Dinuclear versus tetranuclear cluster formation in zinc(II) nitrate/di-2-pyridyl ketone chemistry: synthetic, structural and spectroscopic studies

Katsoulakou, Eugenia; Bekiari, Vlasoula; Raptopoulou, Catherine P.; Terzis, Aris; Lianos, Panagiotis; Manessi‐Zoupa, Evy; Perlepes, Spyros P.

doi:10.1016/j.saa.2004.11.065

Cited by 47 publications

(32 citation statements)

References 47 publications

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“…As reported by Kapoor et al the negative shift with the splitting indicates the O-coordination of the carbonyl group to Dy(III) ion [7,18]. Coordination via the carbonyl oxygen atom is further confirmed by the medium intensity band observed at 416 cm À 1 which may be due to ν(Dy-O) [24], Fig. 2i…”

Section: Infrared Spectroscopy Analysissupporting

confidence: 63%

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Synthesis and luminescent spectroscopy of lanthanide complexes with dimethylpyridine-2,6-dicarboxylate (dmpc)

Taha

Ajlouni

Hijazi

et al. 2015

Journal of Luminescence

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Section: Infrared Spectroscopy Analysissupporting

confidence: 63%

“…2i-b [24,31]. The two absorption bands observed at 1448 and 1439 cm À 1 in the IR of the dmpc may be assigned to δ(CH 3 ) [6].…”

Section: Compoundsmentioning

confidence: 89%

Synthesis and luminescent spectroscopy of lanthanide complexes with dimethylpyridine-2,6-dicarboxylate (dmpc)

Taha

Ajlouni

Hijazi

et al. 2015

Journal of Luminescence

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“…The difference between the two high bands (ν 5 -ν 1 ) was 85 cm -1 indicating that the nitrate ion bonded to the copper(II) ion in an unidentate manner. [30][31][32] In the case of sulphate complexes 2 and 6, new bands appeared at 1258, 1143, 1112 and 984 cm -1 , and at 1192, 1058 and 962 cm -1 for the two complexes, respectively. The bands of the first complex 2 indicated that the sulphates were coordinated to the vanadyl(II) ion in a chelating bidentate fahion, 30,33 while the bands of complex 6 indicated that the sulphates were coordinated to the copper(II) ion in a chelating unidentate fahion.…”

Section: Infrared Spectramentioning

confidence: 99%

Metal complexes of N'-(2-hydroxy-5-phenyldiazenyl) benzylideneisonicotinohydrazide: Synthesis, spectroscopic characterization and antimicrobial activity

El‐Tabl

Shakdofa

2013

JSCS

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A new series of Cu(II), Ni(II), Co(II), Mn(II), Zn(II), Cd(II), Hg(II) , VO(II), UO2(II) , Fe(III) and Ru(III) complexes of N'-(2-hydroxy-5- phenyldiazenyl)benzylideneisonicotinohydrazide(H2L) have been synthesized and characterized by elemental,1H-NMR, IR, UV-Vis., ESR, magnetic, thermogravimetric analyses(TG) and conductivity measurements. The spectral data show that, the ligand behaves as a neutral bidentate, (2), (4), (5), (6) and (14), monobasic bidentate, (3), (7), (8), (9) and (10), monobasic tridentate (11) and (16) or dibasic tridentate (12), (13) and (15) bonded to metal ions via the carbonyl oxygen atom in ketonic or enolic form, azomethine nitrogen atom and/or deprotonated phenolic hydroxyl oxygen. The ESR spectrum of solid vanadyl(II), complex (2) shows axially anisotropic spectrum with eight lines in the low field region and g?>g||, A||>>A?relationship, which is characteristics of distorted octahedral structure with dxy ground state. However, copper(II) complexes (4), (5) and (6) and manganese(II) complex (10) show an isotropic type while the copper(II) complexes (3) and (7)show an axial symmetry type with g||>g?>ge indicating a covalent bond character. The antibacterial and antifungal activities of the ligand and its metal complexes show mild activity compared with standard drugs (Tetracycline for bacteria and amphotricene B for fungi)

