No abstract

Novel jasmine bud-shaped copper nanoparticles were synthesized by a green chemical reduction method using polyvinylpyrrolidone (PVP) as a capping agent, L-ascorbic acid (AA) as a reducing agent as well as antioxidant agent, isonicotinic acid hydrazide (INH) as a reducing agent, and water as a solvent at 60–70°C (pH-7) in the presence of air. The UV-Vis absorption maximum obtained is 573 nm. The crystal lattice (fcc) structure of Cu Nps was confirmed by X-ray diffraction (XRD). The novel jasmine bud shape was visualized in a transmission electron microscope (TEM). The height of single copper nanobud was 6.41 nm as measured by atomic force microscope (AFM). The average particle size 6.95 nm is obtained by XRD results. Antibacterial activity of the Cu nanobuds was evaluated by testing against Gram-negative (Escherichia coli) and Gram-positive (Staphylococcus aureus) bacteria.

No abstract

Three 4′‐(4‐Methylbenzoate‐benzyloxy)‐2,2′:6′,2′′‐terpyridine (MBBtpy), 4′‐(4‐Ethylbenzoate‐benzyloxy)‐2,2′:6′,2′′‐terpyridine (EBBtpy) and 4′‐(5‐(1,3‐Dimethylbenzoate)‐benzyloxy)‐2,2′:6′,2′′‐terpyridine (DMBBtpy) ligands and seven ruthenium(II) symmetrical [Ru(MBBtpy)2](PF6)2 (Ru1), [Ru(EBBtpy)2](PF6)2 (Ru2), [Ru(DMBBtpy)2](PF6)2 (Ru3) and unsymmetrical [Ru(MBBtpy)(EBBtpy)](PF6)2 (Ru4), [Ru(MBBtpy)(ttpy)](PF6)2 (Ru5), [Ru(MBBtpy)(Brttpy)](PF6)2 (Ru6), [Ru(MBBtpy)(HOttpy)](PF6)2 (Ru7) complexes were synthesized and characterized by UV/Vis, Fluorescence, FTIR, 1H & 13C NMR, ESI‐mass spectral studies and electrochemical studies. The crystal structure of HOttpy ligand was determined by single crystal X‐ray diffraction. The cyclic voltammograms of Ru(II) complexes exhibit a quasi‐reversible oxidation peak corresponding to RuII/RuIII process. The peak current Ipa and Ipc increases with increase in scan rate. The Ru(II) complexes tested for in vitro antimicrobial activity against four human pathogens and fungus Candida albicans showed good antibacterial and antifungal activity. The binding of Ru(II) complexes with calf thymus DNA was determined by UV/Vis spectroscopy. The cleavage activity of ruthenium(II) complexes studied by gel electrophoresis indicates that these complexes can cleave pUC19 DNA more efficiently when compared to that of control.

In the title compound, C11H10O3, the prop-2-yn-1-yl group is inclined to the benzene ring by 69 (7)°. In the crystal, molecules are linked by a pair of C—H...O hydrogen bonds, forming inversion dimers with anR22(12) ring motif. The dimers are linked by a second C—H...O hydrogen bond, forming sheets parallel to the (102) plane. The sheets stack along thec-axis direction with a separation ofca3.4 Å.