Vol. 8 & Issue 2 ; Section A : Chemical Sciences

Date : Feb .2018 to April 2018

 

Synthesis, characterization and catalytic activity of magnetic and fluorescent methylmethacrylate based random copolymer

S. Luna Eunice, B. Meenarathi, R. Anbarasan,

JCBPS; Section A; February 2018 – April - 2018, Vol. 8, No.2; 121-134.

[DOI: 10.24214/jcbps.A.8.2.12134.]

  • Abstract

    In the present investigation a novel magnetic and fluorescent random copolymer nanocomposite based on poly (methylmethacrylate) (PMMA) was synthesized by a three step process through an emulsion technique. Thus synthesized random copolymer nanocomposite is characterized by analytical techniques like FTIR and 1H-NMR spectra to confirm the chemical structure of the copolymeric materials. The DSC results declared that the Tg of the random copolymer nanocomposite increased by increasing the % weight loading of the magnetic fluorescent nanohybrid. The Mw of the nanocomposite increased due to the chemical grafting of magnetic nanohybrid onto the random copolymer backbone. Due to the encapsulation effect the magnetic moment value of the nanocomposite was found to be decreased. The catalytic activity of the random copolymer nanocomposite was tested towards the reduction of p-nitrophenol (NiP).

Synthesis, Characterization And Biological Studies of Schiff Bases Derived From Vanillin And Their Complexes With Cobalt (II).

Abduljleel Mohammed Abduljleel, Jasim Alshawi, Maitham Najim Aboud,

JCBPS; Section A; February 2018 – April - 2018, Vol. 8, No.2; 135-153.

[DOI: 10.24214/jcbps.A.8.2.13553.]

  • Abstract

    Three new Schiff base ligands derived from Vanillin and diamine compounds (ethane-1,2-diamine, propane-1,3-diamine, butane-1,4-diamine) have been synthesized. These ligands were treated with Co(II) chloride with a metal : ligand ratio equal to 1:1 to afford the three new complexes [CoL1(H2O)2]Cl2, [CoL2(H2O)2]Cl2 and [CoL3(H2O)2]Cl2. Ligands and complexes have been characterized by many techniques like IR, NMR, UV visible absorption, Atomic absorption, molar conductance, molecular weight determination and magnetic measurements. The data shows that the ligands are bidentate and linked to azomethine from nitrogen sites. The complexes are suggested as electrolytes paramagnetic compounds and the coordination number equal to four. The ligands and metal complexes were screened for their antimicrobial activities against gram positive bacteria and gram negative bacteria. They founded active biologically.

Regioselective synthesis and biological activity of novel β,β'-diaminoalcohols

Lassaad Wechtati , Ali Meznib, Moufida Romdhani Younes ,

JCBPS; Section A; February 2018 – April - 2018, Vol. 8, No.2; 154-164

[DOI: 10.24214/jcbps.A.8.2.015464.]

  • Abstract

    A highly effective and mild protocol for ring opening of epoxides with ethylenediamine in one step avoiding the use of expensive catalysts under solvent-free conditions is described. A variety of β,β'-diamino alcohols were obtained in high yields with excellent regiospecifity and in short reaction times. All the title compounds were screened for their antioxidant activity by β, β'-diaminoalcohols, hydroxyl radical, reducing power and ferrous ion chelating (FIC) methods and they showed promising antioxidant activity.

Identification of Polymers with Differential Scanning Calorimetry

Hemlata Raikwar and Anita Chouwey,

JCBPS; Section A; February 2018 – April 2018, Vol. 8, No. 2; 165-170.

[DOI: 10.24214/jcbps.A.8.2.016570.]

  • Abstract

    Differential Scanning Calorimetry, commonly known as DSC, is a thermo analytical technique for polymeric and non- metallic materials. There are many application of differential scanning calorimetry such as, Measurement of plastic or glassy material glass transition temperatures or softing temperatures, which change depend upon the temperature history of the polymers or the amount and type of fill material among other effect. Determines crystalline to amorphous transition temperatures in polymers and plastics and the energies for inorganic compound. Differential Scanning Calorimetric is one of the most efficient and cost effective polymer test methods available. Differential scanning calorimetric can be used to study the melting of a crystalline polymer or the glass transition.