A new type of stable radical ligand featuring a 1,1-bis-phosphinosulfide alkene backbone has been prepared and characterized on the basis of X-ray diffraction, EPR and DFT studies.
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http://dx.doi.org/10.1039/b715380e | DOI Listing |
J Bacteriol
January 2025
Department of Pathology, Microbiology, and Immunology, University of Nebraska Medical Center, Omaha, Nebraska, USA.
Unlabelled: is one of the most virulent bacterial pathogens known and causes the disease tularemia, which can be fatal if untreated. This zoonotic and intracellular pathogen is exposed to diverse environmental and host stress factors that require an appropriate response to survive. However, the stress tolerance mechanisms used by to persist are not fully understood.
View Article and Find Full Text PDFSmall
January 2025
Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia.
A polyacrylamide gel method has been used to synthesize a variety of polyvalent-transition-metal-doped Ni position of high entropy spinel oxides (NiZnMgCuCo)AlO-800 °C (A) on the basis of NiAlO, and the catalytic activity of A is studied under the synergistic action of peroxymonosulfate (PMS) activation and simulated sunlight. The A containing polyvalent transition metals (Ni, Cu, and Co) can effectively activate PMS and efficiently degrade levofloxacin (LEV) and tetracycline hydrochloride (TCH) under simulated sunlight irradiation. After 90 min of light exposure, the degradation percentages of LEV (50 mg L) and TCH (100 mg L) degrade by the A/PMS/vis system reach 87.
View Article and Find Full Text PDFDalton Trans
January 2025
Department of Chemistry, Southern Illinois University Edwardsville, Edwardsville, IL, 62025-1652 USA.
The electrochemistry and spectroelectrochemistry of Ru(porphyrin)(NO)(phenoxide) complexes Ru(por)(NO)(OPh) (por = OEP, 1a; TAP, 2a; Ph = CH), Ru(por)(NO)(OAr) (por = OEP, 1b; TAP, 2b; OAr = -OCH-(2-NHC(O)CF)), Ru(por)(NO)(OAr) (por = OEP, 1c; TAP, 2c; OAr = OCH-(2,6-NHC(O)CF); OEP = octaethylporphyrinato dianion, TAP = tetraanisolylporphyrinato dianion) indicate that initial one-electron oxidation results in structure-dependent net reactivity at the phenoxide ligand. Oxidation of 1a generates 1a+, which undergoes a relatively slow rate-limiting second-order follow-up reaction. In contrast, 2a undergoes a diffusion-limited follow-up reaction after oxidation.
View Article and Find Full Text PDFChem Asian J
January 2025
University of Tasmania, School of Natural Sciences - Chemistry, AUSTRALIA.
Verdazyls are a fundamental class of stable organic radicals that have been traditionally overshadowed by the more synthetically accessible stable nitroxide radicals. With the advent of enhanced synthetic routes to verdazyls, particularly in recent years, these systems are now poised to realise their potential in a range of applications across emerging technologies that will be important to addressing challenges faced by modern society. This Concept discusses the enabling properties of a selection of verdazyl-based systems that feature promising applications in energy storage, molecular electronics and magnetic molecules.
View Article and Find Full Text PDFChem Sci
January 2025
Department of Chemical Physiology and Biochemistry, School of Medicine, Oregon Health & Science University 3181 SW Sam Jackson Park Road Portland Oregon 97239 USA
Mycobacterial hemerythrin-like proteins (HLPs) are important for the survival of pathogens in macrophages. Their molecular mechanisms of function remain poorly defined but recent studies point to their possible role in nitric oxide (NO) scavenging. Unlike any nonheme diiron protein studied so far, the diferric HLP from (-HLP) reacts with NO in a multistep fashion to consume four NO molecules per diiron center.
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