Synthesis, crystal structure and biological properties of a fluorophore-labelled mixed-ligand copper(II) complex incorporating N-hydroxynaphthalene-1,8-dicarboximide.

The mixed-ligand fluorophore-labelled copper(II) complex aqua[2,4-dioxo-3-azatricyclo[7.3.1.

8-Hydroxyquinoline derived p-halo N4-phenyl substituted thiosemicarbazones: Crystal structures, spectral characterization and in vitro cytotoxic studies of their Co(III), Ni(II) and Cu(II) complexes.

The current paper deals with 8-hydroxyquinoline derived p-halo N4-phenyl substituted thiosemicarbazones, their crystal structures, spectral characterization and in vitro cytotoxic studies of Co(III), Ni(II) and Cu(II) complexes. The molecular structures of the ligands, (E)-4-(4-halophenyl)-1-((8-hydroxyquinoline-2-yl)methylene)thiosemicarbazones (halo = fluoro/chloro/bromo) are determined by single crystal X-ray diffraction method. The crystal structures reveal that the ligands are non-planar and exist in their thioamide tautomeric forms.

One-dimensional copper(II) coordination polymers based on 1,3-bis(pyridin-4-yl)propane and diimine ligands.

Two one-dimensional (1D) coordination polymers (CPs), namely catena-poly[[[aqua(2,2'-bipyridine-κN,N')(nitrato-κO)copper(II)]-μ-1,3-bis(pyridin-4-yl)propane-κN:N'] nitrate], {[Cu(NO)(CHN)(CHN)(HO)]·NO} (1), and catena-poly[[[aqua(nitrato-κO)(1,10-phenanthroline-κN,N')copper(II)]-μ-1,3-bis(pyridin-4-yl)propane-κN:N'] nitrate], {[Cu(NO)(CHN)(CHN)(HO)]·NO} (2), have been synthesized using [Cu(NO)(NN)(HO)]NO, where NN = 2,2'-bipyridine (bpy) or 1,10-phenanthroline (phen), as a linker in a 1:1 molar ratio. The CPs were characterized by elemental analysis, IR spectroscopy, thermogravimetric analysis and single-crystal X-ray structure determination. The 1,3-bis(pyridin-4-yl)propane (dpp) ligand acts as a bridging ligand, leading to the formation of a 1D polymer.

Synthesis, crystal structure and biological properties of a cis-dichloridobis(diimine)copper(II) complex.

The mechanisms of interaction of inorganic complexes with DNA are important in the design and development of new metal-based drug molecules. The limitations of cis-platin have encouraged the design and development of new metal-based target-specific anticancer drugs having reduced side effects. The complex cis-dichloridobis(1,2,5-thiadiazolo[3,4-f][1,10]phenanthroline-κN,N)copper(II), [CuCl(CHNS)], has been synthesized and characterized.

Synthesis, structural characterization and biological properties of phosphorescent iridium(III) complexes.

Two phosphorescent cyclometalated iridium(III)-triptycenyl-1,10-phenanthroline complexes [Ir(ppy)(tpt-phen)] (1) and [Ir(bhq)(tpt-phen)] (2) {ppy=2-phenylpyridine, bhq=Benzo[h]quinoline, tpt-phen=triptycenyl-1,10-phenanthroline} have been synthesized and structurally characterized. The structure of complex 2 has been studied by single crystal X-ray crystallography. The photophysical properties of complexes in a different solvent have also been investigated.

A fluorophore-labelled copper complex: crystal structure, hybrid cyclic water-perchlorate cluster and biological properties.

A fluorophore-labelled copper(II) complex, aquabis(dimethylformamide-κO)(perchlorato-κO)[2-(quinolin-2-yl)-1,3-oxazolo[4,5-f][1,10]phenanthroline]copper(II) perchlorate monohydrate, [Cu(ClO)(CHNO)(CHNO)(HO)]ClO·HO, has been synthesized and characterized. A cyclic hydrogen-bonded water-perchlorate anionic cluster, i.e.

Luminescent Ruthenium(II) Polypyridyl Complexes as Nonviral Carriers for DNA Delivery.

Two new luminescent ruthenium(II) polypyridyl complexes, [Ru(bpy) (tpt-phen)]Cl (1; bpy=2,2'-bipyridine, tpt-phen=triptycenyl-1,10-phenanthroline) and [Ru(phen) (tpt-phen)]Cl (2; phen=1,10-phenanthroline), have been developed as potential nonviral vectors for DNA delivery. Photophysical and electrochemical properties of the complexes have been investigated and corroborated with electronic structure calculations. DNA condensation by these complexes has been investigated by UV/Vis and emission spectroscopy, circular dichroism spectroscopy, atomic force microscopy, dynamic light scattering, confocal microscopy, and electrophoretic mobility studies.

