Phosphorus-based ligand effects on the structure and radical scavenging ability of molecular nanoparticles of CeO2
Two new CeIV/O2- clusters, (pyH)8[Ce10O4(OH)4(O3PPh)12(NO3)12] (1) and [Ce6O4(OH)4(O2PPh2)4(O2CtBu)8] (2), have been prepared that contain P-based ligands for the first time. They were obtained from the reaction of (NH4)2[Ce(NO3)6], PhPO3H2 or Ph2PO2H, and tBuCO2H in a 2 : 1 : 2 molar ratio in pyridine/MeOH (10 : 1 mL). Both compounds contain a {Ce6O4(OH)4} face-capped octahedral core, with 1 containing an additional four CeIV on the outside to give a supertetrahedral Ce10 topology; the {Ce6O8} unit is the smallest recognizable fragment of the fluorite structure of CeO2. The HO˙ radical scavenging activities of 1 and 2 were measured by UV/vis spectral monitoring of methylene blue oxidation by HO˙ radicals in the presence and absence of the Ce/O clusters, and the results compared with those for larger Ce24 and Ce38 molecular nanoparticles of CeO2 prepared in previous work. 1 and 2 are both very poor HO˙ radical scavengers compared with Ce24 and Ce38, a result that is consistent with reports in the literature that PO43- ions inhibit the radical scavenging ability of traditional CeO2 nanoparticles and putatively assigned to PO43- binding to the surface.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:50 |
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| Enthalten in: |
Dalton transactions (Cambridge, England : 2003) - 50(2021), 43 vom: 09. Nov., Seite 15524-15532 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Russell-Webster, Bradley [VerfasserIn] |
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| Links: |
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| Anmerkungen: |
Date Revised 09.11.2021 published: Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1039/d1dt02667d |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM331839946 |
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| 245 | 1 | 0 | |a Phosphorus-based ligand effects on the structure and radical scavenging ability of molecular nanoparticles of CeO2 |
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| 500 | |a Date Revised 09.11.2021 | ||
| 500 | |a published: Electronic | ||
| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a Two new CeIV/O2- clusters, (pyH)8[Ce10O4(OH)4(O3PPh)12(NO3)12] (1) and [Ce6O4(OH)4(O2PPh2)4(O2CtBu)8] (2), have been prepared that contain P-based ligands for the first time. They were obtained from the reaction of (NH4)2[Ce(NO3)6], PhPO3H2 or Ph2PO2H, and tBuCO2H in a 2 : 1 : 2 molar ratio in pyridine/MeOH (10 : 1 mL). Both compounds contain a {Ce6O4(OH)4} face-capped octahedral core, with 1 containing an additional four CeIV on the outside to give a supertetrahedral Ce10 topology; the {Ce6O8} unit is the smallest recognizable fragment of the fluorite structure of CeO2. The HO˙ radical scavenging activities of 1 and 2 were measured by UV/vis spectral monitoring of methylene blue oxidation by HO˙ radicals in the presence and absence of the Ce/O clusters, and the results compared with those for larger Ce24 and Ce38 molecular nanoparticles of CeO2 prepared in previous work. 1 and 2 are both very poor HO˙ radical scavengers compared with Ce24 and Ce38, a result that is consistent with reports in the literature that PO43- ions inhibit the radical scavenging ability of traditional CeO2 nanoparticles and putatively assigned to PO43- binding to the surface | ||
| 650 | 4 | |a Journal Article | |
| 700 | 1 | |a Lopez-Nieto, Javi |e verfasserin |4 aut | |
| 700 | 1 | |a Abboud, Khalil A |e verfasserin |4 aut | |
| 700 | 1 | |a Christou, George |e verfasserin |4 aut | |
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