The aqueous and non-aqueous chemistry of the complex [Mn2(III,IV)(μ-CH3COO)(μ-O)2(Me4dtne)](PF6)2 (where Me4dtne = 1,2-bis(4,7-dimethyl-1,4,7-triazacyclonon-1-yl)ethane), which has been demonstrated as an exceptionally active catalyst in the bleaching of raw cotton and especially wood pulp at high pH (>11), is explored by UV/vis absorption, Raman and EPR spectroscopies and cyclic voltammetry. The data indicate that dissociation of the μ-acetato bridge is essential to the catalyst activity and rationalises the effect of sequestrants such as DTPA on its performance.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/c3dt53174k | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Organic Moiety on Sn(IV) Does Matter for In Vitro Mode of Action: BuSn(IV) Compounds with Carboxylato -Functionalized 2-Quinolones Induce Anoikis-like Cell Death in A375 Cells.
Pharmaceutics
November 2024
Department of Chemistry and Biochemistry, Faculty of Agriculture, University of Belgrade, Nemanjina 6, 11080 Belgrade, Serbia.
New tributyltin(IV) complexes containing the carboxylate ligands 3-(4-methyl-2-oxoquinolin-1(2H)-yl)propanoic acid () and 2-(4-methyl-2-oxoquinolin-1(2H)-yl)acetic acid () have been synthesized. Their structures have been determined by elemental microanalysis, FT-IR and multinuclear NMR (H, C and Sn) spectroscopy and X-ray diffraction study. A solution state NMR analysis reveals a four-coordinated tributyltin(IV) complex in non-polar solvents, while an X-Ray crystallographic analysis confirms a five-coordinated trigonal-bipyramidal geometry around the tin atom due to the formation of 1D chains.
View Article and Find Full Text PDFStructure prediction of physiological bis(amino acidato)copper(II) species in aqueous solution: The copper(II) compounds with l-glutamine and l-histidine.
J Inorg Biochem
February 2024
Institute for Medical Research and Occupational Health, Ksaverska cesta 2, HR-10000 Zagreb, Croatia. Electronic address:
Neutral (l-histidinato)(l-glutaminato)copper(II) [Cu(His)(Gln)] has been established as the most abundant ternary copper(II) amino acid compound of the exchangeable copper(II) pool in blood plasma. The experimental studies of Cu(His)(Gln) and bis(glutaminato)copper(II) [Cu(Gln)] in solutions did not specify their complete geometries. To determine the geometries, this paper investigates the conformers, energy landscapes, and a structure-magnetic parameters relation of Cu(Gln) and Cu(His)(Gln) by the density functional theory (DFT) calculations.
View Article and Find Full Text PDFMolecular Engineering of Quinone-Based Nickel Complexes and Polymers for All-Organic Li-Ion Batteries.
Molecules
October 2022
Faculty of Chemistry and Pharmacy, University of Sofia, 1164 Sofia, Bulgaria.
All-organic Li-ion batteries appear to be a sustainable and safer alternative to the currently-used Li-ion batteries but their application is still limited due to the lack of organic compounds with high redox potentials toward Li/Li. Herein, we report a computational design of nickel complexes and coordination polymers that have redox potentials spanning the full voltage range: from the highest, 4.7 V, to the lowest, 0.
View Article and Find Full Text PDFFactors Governing the Catalytic Insertion of CO into Arenes - A DFT Case Study for Pd and Pt Phosphane Sulfonamido Complexes.
Chemistry
April 2022
Institut für Technische und Makromolekulare Chemie, RWTH Aachen University, Worringer Weg 2, 52074, Aachen, Germany.
The potential of Pd/Pt complexes for catalytic carboxylation of arenes with CO is investigated by means of computational chemistry. Recently we reported that the bis[(2-methoxyphenyl)phosphino]-benzenesulfonamido palladium complex 1 inserts CO reversibly in its Pd-C(aryl) bond generating carboxylato complex 2. In the present work we study how geometric and electronic factors of various ligands and substrates influence the overall activation barrier (energy span, ES) of a potential catalytic cycle for arene carboxylation comprising this elementary step.
View Article and Find Full Text PDFCombining Structural with Functional Model Properties in Iron Synthetic Analogue Complexes for the Active Site in Rabbit Lipoxygenase.
J Am Chem Soc
August 2021
Department of Chemistry, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany.
Iron complexes that model the structural functional properties of the active iron site in rabbit lipoxygenase are described. The ligand sphere of the mononuclear pseudo-octahedral -(carboxylato)(hydroxo)iron(III) complex, which is completed by a tetraazamacrocyclic ligand, reproduces the first coordination shell of the active site in the enzyme. In addition, two corresponding iron(II) complexes are presented that differ in the coordination of a water molecule.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!