Abstract: The rare earth ions (RE³⁺:Nd³⁺,Sm³⁺)were loaded into the HMS by the in situ incorporation technique in which RE(NO₃)₃ was used as RE³⁺ precursor.The EPR spectra of synthesised samples were beeline.The distribution of zero region split parameter arose from substituting silicon atomic with rare earth.The EPR spectra of RE-HMS(RE:Nd,Sm) calcined nanoscale samples showed one isotropic line centered at g_iso=2.187,2.163，with peak to peak line width of about 0.03 T and 0.03 T,respectively.The mesoporous solid size of RE-HMS (RE:Nd,Sm) was 31 nm in Nd-HMS and 21 nm in Sm-HMS.The pore size of mesoporous materials RE-HMS (RE:Nd,Sm) from adsorption isotherms was 2.27 nm,2.18 nm,respectively.

摘要： 以RE（NO₃）₃为先驱物，采用原位掺入技术把稀土离子组装进了稀土纳米in-RE-HMS（RE：Nd,Sm）六方介孔固体中.未焙烧in-RE-HMS样品的EPR谱为直线，没有顺磁特性，然而焙烧后的介孔固体却显示一个各向同心线中心.稀土离子取代Si原子之后，产生了零场分裂常数的分布.纳米in-RE-HMS（RE：Nd，Sm）介孔固体的g_iso值依次为 2.187、2.163,峰到峰的线宽依次为0.03 T、0.03 T.纳米in-RE-HMS（RE：Nd，Sm）介孔固体的尺寸依次为31 nm、21 nm.平均孔径依次为2.27 nm和2.18 nm.