Digital Filtering of Weakly Structured UV/VIS Spectra of Inorganic Compounds

Myrczek, Jozef

doi:10.1080/00387019008054478

Cited by 65 publications

(13 citation statements)

References 11 publications

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“…Reflectance spectra for (1), (2) and phenytoin (L) (5000-50000 cm -1 ) were measured on a Cary 500 Scan (Varian) UV-vis-NIR spectrophotometer. To obtain accurate band positions, the spectra were analyzed using variable digital filter method [14,15] with the following parameters: a real number determining the degree of resolution enhancement, a = 200.0; the integer number determining the filter width, N = 10; the increment between points (step) = 100 cm -1 . Magnetic moments were measured using an MSB-MKI instrument (Sherwood Scientific Ltd.) at ambient temperature with Co[Hg(SCN)4] as the standard.…”

Section: Physical Measurementsmentioning

confidence: 99%

Interaction of hydantoins with transition metal ions: synthesis, structural, spectroscopic, thermal and magnetic properties of [M(H2O)4(phenytoinate)2] M = Ni(II), Co(II)

et al. 2009

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Complexes of Ni(II) and Co(II) of the formulae [Ni(H 2 O) 4 (pht) 2 ] (1) and [Co(H 2 O) 4 (pht) 2 ]Á1,5NH 3 ÁH 2 O (2) (where pht = phenotoinate anion) were obtained and characterized physicochemically. [Ni(H 2 O) 4 (pht) 2 ](1) crystallizes in a monoclinic space group P2 1 /c; a = 11.7358(8), b = 11,1250(8), 11.4182(7) Å ; b = 97.076(5)°; V = 1479.41 Å 3 ; Z = 2. The environment around the nickel and cobalt ions can be described as a distorted octahedron. The metal ion was found to bind to four water molecules and two nitrogen atoms derived from two anions of the monodentate phenytoinate. Four intramolecular hydrogen bonds designated as S(6) graph set are found in one [Ni(H 2 O) 4 (pht) 2 ] (1) molecule. Two chain HB patterns, constructed by the [Ni(H 2 O) 4 (pht) 2 ] molecules extending along the c and b axes, respectively, have been observed. The cobalt complex precipitates with the additional solvent molecules: one and a half of ammonia and one water. The results document the preferential binding of hydantoins to the metal ions through N(3) atom.

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Section: Physical Measurementsmentioning

confidence: 99%

Interaction of hydantoins with transition metal ions: synthesis, structural, spectroscopic, thermal and magnetic properties of [M(H2O)4(phenytoinate)2] M = Ni(II), Co(II)

et al. 2009

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“…The solution absorption spectra in methanol were recorded for c = 1 9 10 -3 M. The scans of all spectra were accumulated with resolution of 10 cm -1 . In order to obtain the values of the band number and positions, the variable digital filter analysis has been performed [24][25][26]. Additionally, the solution spectrum was deconvoluted into Gaussian band components [27][28][29][30].…”

Section: Physical Measurementsmentioning

confidence: 99%

Electronic spectra and crystal structure of dinuclear Cu(II) ‘paddle wheel’ acetate complex containing axially coordinated 3-methyl-4-nitropyridine-N-oxide

et al. 2009

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This article presents the electronic spectral characteristics enhanced with the structural, IR and magnetic data of the copper(II) acetate complex with 3-methyl-4-nitropyridine-N-oxide. The complex of the formula, [Cu 2 (OAc) 4 (3-mnpn) 2 ], belongs to the group of the 'paddle wheel' type species with a very short (2.58 Å ) metalmetal distance. In the electronic spectra, new bands were found at 16,000 and 24,000 cm -1 , which have been tentatively assigned to the metal-metal interactions and solid state effects, respectively. The complex show fast kinetic exchange of the apical ligand, i.e. 3-methyl-4-nitropyridine-N-oxide.

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“…The spectra were recorded in the following conditions: (a) diffuse-reflectance spectrum with identical parameters as a baseline of a white sample (reference); (b) absorption spectrum in formamide solution (c = 5 9 10 -3 M). In order to obtain the approximate values for the band position, the spectral analysis was performed using the variable digital filter method [15][16][17][18][19]. For exact values of the band positions, intensities (absorption spectra), and half-widths, the spectra have been deconvoluted into Gaussian components using a modification of non-linear least squares algorithm [20][21][22].…”

Section: Methodsmentioning

confidence: 99%

Monodentate coordinated chromate(VI) ion in [Cu(phen)2OCrO3](phen)0.5·4H2O completing the square pyramidal geometry of the copper(II) in the solid state

et al. 2009

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Novel copper(II) complex of the formula [Cu(phen) 2 OCrO 3 ](phen) 0.5 Á4H 2 O (1) (phen = 1,10-phenantroline) was prepared in the crystalline form and characterized by X-ray diffraction and spectroscopic methods (IR-FIR, NIR-Vis-UV, EPR). In the solid state, the CuN 4 O chromophore adopts a slightly distorted square-pyramidal geometry around the Cu 2? ion with a magnitude of a distortion parameter s = 0.14. The chromate unit in (1) was found to be a monodentate.

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Digital Filtering of Weakly Structured UV/VIS Spectra of Inorganic Compounds

Cited by 65 publications

References 11 publications

Interaction of hydantoins with transition metal ions: synthesis, structural, spectroscopic, thermal and magnetic properties of [M(H2O)4(phenytoinate)2] M = Ni(II), Co(II)

Interaction of hydantoins with transition metal ions: synthesis, structural, spectroscopic, thermal and magnetic properties of [M(H2O)4(phenytoinate)2] M = Ni(II), Co(II)

Electronic spectra and crystal structure of dinuclear Cu(II) ‘paddle wheel’ acetate complex containing axially coordinated 3-methyl-4-nitropyridine-N-oxide

Monodentate coordinated chromate(VI) ion in [Cu(phen)2OCrO3](phen)0.5·4H2O completing the square pyramidal geometry of the copper(II) in the solid state

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