An unusual example of a potassium capped terminal cobalt-oxido complex has been isolated and crystallographically characterized. The synthesis of [DHP]CoOK proceeds from a previously reported parent compound, [DHP]CoOH, deprotonation with KOBu. Structural and electronic characterization suggest a weakly coupled dimer in a distinct seesaw geometry with a Co(III) oxidation state and a non-innocent radical ligand.
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http://dx.doi.org/10.1039/d4cc03014a | DOI Listing |
Angew Chem Int Ed Engl
December 2024
Université de Mons: Universite de Mons, Sciences, BELGIUM.
This study introduces a novel one-pot strategy for the chemical valorization of poly(lactic acid) (PLA), coupling its base-catalyzed depolymerization with the ring-opening polymerization (ROP) of trimethylene carbonate (TMC). The process exploits an eutectic mixture of lactide (LA) and TMC, which lowers the thermal input required for PLA degradation. Using potassium aryloxide (KOArtBu) as a bifunctional catalyst, the PLA is first quickly hydrolyzed into oligomers or lactic acid, which subsequently initiate the slower polymerization of TMC.
View Article and Find Full Text PDFHeliyon
December 2024
Department of Tissue Engineering and Applied Cell Sciences, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran.
KTiOPO (KTP) nanoparticles (NPs) are potential materials as biolabels for long-term imaging. Optimizing their properties can lead to higher imaging efficiency and lower cytotoxicity and side effects. In this study, these nanoparticles were synthesized using the co-precipitation method and capping agents of oxalic acid and glycine.
View Article and Find Full Text PDFACS Appl Energy Mater
September 2024
Department of Chemical and Bimolecular Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States.
Stress-relieving and electrically conductive single-walled carbon nanotubes (SWNTs) and conjugated polymer, poly[3-(potassium-4-butanoate)thiophene] (PPBT), wrapped silicon microparticles (Si MPs) have been developed as a composite active material to overcome technical challenges such as intrinsically low electrical conductivity, low initial Coulombic efficiency, and stress-induced fracture due to severe volume changes of Si-based anodes for lithium-ion batteries (LIBs). The PPBT/SWNT protective layer surrounding the surface of the microparticles physically limits volume changes and inhibits continuous solid electrolyte interphase (SEI) layer formation that leads to severe pulverization and capacity loss during cycling, thereby maintaining electrode integrity. PPBT/SWNT-coated Si MP anodes exhibited high initial Coulombic efficiency (85%) and stable capacity retention (0.
View Article and Find Full Text PDFChem Commun (Camb)
August 2024
Department of Chemistry, University of Chicago, 929 E. 57th Street, Chicago, IL 60637, USA.
An unusual example of a potassium capped terminal cobalt-oxido complex has been isolated and crystallographically characterized. The synthesis of [DHP]CoOK proceeds from a previously reported parent compound, [DHP]CoOH, deprotonation with KOBu. Structural and electronic characterization suggest a weakly coupled dimer in a distinct seesaw geometry with a Co(III) oxidation state and a non-innocent radical ligand.
View Article and Find Full Text PDFIndian J Microbiol
June 2024
Physics department, College of Science, University Of Anbar, Ramadi, Iraq.
Scientific researches on the synthesis, characterisation, and biological activity of potassium nanoparticles (K NPs) are extremely rare. In our study, we successfully synthesised a novel form of K NPs using () flower extract as a reducing and capping agent. The formation of K NPs in new form (KO NPs) was confirmed by UV-vis and XRD spectra.
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