The largest Se-4f cluster incorporated polyoxometalate with high Lewis acid–base catalytic activity

Abstract

A 4p-4f cluster incorporated polyoxometalate (POM), namely, H18{[(H4pic)4Eu10Se13O28(H2O)12](α-GeW9O34)4·40H2O (1-Eu, H4pic = Isonicotinic acid), has been first synthesized and characterized. 1-Eu features an interesting four-shell structure, representing the largest Se-4f cluster...

Recent advances in polyoxometalate-based lanthanide–oxo clusters

“…In addition to the above three types of POMs-based LnOCs, there are a few other kinds of clusters have been reported. For example, the 4p-4f cluster {[(H4pic)4Eu10Se13O28(H2O)12](α-GeW9O34)4} 18-(H4pic= isonicotinic acid) shows an interesting multishell layer structure [Se@Eu4@Eu6@{Se3(a-GeW9O34)}4] [154]. The 5p-4f clusters {H17(H2en)3[Sb III 9Sb V Ln3O14(H2O)3][(SbW9O33)3(PW9O34)]} (Ln= Ce, Sm, Eu, Gd, Tb, Dy ) and {H13(HIm)4K2Na4(H2O)9[Sb III 9Sb V Ln3O14(H2O)3][(SbW9O33)3( PW9O34)]} (Ln= Sm, Eu, Gd, Tb, Dy) protected by mixed trilacunary POMs [SbW9] and [PW9] have also been reported [155].…”

“…POMs themselves have applications in the fields of electronics, electrochemistry, catalysis, biology, nanomaterials, and surface science. The POMs-based LnOCs have the advantages of lanthanide ions in optical and magnetic and have certain applications in catalytic, proton conduction, biomedicine, electrochemistry, and other related fields [52,56,58,76,88,154,158]. In this review, we focus on the current status of the property of POMs-based LnOCs in single-molecule magnet and proton conductivity.…”

Two Tetra-Nuclear Ln-Substituted Prazine Dicarboxylic Acid-Functionalized Selenotungstates with Catalytic Oxidation of Thioether Properties

“…For example, they reported the 2-picolinic acid-functionalized Ce-insert SeTs N a O (H 4 pic= isonicotinic acid), which are the largest seleniumincorporated Se-4f cluster POMs presently reported, concurrent with the high Lewis acid−based catalytic activity was investigated. 38 So far, it is still an innovative and challenging research issue to fabricate and synthesize a high-nuclear, magnificent SeTs architecture.…”

Efficient Oxidative Desulfurization by Calixarene-Supported “Pineapple-Like” Polyoxometalates

“…Polyoxometalates (POMs), owning diverse structural topologies and superior redox properties, have significant applications in the field of catalysis. − However, single POMs greatly limit their practical application in ODS due to the difficulties in the recovery of the catalysts. Stable POM-based metal–organic materials − consisting of POMs, metal ions, and organic ligands can overcome these disadvantages as highly efficient and green catalysts applied in ODS, which are gradually becoming the focus of attention in the world. − …”