Polyoxometalates for bifunctional applications: Catalytic dye degradation and anticancer activity

Ong, Boon Chong; Lim, Hong Kit; Tay, Chor Yong; Lim, Tuti Mariana; Dong, Zhili

doi:10.1016/j.chemosphere.2021.131869

Cited by 25 publications

(10 citation statements)

References 68 publications

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“…The antibacterial properties and antitumor activity of the heteropolytungstates in aquaeous solution have also been reported by Ma et al [ 22 ]. The anticancer properties of POMs were reported by Shin et al, Bijelic et al, Li et al, Hu et al, and Lu et al [ 23 , 24 , 25 , 26 , 27 , 28 ]. Chaudhary et al used polyoxo compounds as nano-inhibitors of amyloid aggregation [ 29 ].…”

Section: Introductionmentioning

confidence: 93%

New Organic-Inorganic Hybrid Compounds Based on Sodium Peroxidomolybdates (VI) and Derivatives of Pyridine Acids: Structure Determination and Catalytic Properties

et al. 2022

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Two organic-inorganic hybrids based on sodium peroxidomolybdates(VI) and 3,5-dicarboxylic pyridine acid (Na-35dcpa) or N-oxide isonicotinic acid (Na-isoO) have been synthesized and characterized. All compounds contain inorganic parts: a pentagonal bipyramid with molybdenum center, and an organic part containing 3,5-dicarboxylic pyridine acid or N-oxide isonicotinic acid moieties. The type of organic part used in the synthesis influences the crystal structure of obtained compounds. This aspect can be interesting for crystal engineering. Crystal structures were determined using powder X-ray diffraction or single crystal diffraction for compounds Na-35dcpa and Na-isoO, respectively. Elemental analysis was used to check the purity of the obtained compounds, while X-ray Powder Diffraction (XRPD) vs. temp. was applied to verify their stability. Moreover, all the compounds were examined by Infrared (IR) spectroscopy. Their catalytic activity was tested in the Baeyer–Villiger (BV) oxidation of cyclohexanone to ε-caprolactone in the oxygen-aldehyde system. The highest catalytic activity in the BV oxidation was observed for Na-35dcpa. The compounds were also tested for biological activity on human normal cells (fibroblasts) and colon cancer cell lines (HT-29, LoVo, SW 620, HCT 116). All compounds were cytotoxic against tumor cells with metastatic characteristics, which makes them interesting and promising candidates for further investigations of specific anticancer mechanisms.

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Section: Introductionmentioning

confidence: 93%

New Organic-Inorganic Hybrid Compounds Based on Sodium Peroxidomolybdates (VI) and Derivatives of Pyridine Acids: Structure Determination and Catalytic Properties

et al. 2022

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“…Among these, POMs are most prevalently applied in the field of catalysis due to their ability to catalyze fast and invertible stepwise multielectron-transfer reactions. In this regard, POMs have been proven to be able to act as robust catalysts in the simulation of various reactions, including water oxidation [15][16][17], water reduction [18,19], arsenic oxidation [20], alcohol oxidation [21], gasoline oxidative desulphurization [22] and pollutant remediation [23,24]. In addition, POMs have been widely applied in dye-sensitized solar cells [25], fuel cell [26]., rechargeable batteries [27], electrochromism [28], gas sensing [29], membrane technology [30] and the biological sector [23].…”

Section: Introductionmentioning

confidence: 99%

An Efficient Photocatalytic Oxygen Evolution System with the Coupling of Polyoxometalates with Bismuth Vanadate

