REVIEW: A RECENT REVIEW IN APPLICATIONS OF HETEROCYCLIC COMPOUNDS AS ANTIMICROBIAL AGENT

A wide development in the field of multidrug resistance in antimicrobial activity which enhance the search for development of new medicinal drugs with high potential. Schiff base heterocyclic metal complex with imine moiety, act as important antimicrobial agents due to their versatile properties such as chelation, adaptability of fine structure for a specific biological action, and chemotheraptic drugs. Schiff base compounds derived from various heterocyclic platforms have been competently reviewed.Â

Chelators influenced synthesis of chitosan–carboxymethyl cellulose microparticles for controlled drug delivery

Abstract In this study, polyphenolic curcumin is entrapped within microcomposites made of biopolymers chitosan (CS) and carboxymethyl cellulose (CMC) formulated by ionic gelation method. Here, different concentrations of two chelating agents, barium chloride and sodium tripolyphosphate, are used to make microcomposites. Thus, the synthesized microparticles were characterized by FTIR, and their surface morphology was studied by SEM. Drug encapsulation efficiency and the drug release kinetics of CS–CMC composites are also studied. The produced microcomposites were used to study antibacterial activity in vitro

Structural data of DNA binding and molecular docking studies of dihydropyrimidinone transition metal complexes

A series of some novel copper complexes derived from Biginelli condensation of DHPHS. The ligand and its transition metal complexes show more antimicrobial activities which was substantiated by molecular docking studies. Transition metal complexes four possess antioxidant properties supported by the DNA-binding, cleavage, and viscosity measurement (Prasad et al., 2011) [1]. The in Silicon DNA binding reveals copper complex is bound to be Minor groove and other manganese, cobalt, nickel complexes are bound to the Major groove portion of DNA through hydrogen bonds and hence copper (II), manganese (II), cobalt (II), nickel (II) complexes are called Minor groove and Major groove binder respectively. The DNA cleavage studies of metal complexes presented more protruding activity in the attendance of H2O2 associated to that in the absence of H2O2. In continuance of our ongoing research on DNA binding and cleavage happenings of transition metal complexes, in this paper we obtainable the synthesis, characterization and DNA cleavage activities. Keywords: DHPHs, 4-aminoantipyrine, DNA binding, DNA cleavage, Antioxidant, Molecular dockin

A Novel and Facile Methodology for Synthesis of Coumarin Coupled Benzimidazole-2-Thione Compounds

<div><p>GRAPHICAL ABSTRACT</p><p></p></div

Crystal structure determination of two pyridine derivatives: 4-[(E)-2-(4-methoxyphenyl)ethenyl]-1-methylpyridin-1-ium hexafluoro-λ6-phosphane and 4-[(E)-2-[4-(dimethylamino)phenyl]ethenyl]-1-phenyl-1λ5-pyridin-1-ylium hexafluoro-λ6-phosphane

The title molecular salts, C16H16NO+·PF6−, (I), and C21H21N2+·PF6−, (II), are pyridine derivatives. In compound (I), the cation comprises a methyl N-substituted pyridine ring and a methoxy-substituted benzene ring connected by a C=C double bond. The F atoms of the PF6− anion are disordered over two sets of sites with refined occupancy factors of 0.614 (7):0.386 (7). In compound (II), the cation comprises a pyridine ring attached to unsubstituted phenyl ring and a dimethylaniline ring, which are connected by a C=C double bond. The anion is PF6−. In both salts, the cation adopts an E configuration with respect to the C=C bond. The pyridine ring makes a dihedral angle of 9.86 (12)° with the methoxy-substituted benzene ring in compound (I) and 11.2 (3)° with the dimethylamine-substituted benzene ring in compound (II). In compound (I), the crystal packing is stabilized by weak C—H...F intermolecular interactions which result in R43(14) ring motifs, forming molecular sheets running parallel to (\overline{1}03). These are further stabilized by weak P—F...π interactions. In compound (II), the crystal packing is stabilized by C—H...F interactions, which result in R66(40) ring motifs, forming molecular sheets running parallel to (101) and these are further connected by π–π interactions

Enhanced magneto-optical and photocatalytic properties of ferromagnetic Mg1-yNiyFe2O4 (0.0 ≤ y ≤ 1.0) spinel nano-ferrites

Spinel Mg1−yNiyFe2O4 (0.0 ≤ y ≤ 1.0) ferrite magnetic nanoparticles (MNPs) were synthesized by a sol-gel combustion method using urea as the reducing agent/fuel. Powder X-ray diffraction (XRD) analysis revealed the formation of cubic spinel Mg1−yNiyFe2O4 powders and confirmed pure crystalline phase and the average crystalline size of 21.25 to 17.04 nm. Functional group bonds between metal and oxygen (M–O) were confirmed by Fourier transform infrared (FT-IR) spectra. The microstructure of the powders was recorded by high-resolution scanning electron microscope (HR-SEM) and confirmed the particle-like surface morphology with smaller agglomeration, due to the magnetic interaction of the particles. Energy-dispersive X-ray (EDX) results showed the composition of the expected elements and confirmed the phase purity of the products. Vibrating sample magnetometer (VSM) technique recorded at room temperature was used to analyse the magnetic properties of the samples and the hysteresis loops showed the ferromagnetic behaviour. Moreover, the samples Mg1−yNiyFe2O4 NPs were tested for the photocatalytic degradation (PCD) of methylene blue (MB) dye and the sample y = 0.6 showed maximum degradation efficiency (96.83 %), due to the smaller particle size with higher surface area than other compositions. Furthermore, spinel Mg1−yNiyFe2O4 nano-photocatalysts can be reused several times without change of its catalytic activity