Preparation and applications of ion exchange membranes by radiation-induced graft copolymerization of polar monomers onto non-polar films

Recent developments in the chemistry of enaminones

Metal-Free Methods in the Synthesis of Macrocyclic Schiff Bases

A facile and versatile approach for the preparation of antifouling and antimicrobial polymer membranes has been developed on the basis of bioinspired polydopamine (PDA) in this work. It is well-known that a tightly adherent PDA layer can be generated over a wide range of material surfaces through a simple dip-coating process in dopamine aqueous solution. The resulting PDA coating is prone to be further surface-tailored and functionalized via secondary treatments because of its robust reactivity. Herein, a typical hydrophobic polypropylene (PP) porous membrane was first coated with a PDA layer and then further modified by poly(N-vinyl pyrrolidone) (PVP) via multiple hydrogen-bonding interactions between PVP and PDA. Data of water contact angle measurements showed that hydrophilicity and wettability of the membranes were significantly improved after introducing PDA and PVP layers. Both permeation fluxes and antifouling properties of the modified membranes were enhanced as evaluated in oil/water emulsion fil...

Antifouling and Antimicrobial Polymer Membranes Based on Bioinspired Polydopamine and Strong Hydrogen-Bonded Poly(N-vinyl pyrrolidone)

Cerium(IV) Ammonium Nitrate as a Catalyst in Organic Synthesis

The chemistry of diaminomaleonitrile and its utility in heterocyclic synthesis

Recent Developments in the Chemistry of Enaminones

Synthesis and spectroscopic characterization of copper(II) complexes with the polydentate chelating ligand 4,4'-[1,4-phenylenedi(nitrilo)dipente-2-one.

Modification of sulfonamid drug using different principles of chemical reactions was investigated. These reactions involve the condensation of an amino group with triethyl orthoformate and dimethylformamide dimethyl acetal. Ability of sulfa to condense with active keto compounds, like ethyl pyruvate and piprazine carboxyaldehye was studied. Alkyation of sulfa with different chloro derivatives was also reported. The structure of the isolated compound was elucidated and confirmed using elemental analysis and spectral data. The bioactivity of the ob-tained compounds was investigated against different gram positive and gram negative bacteria. The study reveals that most of the modified drugs show high to moderate antibacterial activity.

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Abdel-Zaher A. Elassar

Papers

Recent developments in the chemistry of enaminones

The chemistry of diaminomaleonitrile and its utility in heterocyclic synthesis

Recent Developments in the Chemistry of Enaminones

Synthesis and spectroscopic characterization of copper(II) complexes with the polydentate chelating ligand 4,4'-[1,4-phenylenedi(nitrilo)dipente-2-one.

Synthesis, Structure Analysis and Antibacterial Activity of New Potent Sulfonamide Derivatives