Ong,

Lim,

Xue

et al. 2024

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In this work, a coupling system consisting of bismuth vanadate (BiVO4) and cobalt-based polyoxometalates (Co-POMs) was developed to enhance the oxygen evolution reaction. Crystallization-driven self-assembly and the wet chemical synthesis method were deployed in synthesizing Co-POMs and monoclinic–tetragonal mixed–phase BiVO4, respectively. The introduction of Co-POMs into a BiVO4-containing mixture significantly enhanced the water oxidation reaction, with a more than twofold increment in the total amount of oxygen evolved. For instance, 461.2 µmol of oxygen was evolved from the system containing 20 mg of Co-POMs compared to 195 µmol of oxygen produced from a pristine BiVO4 system. This extraordinary improvement in the oxygen evolution reaction indicates the existence of a positive synergic effect between BiVO4 and Co-POMs, in which Co-POMs could act as effective cocatalysts to extract photogenerated charge carriers generated by BiVO4 and improve the charge transfer process. However, the amount of oxygen produced was slightly reduced to 440.7 µmol with an increase in AgNO3 loading from 30 mg to 60 mg. This unforeseen phenomenon could be elucidated by the shielding effect of silver particles, in which a higher AgNO3 loading led to a more prominent shielding effect. The presence of silver nanoparticles on post-reaction BiVO4 was confirmed by TEM and XPS analysis. This newly established process scheme provides an insight into the development of an efficient photocatalytic oxygen evolution system in realizing future commercial applications toward green energy production.

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“…Owing to their unique topological versatility, electronic diversity, and rich physicochemical property, Polyoxometalates (POMs), a well-known kind of metal–oxygen cluster formed by groups VB and VIB transition metals (e.g., V 5+ , Nb 5+ , Mo 6+ and W 6+ ), have been used in the fields of catalysis, electromagnetism, sensors, medicine, nanomaterials [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ]. Hybrid materials based on POMs have been extensively studied in coordination with chemistry and solid-state materials chemistry; since then, the first POMs were prepared in 1826 and the first structural details of Keggin POMs were reported in 1933 [ 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Two New Compounds Based on Bi-Capped Keggin Polyoxoanions and Cu-Bpy Cations Contain Both CuII and CuI Complexes: Synthesis, Characterization and Properties

et al. 2023

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Two inorganic–organic hybrid complexes based on bi-capped Keggin-type cluster, {([CuII(2,2′-bpy)2]2[PMoVI8VV2VIV2O40(VIVO)2])[CuI(2,2′-bpy)]}∙2H2O (1) and {[CuII(2,2′-bpy)2]2[SiMoVI8.5MoV2.5VIVO40(VIVO)2]}[CuI0.5(2,2′-bpy)(H2O)0.5] (2) (bpy = bipyridine), had been hydrothermally synthesized and structurally characterized by elemental analysis, FT-IR, TGA, PXRD and X-ray single-crystal diffraction analysis. Compound 1 consists of a novel 1-D chain structure constructed from [CuI(2,2′-bpy)]+ unit linking bi-supported POMs anion {[CuII(2,2′-bpy)2]2[PMoVI8VV2VIV2O40(VIVO)2]}−. Compound 2 is a bi-capped Keggin cluster bi-supported Cu-bpy complex. The main highlights of the two compounds are that Cu-bpy cations contain both CuI and CuII complexes. Furthermore, the fluorescence properties, the catalytic properties, and the photocatalytic performance of compounds 1 and 2 have been assessed, and the results show that both compounds are active for styrene epoxidation and degradation and adsorption of Methylene blue (MB), Rhodamine B (RhB) and mixed aqueous solutions.

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Polyoxometalates for bifunctional applications: Catalytic dye degradation and anticancer activity

Cited by 25 publications

References 68 publications

New Organic-Inorganic Hybrid Compounds Based on Sodium Peroxidomolybdates (VI) and Derivatives of Pyridine Acids: Structure Determination and Catalytic Properties

New Organic-Inorganic Hybrid Compounds Based on Sodium Peroxidomolybdates (VI) and Derivatives of Pyridine Acids: Structure Determination and Catalytic Properties

An Efficient Photocatalytic Oxygen Evolution System with the Coupling of Polyoxometalates with Bismuth Vanadate

Two New Compounds Based on Bi-Capped Keggin Polyoxoanions and Cu-Bpy Cations Contain Both CuII and CuI Complexes: Synthesis, Characterization and Properties

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