Infrared spectrum of the bis-(1,10-phenanthroline) Cu(I) and Cu(II) perchlorate complexes

Campos‐Vallette, Marcelo; Clavijo, R. E.; Mendizábal, Fernando; Zamudio, Walter; Baraona, Ruth; Díaz, Guillermo

doi:10.1016/0924-2031(96)00012-4

Cited by 59 publications

(29 citation statements)

References 31 publications

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“…In this work as shown in Fig. 2, the infrared spectrum of this complex recorded at 500-4000 cm -1 reveals the ring modes (ν C-C and ν C-N ) of phen at about 3067, 2299-1925, 1510, 1427, 1350 and 1215 cm -1 , and the ring deformation near 725 cm -1 , being quite similar to those observed in chelation of another Cu(II)-phen complex 16 .…”

Section: The Electronic Spectrummentioning

confidence: 54%

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Structural Analysis of Powder Complex of Tris (1,10-phenanthroline) Copper(II) Trifluoromethanesulfonate Dihydrate

Kusumawardani¹,

Permanasari²,

Fatonah³

et al. 2017

Orient. J. Chem

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The powder complex of tris(phenanthroline) copper(II) trifluoromethanesulfonate dihydrate has been synthesized by direct interaction of the corresponding precursors, copper(II) nitrate, phenanthroline, and potassium triflate. The metal content found to be 6.76% corresponds to the theoretical value of 6.77% in [Cu(phen) 3 ](CF 3 SO 3 ) 2 .2H 2 O. The equivalent electrical conductance producing the charge ratio of cation by anion to be 2: 1, should confirm the formula. The magnetic moment, µ eff , of this complex which was to be 1.85-1.90 B.M, indicates that the complex is paramagnetic corresponding to spin-only value for one unpaired electron. UV-Vis spectrum of the complex reveals the only one broad absorption observed at about 681.50 nm (14673.51 cm -1 ), being associated with the spin allowed transition, 2 E g → 2 T 2g . The extinction coefficient of 48 Lmol 1 cm -1 indicates the adoption of octahedral environment in this complex. The infrared spectrum shows absorptions of ligand group which is influenced by the metal-ligand interaction in this complex. The powder XRD of this complex was refined by Le Bail method of Rietica program and found to be fit as triclinic symmetry of space group P1.

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Section: The Electronic Spectrummentioning

confidence: 54%

“…The infrared spectrum In general, the spectral shape of the phen and bipy complexes is quite similar 14 . Thus, the effect of chelation has been reported to shift the absorption bands of the functional group in the two ligands [15][16] . In this work as shown in Fig.…”

Section: The Electronic Spectrummentioning

confidence: 99%

Structural Analysis of Powder Complex of Tris (1,10-phenanthroline) Copper(II) Trifluoromethanesulfonate Dihydrate

Kusumawardani¹,

Permanasari²,

Fatonah³

et al. 2017

Orient. J. Chem

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“…Furthermore, the presence of absorption bands related to the vibrational ring modes (νC-C and νC-N) at ca. 1620, 1505, 1419, 1341, 1293 and 1217 cm -1 and the ring deformation near 765 cm -1 in the spectra of the complexes 20 confirmed the coordination of a, b, and c to the carboxylates.…”

Section: Complex Characterizationmentioning

confidence: 63%

Catalytic Behaviors of CoII and MnII Compounds Bearing α-Diimine Ligands for Oxidative Polymerization or Drying Oils

Lima¹,

Nunes²,

Dantas³

et al. 2017

J. Braz. Chem. Soc.

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The oxidative polymerization of linseed oil was investigated comparing the classical catalysts cobalt(II) 2-ethylhexanoate and manganese(II) 2-ethylhexanoate and their derivatives modified by the presence of chelating nitrogen ligands, i.e., 2,2'-bipyridyl, 2-(acetyl-2,6-diisopropylphenylimine)-pyridine and [N-(2,6-diisopropylphenyl)imine]acenaphthoquinone. The suitable stoichiometries between the two precursor complexes with the three ligands were determined by UV-visible spectroscopy. All complexes were characterized by infrared spectroscopy, and one complex was characterized also by X-ray diffraction. The apparent kinetic constants of oxidative polymerization of linseed oil was determined, for each catalytic system, via the periodic measurements of the oil viscosity during the oxidation reaction. The results indicated that the modifications of the classical two complexes with the chelating nitrogen ligands improved the catalytic efficiency at least to the manganese complex.

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“…The N 3 H tautomer practically dominates the electrode surface, as can be seen not only by the 1,599 cm −1 band, which becomes more intense than the 1,560 cm −1 one, but also by the weak signal at 1,013 cm −1 , which is now enhanced and is accompanied by features at 1,108 and 1,260 cm −1 . The preferential interaction of this species with the metal gives rise to a band at 314 cm −1 , which is assigned to the ν Cu‐N mode . One can notice that the bands at 1,013, 1,108, and 1,260 cm −1 are so enhanced when E varies from −0.8 to −1.2 V that the signals at the ν C4C5 region become too weak.…”

Section: Resultsmentioning

confidence: 89%

On the 4‐methylimidazole behavior at a copper electrode: A view from surface‐enhanced Raman scattering

Silva¹,

Wysard

Bandeira³

et al. 2019

J Raman Spectroscopy

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Surface enhanced raman scattering (SERS) spectra of 4‐methylimidazole (4‐MeImid) are shown for the first time on a copper electrode and in the presence of chloride. The potential dependence on the spectra reveals that the N1H tautomer is majority close to the open circuit, but the N3H tautomer predominates at more cathodic polarizations. At these latter conditions, 4‐MeImid orientation changes from tilted to perpendicular, and such a behavior is similar to the one of Imid at natural pH. Interesting issues are observed at pH = 2.0: (a) 4‐MeImidH+ is not identified on the metal surface for the whole applied potential range and must be either adsorbed as an ion pair with chloride or in the bulk solution; (b) at open circuit and anodic polarization, its neutral form is the unique azole species present, in contrast to the ImidH+ behavior, which is easily observed in the surface spectra.

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Infrared spectrum of the bis-(1,10-phenanthroline) Cu(I) and Cu(II) perchlorate complexes

Cited by 59 publications

References 31 publications

Structural Analysis of Powder Complex of Tris (1,10-phenanthroline) Copper(II) Trifluoromethanesulfonate Dihydrate

Structural Analysis of Powder Complex of Tris (1,10-phenanthroline) Copper(II) Trifluoromethanesulfonate Dihydrate

Catalytic Behaviors of CoII and MnII Compounds Bearing α-Diimine Ligands for Oxidative Polymerization or Drying Oils

On the 4‐methylimidazole behavior at a copper electrode: A view from surface‐enhanced Raman scattering

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