羧酸根桥连稀土一维链配合物的制备及磁性能研究

Synthesis and Magnetic Properties of Two One-dimensional Lanthanide Complexes Bridged by Carboxylate Ions

以4-氨基苯甲酸(HPAA)和Ln(NO_3)_3·6H_2O(Ln=Tb,Ho)为原料,经溶剂热反应合成了两个新型的配合物[Ln_2(PAA)_6]_n(Ln=Tb(1),Ho(2))。并利用X-射线单晶衍射、红外光谱(FT-IR)、热重分析(TG-DTA)和SQUID磁性测量仪等实验手段对配合物进行了表征。结果表明,配合物1-2为完全同构化合物,由羧酸根桥连Ln_2(PAA)_6单元形成一维链结构。磁性研究表明配合物1表现出慢磁驰豫行为。

Two new carboxylate-bridged 1D chain complexes,e. g. [Ln2（ PAA）6]n（（ PAA-= 4-aminobenzoic acid anion,Ln = Tb（ 1）,Ho（ 2））,have been synthesized under solvothermal conditions and characterized by single crystal X-ray crystallography analysis, FT-IR,TG-DTA and elemental analysis. Results show that both complexes are isostructural 1D chains and bridged by carboxylate groups. Magnetic susceptibility of polycrystalline samples of complex 1 were carried out ousing a SQUID magnetometer. The magnetic studies indicate that complex 1 exhibits slow magnetic relaxation behavior.