The nanocomposite of hard (BaFe12O19)/soft ferrite was prepared, and then the polypyrrole (PPy)–BaFe12O19/Fe3O4 multi core–shell produced by in situ polymerisation method. X-ray diffraction, transmission electron microscope, scanning microscopy fourier transform infrared spectroscopy analysis indicated that Fe3O4 coated on BaFe12O19 homogenously enwrapped PPy coating. magnetic properties electrical conductivity were characterised vibrating sample magnetometer four-wire technique...

Abstract With emergence of electronic systems and removal paper, virtual technologies electronics are becoming important. This paper discusses the importance training emphasizes on its qualitative quantitative development for some organizations or technical science engineering students. The main focus is utilizing grounds based usual network infrastructures such as internet advanced distributed cloud computing environments. Finally, in new environments computing, service composition...

BaxSr1–xFe12O19/Fe3O4/polyacrylic acid (PAA) nanocomposites with multi core-shell structure were successfully synthesized two-step coprecipitation method and one-step masking shell method. The samples characterized by FTIR, X-ray diffraction (XRD), transmission electron microscope (TEM), vibrating sample magnetometer (VSM), radar absorbing material reflectivity far field cross-section method, respectively. XRD TEM results indicated that the obtained nanoparticles have morphology. FTIR...

The one-pot synthesis of a novel class 5-(2-alkoxy-2-phenyl-1-N-phenylthiocarbamoylethenyl)-6-oxo-1,6-dihydropyrazine-2,3-dicarbonitriles (2a–o) is achieved in moderate to good yields by the sequential reaction between 4-benzoyl-5-phenylamino-2,3-dihydrothiophene-2,3-dione, diaminomaleonitrile and alcohols.

Abstract Reactions of ethyl 4-aryl-2,4-dioxobutanoates 1a–c at ambient temperature with diaminomaleonitrile in glacial acetic acid and malononitrile ethanol/H 2 O (1:1) led to the formation 5-(2-aryl-2-oxoethyl)-6-oxo-1,6-dihydropyrazine-2,3-dicarbontrile 2a–c 5-amino-4,6-dicyanobiphenyl-3-carboxylate derivatives 3a–c , respectively.

The silver nanoparticles/polyaniline/reduced graphene oxide nanocomposite modified glassy carbon electrode (Ag/PANI/RGO/GCE) was prepared by the electrochemical method. Ag/PANI/RGO characterized transmission electron microscopy (TEM), field emission scanning (FE-SEM), Raman spectroscopy, X-ray diffraction (XRD), and impedance spectroscopy (ESI). Two techniques namely differential pulse voltammetry (DPV) cyclic (CV) were used to behaviors investigation of ascorbic acid (AA), dopamine (DA),...

Background: A facile, effective and green methodology has been developed for the synthesis of 1,2-dihydropyridine-3,5-dicarbonitriles (3a-h) ethyl 4H-pyran-2-carboxylates (5a-d) through one-pot, two or three-component condensation reactions consisting aromatic aldehydes, malononitrile cyanoacetic acid hydrazide benzoylpyruvate in presence 1,4-diazabicyclo [2.2.2]octane, DABCO, aqueous ethanol at room temperature. This work consistently advantages as high yields, short reaction times, mild...

Abstract Ring closure reactions of diaminomaleonitrile (DAMN) with electrophilic aryl isocyanates and isothiocyanates lead to the formation target 5,5′-diimino-1,1′-diaryl-4,4′-biimidazolidinylidene-2,2′-diones 2a,b 2,2′-diarylimino-4,4′-bithiazolidinylidenes 4a–e , respectively. The protocol provides a new strategy for synthesis wide range alkenes two electron-donating withdrawing substituents DAMN in moderate good yields.