Latest progress in asymmetrically functionalized Anderson-type polyoxometalates

Zhuang, Qinghe; Sun, Zeqian; Lin, Chang‐Gen; Qi, Bo; Song, Yufei

doi:10.1039/d2qi02690b

Cited by 10 publications

(6 citation statements)

References 96 publications

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“…All reagents and solvents were analytical grade. NH 2 ‐AlMo 6 was synthesized according to previous report, 34 and its 1 H NMR spectrum was shown in Figure S1. N 3 P 3 (OC 6 H 3 OCH 3 COH) 6 was obtained according to the literature, 35 and its 1 H NMR, and 31 P NMR results were exhibited in Figure S1.…”

Section: Methodsmentioning

confidence: 99%

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Synthesis of metal‐containing Schiff based cyclomatrix polyphosphazene microspheres based on polyoxometalates and application in flame retardance for epoxy resin

Peng

Chen

et al. 2023

J of Applied Polymer Sci

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A novel kind of polyoxometalate (POM) ‐containing Schiff based polyphosphazene microspheres (PSPMs) were successfully prepared through the polycondensation between POM‐containing polyaldehyde and 4,4′‐diaminodiphenylmethane. The PSPMs attained excellent thermal stability and demonstrated good monodispersity with a diameter of about 400 nm. In this work, the fire resistance of PSPMs was investigated in the epoxy resin (EP) matrices. Notably, the PSPMs displayed good distribution in EP matrices. Therefore, the dynamic mechanical properties of EP/PSPMs composite were enhanced. After the addition of 4 wt% PSPMs, the thermogravimetric analysis showed that the char yield at 750°C of the EP/PSPMs composite increased from 12.9 wt% (EP) to 29.0 wt% in nitrogen. And the composite attained a limiting oxygen index of 27.5% and passed the UL‐94V‐1 rating. In comparison with that of pure EP, the peak value of the heat release rate and total smoke production decreased dramatically. Meanwhile, the toxic CO gas was largely reduced due to the reduction reaction of POM during the combustion process. To further illuminate the flame‐retardant mechanism, the char residues and gaseous pyrolysis products of EP/PSPMs were examined. This work may provide a new perspective for the synthesis and application of functional metal‐containing polymer microspheres.

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Section: Methodsmentioning

confidence: 99%

“…Finally, the flame retarded mechanisms of PSPMs were investigated in the condensed phase and gas phase analysis, respectively. 34 and its 1 H NMR spectrum was shown in Figure S1. N 3 P 3 (OC 6 H 3 OCH 3 COH) 6 was obtained according to the literature, 35 and its 1 H NMR, and 31 P NMR results were exhibited in Figure S1.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of metal‐containing Schiff based cyclomatrix polyphosphazene microspheres based on polyoxometalates and application in flame retardance for epoxy resin

Peng

Chen

et al. 2023

J of Applied Polymer Sci

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“…[ 1‐4 ] The application of traditional POMs is limited by their structures, therefore, modification of POMs to improve the properties has become one of the important directions in the development of POMs. [ 5‐6 ] One of the methods to modify POMs is by changing anions. Furthermore, anions can be regulated by adding anion templates or external functional groups.…”

Section: Background and Originality Contentmentioning

confidence: 99%

Four New Terpyridine Complexes Based Polyoxometalates with [W₁₀O₃₂]^4– Anions as High‐Efficiency Dual‐Site Catalysis for Thioether Oxidation Reaction^†

Zhang,

Yu,

Wang

et al. 2023

Chin. J. Chem.

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Comprehensive SummaryPolyoxometalates modified with complex cations have attracted increasing attention because of the fascinating properties and the controllable structures. By adjusting the synthesis conditions, four new terpyridine complexes based hybrid POMs, [(TPY‐H)CuCl]4 [W10O32]·2DMF·2H2O (1), [(TPY‐H)Cu(DMSO)(H2O)]2[W10O32]·2H2O (2), [(TPY‐H)2Cu]2[W10O32]·6DMSO·8H2O (3) and [(TPY‐Br)CuCl (DMSO)(H2O)]2[(TPY‐Br)CuCl]2[W10O32]·2DMSO·4H2O (4), were prepared by using ‘one‐pot’ method. Sing‐crystal X‐ray diffraction analyses, infrared radiation, etc., revealed the structural composition of compounds 1—4, which indicates that synthesis conditions have a directional regulatory effect on the compounds synthesis. Thioether oxidation catalytic reactions show 1—4 have good catalytic activities, and powder X‐ray diffraction and thermogravimetry analysis show 1—4 have superduper catalytic stability. Moreover, 4 has better catalytic activity because of the different structure of terpyridine complexes. Therefore, a possible mechanism of dual‐site catalysis by both cations and anions is proposed.

