Four tartaric acid-bridged tetra-europium(III)-containing antimonotungstate with catalytic oxidation of thioethers/alcohols

IF 10.3 4区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR

结构化学 Pub Date : 2025-07-01 DOI:10.1016/j.cjsc.2025.100603

Yuanping Jiang , Haoqi Liu , Jiawei Zhang , Luying Jiao, Xiaoling Lin, Fuhua Zhang, Guoping Yang

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Abstract

A novel tetra-europium(III)-containing antimonotungstate, Na_8.2[H₂N(CH₃)₂]₉[Na_10.8(tar)₄(H₂O)₂₀(Eu₂Sb₂W₂₁O₇₂)₂]·44.5H₂O (EuSbW, H₄tar = dl-tartaric acid), has been synthesized and characterized. The dimeric polyoxoanion of EuSbW consists of two Dawson-like {Eu₂Sb₂W₂₁} units bridged by four dl-tartaric acid ligands. The adjacent carboxyl and hydroxy groups in each tartaric acid simultaneously chelate with W and Eu atoms from different {Eu₂Sb₂W₂₁} units, thereby forming the dimeric structure. EuSbW represents an extremely rare polyoxometalate where four tartaric acid ligands function as connectors to bridge two {Eu₂Sb₂W₂₁} units. Additionally, EuSbW exhibits excellent catalytic activity and reusability in the oxidation of thioethers and alcohols, achieving 100% conversion and > 99% selectivity for various thioethers, and 85–100% conversion with 90–99% selectivity for diverse alcohols under mild conditions.

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四酒石酸桥接四铕（III）含反单钨酸盐与硫醚/醇的催化氧化

合成了一种新型的含四铕（III）反单钨酸盐Na8.2[H2N(CH3)2]9[Na10.8(tar)4(H2O)20(Eu2Sb2W21O72)2]·44.5H2O （EuSbW, H4tar = dl-酒石酸）。EuSbW的二聚多氧阴离子由四个dl-酒石酸配体桥接的两个Dawson-like单元组成。每个酒石酸中相邻的羧基和羟基同时与来自不同{Eu2Sb2W21}单元的W和Eu原子螯合，从而形成二聚体结构。EuSbW是一种极其罕见的多金属氧酸盐，其中四个酒石酸配体作为连接两个{Eu2Sb2W21}单元的连接器。此外，EuSbW在硫醚和醇的氧化中表现出优异的催化活性和可重复使用性，达到100%的转化率和>；对各种硫醚的选择性为99%，在温和条件下对各种醇的选择性为90-99%，转化率为85-100%。

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来源期刊

结构化学化学-晶体学

CiteScore

4.70

自引率

22.70%

发文量

5334

审稿时长

13 days

期刊介绍： Chinese Journal of Structural Chemistry “JIEGOU HUAXUE ”, an academic journal consisting of reviews, articles, communications and notes, provides a forum for the reporting and discussion of current novel research achievements in the fields of structural chemistry, crystallography, spectroscopy, quantum chemistry, pharmaceutical chemistry, biochemistry, material science, etc. Structural Chemistry has been indexed by SCI, CA, and some other prestigious publications.