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利用微波辅助合成法,成功地合成出一系列新颖的稀土亚磷酸盐GdxTb2-x(HPO3)3(H2O)2(0≤x≤2).X-射线粉末衍射分析结果表明,它们为同构的化合物.对Gd2(HPO3)3(H2O)2进行X-射线单晶衍射分析得出,该化合物结晶于P21/c空间群,晶胞参数为a=6.9124(6),b=12.8891(12),c=12.3692(11),β=100.1520(10)°.Gd2(HPO3)3(H2O)2是由GdO7多面体,GdO8多面体和[HPO3]假四面体通过共用氧原子相互连接而成的三维骨架.Gd2(HPO3)3(H2O)2和Tb2(HPO3)3(H2O)2的荧光光谱分别显示Gd3+和Tb3+的特征发光.Gd/Tb掺杂的样品中存在Gd3+-Tb3+的能量传递,它们的发光显示Tb3+的绿光发射(5D4→7F3-6),并且5D4→7F3跃迁的强度随着Tb3+掺杂量的增大而增强,这表明Gd2(HPO3)3(H2O)2引入不同浓度的发光中心Tb3+之后可以作为绿光发光材料.磁性研究表明,Gd2(HPO3)3(H2O)2中存在极弱的反铁磁相互作用.
A series of novel rare earth phosphites GdxTb2-x (HPO3) 3 (H2O) 2 (0≤x≤2) have been successfully synthesized by microwave assisted synthesis.The results of X-ray powder diffraction show that they are isomorphism X-ray single crystal diffraction analysis of Gd2 (HPO3) 3 (H2O) 2 shows that the compound crystallizes in the P21 / c space group with unit cell parameters of a = 6.9124 (6) and b = 12.8891 ), c = 12.3692 (11), β = 100.1520 (10) °. Gd2 (HPO3) 3 (H2O) 2 is a three-dimensional structure composed of GdO7 polyhedrons, GdO8 polyhedrons and [HPO3] pseudo- tetrahedra interconnected by sharing oxygen atoms The fluorescence spectra of Gd2 (HPO3) 3 (H2O) 2 and Tb2 (HPO3) 3 (H2O) 2 show the characteristic luminescence of Gd3 + and Tb3 +, respectively. The energy transfer of Gd3 + -Tb3 + (5D4 → 7F3-6) of Tb3 +, and the intensity of the 5D4 → 7F3 transition increases with the increase of Tb3 + doping, which indicates that Gd2 (HPO3) 3 (H2O) 2 is introduced into different concentrations of The luminescent center Tb3 + can be used as a green luminescent material. Magnetic studies show that there is a very weak antiferromagnetic interaction in Gd2 (HPO3) 3 (H2O) 2.