247225-29-2Relevant articles and documents
Three Ternary Rare Earth(III) Complexes Based on 3-[(4,6-Dimethyl-2-pyrimidinyl)thio]-propanoic Acid and 1,10-Phenanthroline: Synthesis, Crystal Structure and Antioxidant Activity
Chen, Xiao,Qu, Jian-Qiang
, p. 1301 - 1306 (2015)
Three ternary rare earth [NdIII (1), SmIII (2) and YIII (3)] complexes based on 3-[(4,6-dimethyl-2-pyrimidinyl)thio]-propanoic acid (HL) and 1,10-phenanthroline (Phen) were synthesized and characterized by IR and UV/Vis spectroscopy, TGA, and single-crystal X-ray diffraction. The crystal structures showed that complexes 1-3 contain dinuclear rare earth units bridged by four propionate groups and are of general formula [REL3(Phen)]2·nH2O (for 1 and 2: n = 2; for 3: n = 0). All rare earth ions are nine-coordinate with distorted mono-capped square antiprismatic coordination polyhedra. Complex 1 crystallizes in the monoclinic system, space group P21/c with a = 16.241(7) ?, b = 16.095(7) ?, c = 19.169(6) ?, β = 121.48(2)°. Complex 2 crystallizes in the monoclinic system, space group P21/c with a = 16.187(5) ?, b = 16.045(4) ?, c = 19.001(4) ?, β = 120.956(18)°. Complex 3 crystallizes in the triclinic system, space group P1 with a = 11.390(6) ?, b = 13.636(6) ?, c = 15.958(7) ?, α = 72.310(17)°, β = 77.548(15)°, γ = 78.288(16)°. The antioxidant activity test shows that all complexes own higher antioxidant activity than free ligands.
