Metal complexes containing oxygen tripod ligands : models of metal oxides

2003 ◽  
Author(s):  
Chong Ho Lam
Keyword(s):  
Metal Complexes ◽  
Metal Oxides ◽  
Tripod Ligands

Schiff Base Metal Complexes Precursor for Metal Oxide Nanomaterial: A Review

2020 ◽  
Vol 16 ◽  
Author(s):  
Meghshyam K. Patil ◽  
Vijay H. Masand ◽  
Atish K. Maldhure
Keyword(s):  
Schiff Base ◽  
Metal Complexes ◽  
Metal Oxides ◽  
Base Metal ◽  
Carbonyl Compounds ◽  
Organic Transformations ◽  
Iron Cobalt ◽  
Methods Of Synthesis ◽  
Schiff Base Metal Complexes ◽  
Nickel Manganese

: Schiff bases and their complexes are versatile compounds, which have been synthesized from the condensation of carbonyl compounds with amino compounds and exhibit a broad range of applications in biological, medicinal, catalysis, and industrial purposes. Furthermore, Schiff base-metal complexes have been used as a precursor for the synthesis of different metal oxides, which includes oxides of iron, cobalt, copper, nickel, manganese, vanadium, cadmium, zinc, mercury, etc. and ferrites such as Fe3O4, ZnFe2O4, and ZnCo2O4. These metal oxides have been utilized for several applications, which includes as a catalyst for several organic transformations and for biological activity. This review encompasses different methods of synthesis of metal oxides using Schiff base metal complexes precursor, their characterization, and various applications in detail.

Synthesis of C1-Symmetric Tripod Ligands Containing a P,P,N Donor Set − η2-Coordination in d8-Metal Complexes

2003 ◽  
Vol 2003 (9) ◽  
pp. 1681-1693 ◽  
Author(s):  
Ralf Faissner ◽  
Gottfried Huttner ◽  
Elisabeth Kaifer ◽  
Peter Rutsch
Keyword(s):  
Metal Complexes ◽  
Tripod Ligands

scholarly journals METAL COMPLEXES AS NEW PRO-ECOLOGICAL CROSSLINKING AGENTS FOR CHLOROPRENE RUBBER BASED ON HECK COUPLING REACTION

2019 ◽  
Vol 92 (3) ◽  
pp. 589-597 ◽  
Author(s):  
Anna Dziemidkiewicz ◽  
Martyna Pingot ◽  
Magdalena Maciejewska
Keyword(s):  
Metal Complexes ◽  
Metal Oxides ◽  
Reference Sample ◽  
Coupling Reaction ◽  
Industrial Applications ◽  
Rubber Blends ◽  
Crosslinking Process ◽  
Chloroprene Rubber ◽  
High Degree ◽  
Crosslinking Agents

ABSTRACT The influence of new pro-ecological curing agents on the crosslinking process of chloroprene rubber (CR) was examined. The proposed curing system used a simpler recipe (no need to apply harmful products such as zinc oxide and ethylene thiourea) and cost less than standard metal oxides. It was expected that the mechanism of crosslinking would be similar to that of Heck-type reactions. Heck-type reactions are powerful tools for the creation of new C=C bonds. They provide the simplest and most efficient way to synthesize a variety of important compounds used in many areas, such as pharmaceuticals, antioxidants, ultraviolet absorbers, and industrial applications. However, despite their wide application, Heck-type reactions have not been used in the rubber industry so far. Rubber blends containing acetylacetonates with different transition metals as new crosslinking agents were filled with fumed silica Aerosil 380 or carbon black Corax N-550. It was found that metal complexes are active crosslinking agents of the CR composites. The obtained vulcanizates were characterized by a high degree of crosslinking and good mechanical properties. Considering the high tensile strength and degree of crosslinking, iron acetylacetonate was the most effective curing agent of the used metal complexes. Compared with the reference sample cured with metal oxides, the CR samples crosslinked using metal acetylacetonates had a higher activity.

Sulfur Vulcanization of Simple Model Olefins Part III: Vulcanization of 2,3-Dimethyl-2-Butene in the Presence of Different Metal Complexes

1994 ◽  
Vol 67 (2) ◽  
pp. 263-279 ◽  
Author(s):  
P. Versloot ◽  
J. G. Haasnoot ◽  
J. Reedijk ◽  
M. van Duin ◽  
J. Put
Keyword(s):  
Zinc Oxide ◽  
Simple Model ◽  
Metal Complexes ◽  
Metal Oxides ◽  
Molecular Model ◽  
Sulfur Vulcanization

Abstract The mechanism of the sulfur vulcanization of rubber was studied by using 2,3-dimethyl-2-butene (C6H12) as a simple, low-molecular model alkene. Only equivalent allylic positions are present in this alkene. Treating C6H12 with a mixture of ZnO, S8 and the accelerator tetramethylthiuramdisulfide at 140°C yields a mixture of addition products (C6H11—Sn—C6H11). Similar reactions in the presence of various metal oxides instead of zinc oxide show poor vulcanization results. Experiments with various metal dithiocarbamate complexes show a reactivity towards vulcanization in the following sequence: Zn(detc)2>Cd(detc)2>Cu(detc)2>Pb(detc)2>Zn(dmtc)2>Ni(detc)2>Cu(dmtc)2.

Metal complexes of tridentate tripod ligands in medical imaging and therapy

Polyhedron ◽  
2017 ◽  
Vol 125 ◽  
pp. 186-205 ◽  
Author(s):  
Francisco Silva ◽  
Célia Fernandes ◽  
Maria Paula Cabral Campello ◽  
António Paulo
Keyword(s):  
Medical Imaging ◽  
Metal Complexes ◽  
Tripod Ligands
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