Synthesis, crystal structures and characterization of late first row transition metal complexes derived from benzothiazole core: anti-tuberculosis activity and special emphasis on DNA binding and cleavage property.

Air and moisture stable coordination compounds of late first row transition metals, viz. Co(II), Ni(II), Cu(II) and Zn(II), with a newly designed ligand, 2-(2-benzo[d]thiazol-2-yl)hydrazono)propan-1-ol (LH), were prepared and successfully characterized using various spectro-analytical techniques. The molecular structures of the ligand and nickel complex were unambiguously determined by single-crystal X-ray diffraction method.

Design, synthesis and DNA binding activities of late first row transition metal(II) complexes of bi- functional tri - and tetratopic imines.

A series of novel Co(II), Ni(II), Cu(II) and Zn(II) complexes of tri and tetratopic hydrazones have been prepared. Ligands L(1)H(2) and L(2)H(2) were synthesized by the condensation of 2-formylphenoxyacetic acid with 2-hydrazinobenzothiazole and 2-hydroxy-3-hydrazinebenzopyrazine, respectively. The prepared complexes were characterized by the analytical and spectral techniques.

Phenoxide bridged tetranuclear Co(II), Ni(II), Cu(II) and Zn(II) complexes: electrochemical, magnetic and antimicrobial studies.

Phenoxide bridged later first row transition metal(II) complexes have been prepared by the interaction of later 3d transition metal(II) chlorides with tetranucleating compartmental Schiff base ligand system derived from 2,6-diformyl-4-methylphenol, p-phenylenediamine and 2-hydrazinobenzothiazole. Ligand and complexes were characterized by analytical, spectral (IR, UV-visible, ESR, FAB-mass and fluorescence), magnetic and thermal studies. All complexes are found to have octahedral geometry.

Anticonvulsant activity and toxicity evaluation of Cu(II) and Zn(II) metal complexes derived from triazole-quinoline ligands.

A novel Cu(II) and Zn(II) complexes of triazolo-quinoline derivatives were synthesized by in situ method and were characterized by the spectro-analytical methods and their pharmacological properties were evaluated. The compound C3 has exhibited promising anticonvulsant activity towards the electroshock induced seizures in Wistar rats and possesses low toxicity, providing a high safety profile.

Metal-pyrazolyl diazine interaction: synthesis, structure and electrochemistry of binuclear transition metal(II) complexes derived from an 'end-off' compartmental Schiff base ligand.

Pyrazolyl diazine (mu-NN) bridged late first row transition metal(II) complexes have been prepared by the interaction of metal(II) chlorides with an 'end-off' compartmental Schiff base ligand. The ligand system has a strong diazine bridging component and obtained as a condensation product between 1H-pyrazole-3,5-dicarbohydrazide and 3-acetylcoumarin in absolute ethanol. All synthesized compounds are characterized on the basis of various spectral and analytical techniques.

Synthesis and spectroscopy of Co(II), Ni(II), Cu(II) and Zn(II) complexes derived from 3,5-disubstituted-1H-pyrazole derivative: a special emphasis on DNA binding and cleavage studies.

A series of novel Co(II), Ni(II), Cu(II) and Zn(II) complexes of 1H-pyrazole-3,5-dicarboxylic(2'-hydroxy-3'-hydrazinequinoxaline) has been prepared and characterized by the spectral and analytical techniques. Cu(II) ion reacts with the ligand LH(3) and forms the complex in one compartment of the ligand whereas, the other compartment remains free. In Co(II), Ni(II) and Zn(II) complexes both compartments of LH(3) are involved in the coordination.

Synthesis and spectroscopic characterization of cationic mononuclear oxovanadium(IV) complexes with tetradentate Schiff bases as ligands.

New tetradentate Schiff-base oxovanadium(IV) complexes [VOL']SO4 (where L' = tetradentate ligands derived from 2,4-dihydroxy 5-acetyl acetophenone and substituted diamines) were prepared and characterized by physico-chemical techniques. All the complexes are monomeric in nature and a square-pyramidal geometry is proposed. Various ligand-field and molecular-orbital parameters have been calculated.

The stereochemical diversity of a new SNONS binucleating ligand towards 3d metal ions.

A new binucleating ligand containing phenoxide as an endogenous bridging group, 2,6-diformyl-p-cresol bis(2-furanthiocarboxyhydrazone) and its binuclear Co(II), Ni(II), Cu(II) and Zn(II) complexes with chloride ion as an exogenous bridge, have been obtained. The complexes were characterized by elemental analysis, molar conductivities, magnetic moment measurements at room temperature, electronic, IR, 1H-NMR, EPR, FAB spectral studies and thermal data. The copper complex assumes a tetranuclear structure composed of two binuclear units related by a center of symmetry.