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Formation of a cyclooctatetraenylsamarium(III) inverse sandwich that ring-opens tetrahydrofuran.
Dalton Trans
March 2023
College of Science & Engineering, James Cook University, Townsville, QLD, 4811, Australia.
Reductive trapping of the cyclooctatetraenyl dianion (COT) by treatment of [Sm(DippForm)(thf)] (DippFormH = ,'-bis(2,6-diisopropylphenyl)formamidine; thf = tetrahydrofuran) with 1,3,5,7-cyclooctatetraene (CH) in toluene yields an inverse sandwich dinuclear complex [Sm(DippForm)(COT)] (1), but [Sm(DippForm)(COT)(thf)] (2) and [Sm(DippForm)(O-CH-DippForm)(thf)] (3) in thf, and 1 yields 2 and 3 on treatment with thf.
View Article and Find Full Text PDFMolecular Capacitors: Accessible 6- and 8-Electron Redox Chemistry from Dimeric "Ti(I)" and "Ti(0)" Synthons Supported by Imidazolin-2-Iminato Ligands.
Inorg Chem
October 2022
Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States.
Reduction of the diamagnetic Ti(III)/Ti(III) dimer [ClTi(μ-NIm)] () (NIm = [1,3-bis(Dipp)imidazolin-2-iminato], Dipp = CH-2,6-Pr) with 4 and 6 equiv of KC generates the intramolecularly arene-masked, dinuclear titanium compounds [(μ-N-η-Im)Ti] () and {[(EtO)K](μ-N-μ:η-Im)Ti} (), respectively, in modest yields. The compounds have been structurally characterized by X-ray crystallographic analysis, and inspection of the bond metrics within the η-coordinated aryl substituent of the bridging imidazolin-2-iminato ligand shows perturbation of the aromatic system most consistent with two-electron reduction of the ring. As such, and can be assigned respectively as possessing metal centers in formal Ti(III)/Ti(III) and Ti(II)/Ti(II) oxidation states.
View Article and Find Full Text PDFAcceptance of semipermeable glove liners compared to cotton glove liners in health care workers with work-related skin diseases: Results of a quasi-randomized trial under real workplace conditions.
Contact Dermatitis
November 2021
Department of Dermatology, Environmental Medicine and Health Theory, University of Osnabrück, Osnabrück, Germany.
Background: Glove liners (GLs) made of cotton (COT) are worn under impermeable gloves to prevent occlusion effects. Semipermeable GLs made of Sympatex (SYM) might be an alternative.
Objectives: To evaluate the acceptance of GLs (COT/SYM) in health care workers (HCWs) with work-related skin diseases (WRSDs).
Clinical Impact of Crossover Techniques for Primary Access Hemostasis in Transfemoral Transcatheter Aortic Valve Replacement Procedures.
J Invasive Cardiol
April 2021
Quebec Heart & Lung Institute, Laval University, 2725, Chemin Sainte-Foy, Québec, Canada G1V 4G5.
Article Synopsis
- The study aimed to assess vascular complications (VCs) after transfemoral transcatheter aortic valve replacement (TAVR) using a crossover technique (COT) with new-generation devices.
- *The multicenter research involved 2,214 patients, comparing outcomes between those using COT and those who did not, revealing that while major VCs and mortality rates were similar, minor VCs and acute renal failure were more common in the COT group.
- *Ultimately, while COT did not show a significant advantage in reducing major complications, it may benefit high-risk patients, particularly those with obesity, suggesting a need for personalized treatment strategies.
Kinetic Investigation on Tetrakis(4-Sulfonatophenyl)Porphyrin J-Aggregates Formation Catalyzed by Cationic Metallo-Porphyrins.
Molecules
December 2020
Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina and C.I.R.C.M.S.B. V.le F. Stagno D'Alcontres, 31-98166 Messina, Italy.
Under mild acidic conditions, various metal derivatives of tetrakis(4--methylpyridinium)porphyrin (gold(III), AuT; cobalt(III), CoT; manganese(III), MnT and zinc(II), ZnT) catalytically promote the supramolecular assembling process of the diacid 5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrin (HTPPS) into J-aggregates. The aggregation kinetics have been treated according to a well-established model that involves the initial formation of a critical nucleus containing porphyrin units, followed by autocatalytic growth, in which the rate evolves as a power of time. An analysis of the extinction time traces allows to obtain the rate constants for the auto-catalyzed pathway, , and the number of porphyrins involved in the initial seeding.
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