Catalytic Behaviors of CoII and MnII Compounds Bearing α-Diimine Ligands for Oxidative Polymerization or Drying Oils

Lima, Gilvan E. S.; Nunes, Everton Vinícius; Dantas, Roberta C.; Simone, C. A. De; Meneghetti, Mário R.; Meneghetti, Simoni Margareti Plentz

doi:10.21577/0103-5053.20170155

Cited by 6 publications

(4 citation statements)

References 16 publications

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“…Another weak point of manganese-based driers is their dark brown color that shifts coloration of the transparent and pale-pigmented formulations . Improved drying properties were reported for the formulations of manganese(II) carboxylates treated with various N,N -chelating ligands. − Detailed investigation of the coordination behavior of manganese revealed the appearance of the tetranuclear Mn 2 II /Mn 2 III species (Scheme , Structure A), which is responsible for the increased activity of the 2,2′-bipyridine derivative. , …”

Section: Manganese-based Driersmentioning

confidence: 99%

Curing of Air-Drying Paints: A Critical Review

Honzı́ček

2019

Ind. Eng. Chem. Res.

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This review article provides a comprehensive overview of curing processes relevant to air-drying paints. It is focused not only on binders derived from plant oils but also on oriental lacquers and their synthetic congeners as their solidification and hardening processes are driven by chemical reactions with air-oxygen. The main aim of this article is to bring a critical look on this subject omitting deep-seated misinterpretation and oversimplification often appearing in the field of paint technology. Such objective was achieved by utilization of the latest knowledge appearing in various areas of chemical research, e.g. organic chemistry, biochemistry, physical chemistry, computational chemistry and inorganic chemistry.

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Section: Manganese-based Driersmentioning

confidence: 99%

Curing of Air-Drying Paints: A Critical Review

Honzı́ček

2019

Ind. Eng. Chem. Res.

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“…The cobalt catalyst provides both the formation of hydroperoxides and their decomposition due to the formation of stable ions. The combination of these radicals initiates the crosslinking reaction [22] . Other possible termination reactions described by Charamzová et al [23] suggest that alkoxide groups, formed from hydroxyl groups (major components of Protium heptaphyllum resin), can be combined with radicals from unsaturations.…”

Section: Characterization Of Precursor Materials and Bioadhesivementioning

confidence: 99%

Development of a bio-based adhesive from Protium heptaphyllum resin

et al. 2021

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In this work, a bio-based adhesive is prepared from Protium heptaphyllum resin. The resin is first characterized by 1 H and 13 C nuclear magnetic resonance spectroscopy and the bioadhesive is then prepared using a simple mixture of the resin with linseed oil, catalyzed by cobalt octanoate, to induce crosslinking. The precursors and bioadhesive obtained are characterized by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FTIR). The NMR analysis shows the presence of groups of triterpenes, such as α-and β-amyrins, and diols, such as brein and maniladiol. Thermogravimetric analysis reveals that the resin has less thermal stability than the bioadhesive. Mechanical tests indicate that the bioadhesive has greater adhesion strength compared to the commercial adhesive, reaching an average stress at break of 7.66 and 0.113 MPa for the wood and carbon steel substrates, respectively. In conclusion, the bioadhesive can be used for the production of composites.

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“…One of the most studied redox-active ligands are α-diimines or 1,4-diaza-1,3-butadienes [ 17 , 18 , 19 , 20 ]. Compounds of such ligands are mainly investigated for creating efficient catalysts [ 21 , 22 , 23 , 24 , 25 ], small molecules activation [ 26 , 27 , 28 ] and switchable materials [ 29 , 30 , 31 , 32 , 33 , 34 , 35 ]. It has recently been found that platinum and palladium α-diimine complexes reveal cytotoxicity against various cancer cells [ 36 , 37 ].…”

Section: Introductionmentioning

confidence: 99%

α-Diimine Cisplatin Derivatives: Synthesis, Structure, Cyclic Voltammetry and Cytotoxicity

et al. 2022

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Three new Pt(II) complexes [(dpp-DAD)PtCl2] (I), [(Mes-DAD(Me)2)PtCl2] (II) and [(dpp-DAD(Me)2)PtCl2] (III) were synthesized by the direct reaction of [(CH3CN)2PtCl2] and corresponding redox-active 1,4-diaza-1,3-butadienes (DAD). The compounds were isolated in a single crystal form and their molecular structures were determined by X-ray diffraction. The purity of the complexes and their stability in solution was confirmed by NMR analysis. The Pt(II) ions in all compounds are in a square planar environment. The electrochemical reduction of complexes I–III proceeds in two successive cathodic stages. The first quasi-reversible reduction leads to the relatively stable monoanionic complexes; the second cathodic stage is irreversible. The coordination of 1,4-diaza-1,3-butadienes ligands with PtCl2 increases the reduction potential and the electron acceptor ability of the DAD ligands. The synthesized compounds were tested in relation to an adenocarcinoma of the ovary (SKOV3).

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Catalytic Behaviors of CoII and MnII Compounds Bearing α-Diimine Ligands for Oxidative Polymerization or Drying Oils

Cited by 6 publications

References 16 publications

Curing of Air-Drying Paints: A Critical Review

Curing of Air-Drying Paints: A Critical Review

Development of a bio-based adhesive from Protium heptaphyllum resin

α-Diimine Cisplatin Derivatives: Synthesis, Structure, Cyclic Voltammetry and Cytotoxicity

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