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A {Ti6W4}-Cluster-Substituted Polyoxotungstate: Synthesis, Structure, and Catalytic Oxidation Properties
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2021-09-17 , DOI: 10.1021/acs.inorgchem.1c01643
Hai-Lou Li 1 , Chen Lian 1 , Guo-Yu Yang 1
Affiliation  

A novel Ti–W–O-cluster-substituted tungstoantimonate (TA), [H2N(CH3)2]3Na4H9[{Ti6W4O18(OH)(H2O)3}(B-α-SbW9O33)3]·20H2O (1), has been made by hydrothermal reactions of trivacant [B-α-SbW9O33]9– units, Ti4+ cations, and WO42– anions in the presence of [H2N(CH3)2]·Cl and structurally characterized. Intriguingly, the polyoxoanion of 1 is constructed from three [B-α-SbW9O33]9– units and a previously unobserved decanuclear heterometallic Ti–W–O cluster [Ti6W4O18(OH)(H2O)3]11+ ({Ti6W4}) that is comprised of an octahedral [Ti6WO6(H2O)3]18+ cluster and an edge-sharing [W3O12(OH)]7– fragment via six W–O–Ti/W linkers. Furthermore, studies on the catalytic oxidation properties reveal that 1 possesses good catalytic activity toward the oxidation reactions of various sulfides and cyclooctene based on the environmentally friendly oxidant H2O2.

中文翻译:

{Ti6W4}-簇取代的聚氧钨酸盐:合成、结构和催化氧化性能

一种新型的 Ti-W-O-簇取代钨锑酸盐 (TA), [H 2 N(CH 3 ) 2 ] 3 Na 4 H 9 [{Ti 6 W 4 O 18 (OH)(H 2 O) 3 }( B-α-SbW 9 O 33 ) 3 ]·20H 2 O ( 1 ),由三空位[B-α-SbW 9 O 33 ] 9–单元、Ti 4+阳离子和WO 4 2 的水热反应制成在 [H 2 N(CH3 ) 2 ]·Cl 和结构表征。有趣的是,1的多氧阴离子由三个 [B-α-SbW 9 O 33 ] 9-单元和一个以前未观察到的十核异金属 Ti-W-O 簇 [Ti 6 W 4 O 18 (OH)(H 2 O) 构成3 ] 11+ ({Ti 6 W 4 }) 由八面体 [Ti 6 WO 6 (H 2 O) 3 ] 18+簇和边共享 [W 3 O 12(OH)] 7–通过六个 W–O–Ti/W 连接器片段化。此外,对催化氧化性能的研究表明,1对基于环境友好型氧化剂 H 2 O 2的各种硫化物和环辛烯的氧化反应具有良好的催化活性。
更新日期:2021-10-04
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