Self-assembly of Keggin-type U(vi)-containing tungstophosphates with a sandwich structure: an efficient catalyst for the synthesis of sulfonyl pyrazoles

Abstract

Two Keggin-type U(vi)-containing tungstophosphates with sandwich structure were synthesized and characterized. Compound 1 presents excellent catalytic activity towards the condensation cyclization of sulfonyl hydrazines with 1,3-diketones to synthesize sulfonyl pyrazoles.

Fast degradation of phenol over porphyrin-polyoxometalate composite photocatalysts under visible light

“…The results in Fig. 14(b) show that the curve first rose significantly and eventually flattened at 30 °C, and the removal rate of the substrates reached 99.1% when catalyzed by FeTCPP-PW 12 (1:6) within 60 min. The phenol removal rate was approximately 100% at a temperature of 40 °C, with phenol almost completely degraded.…”

“…Polyoxometalates (POMs), also known as polyacids, are nanoscale metal-oxygen cluster compounds formed by the high oxidation state (such as V, Mo, and W) of pretransition metal ions and oxygen [9]. POM-functionalized materials have broad application prospects in the fields of advanced technologies such as medicine, magnetic materials, environmental protection, catalysis, energy conversion, and energy storage materials [10][11][12][13]. POMs have unique structures and properties, including acid-base properties and oxidation reducibility [14].…”

A High‐Nuclear Isopolymolybdate Cluster Assembled with an Anionic [{Mo24O48(OMe)32}]8−and Two Charge‐Neutral [{Mo24O52(OMe)28}] Cages

“…Polyoxometalates (POMs) are metal‐oxygen clustered compounds consisting of metal elements like Mo, W, V, Nb, Ta, etc [1–3] . As yet, polyoxomolybdates (POMos), one of the earliest and most widely explored POMs possessing large structure diversity, exhibit great potentials in many fields including but not limited to catalysis, biomedicine, energy harvesting, magnetism, etc [4–14] . Among them, isopolymolybdates account for a significant proportion of the family of POMos.…”

“…[1][2][3] As yet, polyoxomolybdates (POMos), one of the earliest and most widely explored POMs possessing large structure diversity, exhibit great potentials in many fields including but not limited to catalysis, biomedicine, energy harvesting, magnetism, etc. [4][5][6][7][8][9][10][11][12][13][14] Among them, isopolymolybdates account for a significant proportion of the family of POMos. So far, a large variety of isopolymolybdate-based complexes have been reported, ranging from simple Mo 2 to giant Mo 368 , for instance, the low-core isopolymolybdates involving {Mo 2 }, [15] {Mo 5 }, [16] {Mo 6 }, [17] {Mo 7 }, [18] {Mo 8 }, [19][20][21] {Mo 10 }, [22] and networking frameworks implemented atop of small polyanion units.…”

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

“…Therefore, 1-Eu is expected to be a good bifunctional Lewis acid–base catalyst in many catalytic reactions. 14,15 To prove this, 1-Eu was applied to synthesize pyrazoles to evaluate its Lewis acid–base catalytic properties. Pyrazoles are widely used in agricultural and pharmaceutical areas, and they are also known as classical ligands and significant kinds of heterocyclic compounds.…”