多金属氧酸盐
化学
杂原子
结晶学
发光
镧系元素
分子
缺函数
立体化学
离子
有机化学
催化作用
戒指(化学)
物理
数学
光电子学
纯数学
作者
Zeng-Xi Yang,Xue-Wei Liang,Dunmin Lin,Qiaoji Zheng,Yujing Huo
出处
期刊:Inorganic Chemistry
[American Chemical Society]
日期:2023-01-19
卷期号:62 (4): 1466-1475
被引量:1
标识
DOI:10.1021/acs.inorgchem.2c03561
摘要
Two series of lanthanoid (Ln)-containing polyoxometalates (POMs) {[Ln6(ampH)4(H2O)24-n(ampH2)n(PW11O39)2]·21H2O (Ln = Tb, n = 0 (1), Ln = Er, n = 1 (2)) and K2[Ln6(ampH)4(H2O)22(SiW11O39)2]·23H2O (Ln = Tb (3), Er (4)) (ampH2 = (aminomethyl) phosphonic acid)} have been synthesized with tri-lacunary Keggin-type POMs containing different types of heteroatoms. Compounds 1 and 2 display neutral organic-inorganic hybrid POM molecules containing {Ln6(ampH)4} ({Ln6}) cores sandwiched by two {PW11O39} units. By changing the heteroatoms from PV to SiIV, the extended 2D networks of 3 and 4 were successfully isolated where the adjacent {Ln6} clusters were connected by {SiW11O39} moieties. Luminescence performances and magnetic properties of 1-4 have been systematically surveyed. The solid-state fluorescence spectra of 1-4 display characteristic emissions of Ln components resulting from the 4f-4f transitions, and energy transfer from the POM segments to Ln3+ centers in 1 and 3 has been observed based on the lifetime decay behaviors. Furthermore, all compounds can be utilized as electrocatalysts toward reduction of nitrite with high stability.
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