Showing papers in "Polyhedron in 2003"

TL;DR: In this article, the authors analyzed the properties of 2% tungsten oxide doped titania films and showed that they were the most effective photocatalysts for photocatalysis.

TL;DR: In this paper, the synthesis and physical properties of three single-molecule magnets (SMMs) with the composition [Ni(hmp)(ROH)Cl]4, where R is the monoanion of 2-hydroxymethylpyridine.

TL;DR: In this article, the terdentate nature of the ligand is inferred from the IR spectra and spin Hamiltonian parameters of the compounds were calculated from the EPR spectra.

TL;DR: In this paper, a single-component MMA polymerization catalysts in THF, DME, toluene and n-hexane were determined by single-crystal X-ray diffraction.

TL;DR: In this paper, the authors analyzed the magneto-structural correlations of carboxylato bridged copper(II) complexes and concluded that the parameter that governs the magnetic interaction between metal centres is the relative position of the carboxyato bridge of the malonate relative to the copper ions: equatorial−equatorial (strong interaction), equatorial-apical (weak interaction), and apical− apical (negligible interaction).

TL;DR: Lead(II) carboxylate soaps of two fatty acids, palmitic (C15H31COOH) and stearic acids (C17H35COOHL) have been synthesized and characterised by FTIR spectroscopy as discussed by the authors.

TL;DR: The properties of these hexacoordinate complexes, such as electronic absorption, circular dichroism spectra, and 1H NMR spectra have been determined by X-ray structure analysis.

TL;DR: In this article, the role of poly(pyrazolyl)borate ligands in determining crystal packing arrangement was analyzed statistically and with respect to their role in determining the crystal packing arrangements.

TL;DR: In this article, the mononuclear copper(II) complexes, [CuL1]-ClO4] (1) with unsymmetrical quadridentate Schiff base ligands derived from the 1:1:1 condensation of 2,4-pentanedione, pyridine-2-carboxaldehyde and 1,2-ethanediamine (HL1) or 1,3-propanediamine(HL2) have been prepared and characterised.

TL;DR: In this paper, the synthesis and magnetic properties of three Mn4 single-molecule magnets are reported and the fact that these complexes are SMMs has been confirmed by the observation of hysteresis in the plot of magnetization versus magnetic field measured for single crystals of complexes 3 and 4.

TL;DR: In this article, a method for the calculation of second-order anisotropy parameters of single molecular magnets from the single particle orbitals is reviewed, which combines this method with density functional calculations to predict the magnetic anisotropic parameters of several single molecule magnets: Mn 12 -acetate, Mn 10, Co 4, Fe 4, Cr 1 and V 15.

TL;DR: In this paper, the authors show how the design of one-, two-and three-dimensional materials can strongly benefit from the use of crystal engineering techniques, which can give rise to structures of different shapes, and how these differences can give up to different properties.

TL;DR: In this paper, the crystal structures of [Ni(Am4DM)(OAc)], Ni(Am 4DM), [Ni4DM), Ni4DM, Ni5DM, [Ni5DM], [Ni6DM], Ni3CN], Ni2H2O4, [Cu4DM] and [Pt 4DM]-Cl·2H 2O are described.

TL;DR: In this paper, the structures of six N, N ′-polymethylene-bis(salicylaldiminato)copper(II) Schiff base complexes with alkyl backbones ranging from two to eight carbons have been determined by X-ray crystallography.

TL;DR: In this paper, the nutritional supplement chromium picolinate (Cr(pic)3) was found to increase urinary and cellular 8-OHdG levels in a time dependent fashion and significantly increase lipid peroxidation in vivo.

TL;DR: In this article, a series of bimetallic oxides are constructed from octamolybdate clusters linked through copper-ligand subunits, while 3·2H2O exhibits fused octamolebdate building blocks in a two-dimensional molyb date chain.

TL;DR: The X-ray crystal structures of the title complexes showed that the differences between the U-O and Ln-O distances reflect the variation in the ionic radii of the trivalent uranium and lanthanide ions while the UI bond lengths are smaller than those predicted from a purely ionic bonding model as mentioned in this paper.

TL;DR: In this paper, two polymeric complexes, [Nd2(bdc)2(Hbdc), 2(H2O)]n·nH 2O (1) and [nd2[bdc]3(phen), were synthesized and characterized by IR spectra, TGA and X-ray crystallography.

TL;DR: In this paper, the atmospheric pressure chemical vapour deposition reaction of W(CO)(6), WOCl4 or WCl6 with HS(CH2)(2)SH or HSC(CH3)(3) at 350-600degreesC leads to thin films of WS2 on glass substrates.

TL;DR: In this paper, 19 dioxovanadium(V) complexes with unsymmetrical tridentate Schiff base ligands, obtained by a single condensation of 2-methyl-1,2-diaminopropane or N-methyl, 1,2diaminoethane with salicylaldehyde and its derivatives, 2-hydroxy-1-naphthaldehyde, 2hydroxyacetophenone, 1-hydroxyphenolato-κO-dioxomanadium, were prepared.

TL;DR: In this article, two ligands occupied the equatorial plane of each tetragonally elongated octahedral Cu2+ coordination sphere, chelating through the pyridine nitrogen and one oxygen of the deprotonated 2-carboxylic acid group.

TL;DR: A series of cadmium(II) complexes with N -alkyl or aryl and N,N?-dialkyl or diaryl thioureas (RNHCSNHR?; where R � /R?� / CH3,C H 2CH3,C 6H5 and or R?� /H) have been synthesised and characterised.

TL;DR: In this paper, the X-ray structure of [Cu(HBnz2)Cl]·H2O (5) showed the complex is monomeric and the copper atom is four coordinated in a distorted square planar geometry.

TL;DR: In the presence of KOBut, 1-(9-anthracenylmethyl)-3-ethylimidazolium iodide (1) is treated with PdCl2 and Pt(cod)Cl2 in acetonitrile and THF to afford the luminescent complexes as mentioned in this paper.

TL;DR: Two new mixed valent clusters of manganese have been synthesised in which the starting pseudochalcogenide ligand, dicyanonitrosomethanide, (ONC(CN) 2 −, (dcnm − )) undergoes nucleophilic addition of methanol in complex 1 and water in complex 2 during coordination to the metal ions as mentioned in this paper.

TL;DR: A series of ruthenium(II) complexes of potentially NNS tridentate but functionally NS bidentate chelating ligands in the form of 4-substituted 4-phenyl and 4-cyclohexyl thiosemicarbazones of pyridine 2-aldehyde and thiophene 2 -aldehyde (LH) have been synthesized using Ru(PPh3)3Cl2 as the starting material as mentioned in this paper.

TL;DR: In this paper, the crystal structures of 5-methyl-2-hydroxyacetophenone N(4)-dimethylthiosemicarbazone and a representative binuclear copper(II) complex have been acquired, and their structural features are compared to related thiosemics.

TL;DR: The triclinic modification of MgPc(H 2 O) was shown to have a broad absorption band in the N 4 -isoindole plane of the distorted Pc rings.

TL;DR: In this article, the preparation of six complexes of Ni(II) and their study by spectroscopy and X-ray diffraction is described. But the structures of these complexes are unknown.

TL;DR: The structure of 1-ethyl-2-(naphthyl-α-azo)imidazolium hexaflurophosphate has been confirmed by single crystal X-ray structure study and shows supramolecular geometry through non-covalent interactions as mentioned in this paper.