Spectral and physico-chemical investigations of novel homo-dinuclear di-μ2-alkoxo bridged Schiff base complexes: 57Fe Mössbauer parameters of the Fe(III) complex

2010 ◽  
Vol 75 (2) ◽  
pp. 841-845
Author(s):  
Zafar A. Siddiqi ◽  
Mohd Khalid ◽  
Sarvendra Kumar ◽  
M. Shahid ◽  
Shabana Noor
Keyword(s):  
Schiff Base ◽  
Schiff Base Complexes ◽  
57Fe Mössbauer ◽  
Physico Chemical ◽  
Mössbauer Parameters

Preparation of Immobilized Chromium Schiff Base Complexes and their Catalytic Performance for Olefins Epoxidation

2014 ◽  
Vol 692 ◽  
pp. 240-244
Author(s):  
Gong De Wu ◽  
Xiao Li Wang ◽  
Zhi Li Zhai
Keyword(s):  
Hydrogen Peroxide ◽  
Schiff Base ◽  
Elemental Analysis ◽  
Catalytic Performance ◽  
Schiff Base Complexes ◽  
Metal Centers ◽  
Chemical Measurements ◽  
Physico Chemical ◽  
Immobilized Complexes ◽  
Mcm 41

A series of transition metal alanine-salicylaldehyde Schiff base chromium (III) complexes immobilized on MCM-41 were prepared and characterized by various physico-chemical measurements such as FIIR, XRD, HRTEM, N2 sorption and elemental analysis. The immobilized complexes were effective and stable catalysts for the epoxidation of styrene and cyclohexene with 30% hydrogen peroxide. Moreover, the metal centers were found to play important roles in the catalytic performance of immobilized complex catalysts.

Green synthesis and spectroscopic studies of some complexes compounds as pigments and their applications in paints

2017 ◽  
Vol 46 (4) ◽  
pp. 286-295 ◽  
Author(s):  
Osama A.G. Wahba ◽  
Ali M. Hassan ◽  
Abdelrahman M. Naser ◽  
Adel M.G. Hanafi
Keyword(s):  
Schiff Base ◽  
Green Synthesis ◽  
Simple Technique ◽  
Spectroscopic Studies ◽  
Schiff Base Complexes ◽  
High Yield ◽  
Corrosion Properties ◽  
Content Type ◽  
Physico Chemical ◽  
The Cost

Purpose The purpose of this study to investigate the synthesis of new Cr(III), Fe(III), Ni(II) and Cu(II) Schiff base complexes by a simple technique (microwave technique). The evaluation of the prepared complexes as pigments as corrosion resistant was also explored. Design/methodology/approach The Schiff base complexes were prepared by using microwave method (green chemistry), and then, the physico-chemical requirements according to standards for the synthesised pigments were investigate. Findings The prepared complexes exhibit good physical, mechanical and corrosion properties as pigments in paint formulations. Research limitations/implications The simple technique used for synthesis of metal complex pigments will significantly increase the cost saving for the manufacturing of such pigments category. Also, the used technique is considered a green method (eco-friendly), as there no organic solvent was used. Practical implications The evaluation of the prepared complex pigments as corrosion resistants was also studied. Originality/value It is a simple technique, green synthesis (no solvent used) is involved and high yield is obtained.

Catalytic and physico-chemical properties of new schiff base complexes in zeolites

1995 ◽  
Vol 6 (1-2) ◽  
pp. 49-57 ◽  
Author(s):  
D. E. De Vos ◽  
P. P. Knops-gerrits ◽  
D. L. Vanoppen ◽  
P. A. Jacobs
Keyword(s):  
Schiff Base ◽  
Chemical Properties ◽  
Schiff Base Complexes ◽  
Physico Chemical

Synthesis, Characterization and Biological Activity of Nitrogen­ Oxygen-Sulfur (NOS) Transition Metal Complexes Derived from Novel S-2,4-dichlorobenzyldithiocarbazate with 5-fluoroisatin

2010 ◽  
Vol 7 (2) ◽  
pp. 67
Author(s):  
Mohd Abdul Fatah Abdul Manan ◽  
Hadariah Bahron ◽  
Karimah Kassim ◽  
Mohd Asrul Hafaz Mohamad ◽  
Syed Nazmi Sayed Mohamad
Keyword(s):  
Bacillus Subtilis ◽  
Schiff Base ◽  
Metal Complexes ◽  
Condensation Reaction ◽  
Schiff Base Complex ◽  
Inhibition Zone ◽  
Azomethine Nitrogen ◽  
Strong Activity ◽  
Chelating Ligand ◽  
Physico Chemical

A novel Schiff base containing nitrogen-oxygen-sulfur (NOS) donor atoms formed from the condensation reaction of S-2,4-dichlorobenzyldithiocarbazate (S-2,4BDTC) with 5-fluroisatin has been synthesized. Complexes of cobalt(II), nickel(II), copper(II), zinc(II) and cadmium(II) with this Schiff base have been prepared and characterized using elemental analysis and various physico-chemical techniques. In the cobalt(II) and nickel(II) complexes the Schiff base behaves as a uninegatively charged tridentate nitrogen-oxygen-sulfur (NOS) chelating ligand, bonding through the azomethine nitrogen, thiolate sulfur and carbonylic oxygen of the isatin moiety. However, in the copper(II), zinc(II) and cadmium(II) complexes the Schiff base behaves as a nitrogen-sulfur (NS) bidentate chelating ligand, bonding through the azomethine nitrogen and thiolate sulfur. The Schiff base and the metal complexes were evaluated with respect to antimicrobial activity, which was performed in relation to two selected pathogenic microbials (Bacillus subtilis and Pseudomonas aeruginosa). It was observed that only the zinc Schiff base complex exhibited strong activity against the Bacillus subtilis bacteria with an inhibition zone of 25 mm. 

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