Two temperature-dependent 2D heterometallic Cd(Ⅱ)-Dy(Ⅲ)coordination polymers exhibiting slow magnetic relaxation and luminescence properties  

作　　者：Zhongyi Li Jiahui Bu Ran Zhang Chi Zhang Dongqing Wu Bin Zhai 

机构地区：[1]College of Chemistry and Chemical Engineering,Shangqiu Normal University,Shangqiu 476000,China

出　　处：《Journal of Rare Earths》2023年第4期613-620,共8页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(21901152);Natural Science Foundation of Henan Province(222300420509)。

摘　　要：Two unique two-dimensional(2D)Cd(Ⅱ)-Dy(Ⅲ)heterometallic coordination polymers,{[DyCd(HPMA)(PMA)_(2)(H_(2)O)_(4)]·2H_(2)O}_n(1)and[DyCd(PAA)(PMA)_(2)(H_(2)O)_(3)]_(n)(2,PAA^(-)=phenylacetate),were prepared successfully based on the phenylmalonic acid(H_(2)PMA).The construction of two polymers is sensitive to the reaction temperature and can be synthesized directionally at room temperature and 90℃,respectively.Complexes 1 and 2 display 2D layer structures that include dinuclear[Dy_(2)]cluster node and Dy(Ⅲ)-based 1D zigzag chain motif severally.The Dy(Ⅲ)-based units in two structures both are spaced well with the adjacent ones by the diamagnetic Cd(Ⅱ)-based moieties.The magnetic studies reveal that 1 and 2both display slow magnetic relaxation with temperature-dependent relaxation peaks producing an effective energy barrier(Δτ)of 74.5 and 32.1 K,separately.Furthermore,the solid-state photophysical properties of 1 and 2 show strong characteristic luminescent emissions of Dy(Ⅲ)ion in the visible region.

关 键 词：Heterometallic polymers Cd(Ⅱ)-Dy(Ⅲ)ions Slow magnetic relaxation LUMINESCENCE Bifunctional material Rare earths 

分 类 号：TB34[一般工业技术—材料科学与工程] O641.4[理学—物理化学]