title: Assembly of trimeric polyoxovanadate aggregates based on [MnV13O38]7- building blocks and lanthanide cations.
abstract: Three trimeric polyoxovanadate based on 1:13 anions [MnV13O38](7-) with lanthanide cations Ln(3+) (Ln = La, Ce and Nd) and pyridine-3-carboxylic acid: HK3{[Ln(H2O)4]6[MnV13O38]3(SO4)2}·3(C6H6NO2)·nH2O (Ln = La 1, Nd 3; n = 33 for 1, 20 for 3), H(2.5)K(1.5){[Ce(H2O)4]6[MnV13O38]3(SO4)2}·3(C6H6NO2)·20.5H2O (2) (C6H5NO2 = pyridine-3-carboxylic acid) have been synthesized and characterized by elemental analysis, IR spectroscopy, UV spectroscopy, TG analysis, XPRD, electrochemical analyses, magnetism and single-crystal X-ray diffraction. Compounds 1-3 are isostructural and crystallized in the hexagonal system, space group P6(3)/m. Compounds 1-3 contain an unusual trimeric polyoxoanion [{Ln2MnV13O38}3(SO4)2](7-), representing the first polyoxovanadate-based trimeric aggregate with rare earth ions. The electrochemical and electrocatalytic properties of the compounds have been investigated. Magnetic studies indicate that antiferromagnetic interactions exist in the compounds.
authors: Key Laboratory of Polyoxometalate Science of Ministry of Education, Department of Chemistry, Northeast Normal University, Changchun, Jilin 130024, P. R. China. luy968@nenu.edu.cn wangeb889@nenu.edu.cn.
authors: Ding
authors: D
authors: Liu
authors: Ying
authors: Y
authors: Lu
authors: Yang-Guang
authors: YG
authors: Li
authors: Hua-Qiao
authors: HQ
authors: Tan
authors: Wei-Lin
authors: WL
authors: Chen
authors: Zhi-Ming
authors: ZM
authors: Zhang
authors: En-Bo
authors: EB
authors: Wang