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“…This is evidenced in recent reviews on this subject [ 1 – 5 ]. One approach that has significantly expanded the properties of these oligomeric species is their functionalization with organic or inorganic entities, making it possible to combine several properties in a single molecule [ 6 – 10 ]. These tailored complexes are protagonists in addressing contemporary problems with social impact regarding health, environment, energy, and information technologies [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of the tetravanadate [V4O12]4− anion on the structural, magnetic, and biological properties of copper/phenanthroline complexes

Sánchez-Lara,

Favela,

Tzian

et al. 2024

J Biol Inorg Chem

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The aim to access linked tetravanadate [V4O12]4− anion with mixed copper(II) complexes, using α-amino acids and phenanthroline-derived ligands, resulted in the formation of four copper(II) complexes [Cu(dmb)(Gly)(OH2)]2[Cu(dmb)(Gly)]2[V4O12]·9H2O (1) [Cu(dmb)(Lys)]2[V4O12]·8H2O (2), [Cu(dmp)2][V4O12]·C2H5OH·11H2O (3), and [Cu(dmp)(Gly)Cl]·2H2O (4), where dmb = 4,4′-dimethioxy-2,2′-bipyridine; Gly = glycine; Lys = lysine; and dmp = 2,9-dimethyl-1,10-phenanthroline. The [V4O12]4− anion is functionalized with mixed copper(II) units in 1 and 2; while in 3, it acts as a counterion of two [Cu(dmp)]2+ units. Compound 4 crystallized as a unit that did not incorporate the vanadium cluster. All compounds present magnetic couplings arising from Cu⋯O/Cu⋯Cu bridges. Stability studies of water-soluble 3 and 4 by UV–Vis spectroscopy in cell culture medium confirmed the robustness of 3, while 4 appears to undergo ligand scrambling over time, resulting partially in the stable species [Cu(dmp)2]+ that was also identified by electrospray ionization mass spectrometry at m/z = 479. The in vitro cytotoxicity activity of 3 and 4 was determined in six cancer cell lines; the healthy cell line COS-7 was also included for comparative purposes. MCF-7 cells were more sensitive to compound 3 with an IC50 value of 12 ± 1.2 nmol. The tested compounds did not show lipid peroxidation in the TBARS assay, ruling out a mechanism of action via reactive oxygen species formation. Both compounds inhibited cell migration at 5 µM in wound-healing assays using MCF-7, PC-3, and SKLU-1 cell lines, opening a new window to study the anti-metastatic effect of mixed vanadium–copper(II) systems. Graphical abstract

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Latest progress in asymmetrically functionalized Anderson-type polyoxometalates

Abstract: The Anderson-type polyoxometalates (POMs) are one of the most important and widely developed groups of the POMs family. The covalent functionalization of Anderson POMs have attracted extensive attention and facilitated...

Cited by 10 publications

References 96 publications

Synthesis of metal‐containing Schiff based cyclomatrix polyphosphazene microspheres based on polyoxometalates and application in flame retardance for epoxy resin

Synthesis of metal‐containing Schiff based cyclomatrix polyphosphazene microspheres based on polyoxometalates and application in flame retardance for epoxy resin

Four New Terpyridine Complexes Based Polyoxometalates with [W₁₀O₃₂]^4– Anions as High‐Efficiency Dual‐Site Catalysis for Thioether Oxidation Reaction^†

Effects of the tetravanadate [V4O12]4− anion on the structural, magnetic, and biological properties of copper/phenanthroline complexes

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Latest progress in asymmetrically functionalized Anderson-type polyoxometalates

Abstract: The Anderson-type polyoxometalates (POMs) are one of the most important and widely developed groups of the POMs family. The covalent functionalization of Anderson POMs have attracted extensive attention and facilitated...

Cited by 10 publications

References 96 publications

Synthesis of metal‐containing Schiff based cyclomatrix polyphosphazene microspheres based on polyoxometalates and application in flame retardance for epoxy resin

Synthesis of metal‐containing Schiff based cyclomatrix polyphosphazene microspheres based on polyoxometalates and application in flame retardance for epoxy resin

Four New Terpyridine Complexes Based Polyoxometalates with [W10O32]4– Anions as High‐Efficiency Dual‐Site Catalysis for Thioether Oxidation Reaction†

Effects of the tetravanadate [V4O12]4− anion on the structural, magnetic, and biological properties of copper/phenanthroline complexes

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Four New Terpyridine Complexes Based Polyoxometalates with [W₁₀O₃₂]^4– Anions as High‐Efficiency Dual‐Site Catalysis for Thioether Oxidation Reaction^†