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“…The IR spectra of the nitrate complexes 4, 7, 10, 15 and 17 showed bands in the υ 5 (1455-1481), υ 1 (1363-1385) and υ 2 (944-970) ranges indicating the nitrate group coordinated to the metal ion. The differences between the two high bands (υ 5 −υ 1 ) are in the 79-96 cm −1 indicating that, the nitrate ion bonded to the metal ion is unidentate manner [25,32,34,35]. In all complexes there are a broad bands appeared in the range 3400-3448 cm −1 assigned to water molecules [36,37].…”

Section: Ir Spectramentioning

confidence: 94%

Coordination behaviour of N′¹,N′⁴-bis((1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)methylene) succinohydrazide toward transition metal ions and their antimicrobial activities

Saied

Shakdofa

Tabl

et al. 2014

Main Group Chemistry

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Complexes of Cu(II), Ni(II), Co(II), Mn(II), Zn(II) and Fe(III) with N 1 ,N 4 -bis((1,5-dimethyl-3-oxo-2-phenyl-2,3dihydro-1H-pyrazol-4-yl)methylene) succinohydrazide are reported and characterized using various analytical and spectroscopic techniques like 1 H NMR-, mass-, IR-, ESR-, UV-Vis. spectra, magnetic moment and molar conductivity measurements as well as elemental and thermal analyses. The ligand behaves as a dibasic hexadentate N 2 O 4 bonded covalency via the enolic carbonyl oxygen of hydrazide moiety and coordeinated via carbonyl oxygen of antipyrine moiety and azomethine nitrogen atoms. Based on magnetic and electronic spectra data a distorted octahedral geometry around the metal ions has been proposed. The ESR spectrum of copper(II) complexes (3) showed axial symmetry with g >g⊥>g e , indicating a distorted octahedral structure and presence of the unpaired electron in d (x2-y2) orbital. The antimicrobial activities results of the metal complexes 2, 3, 4, 5, 8, 11, 13 and 16 show that, all these complexes exhibit moderate to mild inhibitory effects aganist Bacillus subtilis, Escherichia Coli and Aspergillus niger while the parent ligand is inactive. This enhancement may be attrubied to their structures which possess an additional C=N bond. Moreover, coordination reduces the polarity of the metal ion mainly because of the partial sharing of its positive charge with the donor atom within the chelate ring system, which formed during the coordination. This process, in turn, increases the lipophilic nature of the central metal atom, which favors its permeation more efficiently through the lipid layer of the microorganism thus destroying them more aggressively.

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Dinuclear versus tetranuclear cluster formation in zinc(II) nitrate/di-2-pyridyl ketone chemistry: synthetic, structural and spectroscopic studies

Cited by 47 publications

References 47 publications

Synthesis and luminescent spectroscopy of lanthanide complexes with dimethylpyridine-2,6-dicarboxylate (dmpc)

Synthesis and luminescent spectroscopy of lanthanide complexes with dimethylpyridine-2,6-dicarboxylate (dmpc)

Metal complexes of N'-(2-hydroxy-5-phenyldiazenyl) benzylideneisonicotinohydrazide: Synthesis, spectroscopic characterization and antimicrobial activity

Coordination behaviour of N′¹,N′⁴-bis((1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)methylene) succinohydrazide toward transition metal ions and their antimicrobial activities

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Dinuclear versus tetranuclear cluster formation in zinc(II) nitrate/di-2-pyridyl ketone chemistry: synthetic, structural and spectroscopic studies

Cited by 47 publications

References 47 publications

Synthesis and luminescent spectroscopy of lanthanide complexes with dimethylpyridine-2,6-dicarboxylate (dmpc)

Synthesis and luminescent spectroscopy of lanthanide complexes with dimethylpyridine-2,6-dicarboxylate (dmpc)

Metal complexes of N'-(2-hydroxy-5-phenyldiazenyl) benzylideneisonicotinohydrazide: Synthesis, spectroscopic characterization and antimicrobial activity

Coordination behaviour of N′1,N′4-bis((1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)methylene) succinohydrazide toward transition metal ions and their antimicrobial activities

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Coordination behaviour of N′¹,N′⁴-bis((1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)methylene) succinohydrazide toward transition metal ions and their antimicrobial activities