvents; D013055:Spectrophotometry, Infrared; D013725:Terbium / Q000737:chemistry*
D009539:Nicotinic Acids; D011725:Pyridines; D012997:Solvents; D013725:Terbium; D005063:Europium; C023666:pyridine