Complexation behavior of Schiff base toward transition metal ions

Bensaber, Salah M; Maihub, A. A.; Hudere, S.S.; El-ajaily, M. M.

doi:10.1016/j.microc.2005.03.001

Cited by 65 publications

(44 citation statements)

References 3 publications

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“…The broadness of the m OH band at ca. 3450 cm À1 may be attributed to the intramolecular hydrogen bond between CH@N (imine nitrogen) and OH (phenolic) [37,38]. In all of the compounds, the stretching vibration of the lactam carbonyl was observed as a sharp band in the region of 1690-1650 cm Table 5.…”

Section: CMmentioning

confidence: 92%

Anticancer and antifungal activity of copper(II) complexes of quinolin-2(1H)-one-derived Schiff bases

Creaven

Duff

Egan

et al. 2010

Inorganica Chimica Acta

207

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a b s t r a c tThe condensation of substituted aromatic aldehydes with 7-amino-4-methyl-quinolin-2(1H)-one (1) has lead to the isolation of quinolin-2(1H)-one derived Schiff bases (2-14). The copper(II) complexes (2a-14a) of the ligands were also prepared, and together with their corresponding free ligands were fully characterised by elemental analyses, spectral methods (IR, 1 H and 13 C NMR, AAS, UV-Vis), magnetic and conductance measurements. The bidentate ligands coordinated to the copper(II) ion through the deprotonated phenolic oxygen and the azomethine nitrogen of the ligands in almost all cases. X-ray crystal structures of two of the complexes, 5a and 8a, confirmed the bidentate coordination mode. All of the compounds were investigated for their antimicrobial activities against the fungus, Candida albicans, and against Gram-positive and Gram-negative bacteria. The compounds were found to have excellent antiCandida activity but were inactive against Staphylococcus aureus and Escherichia coli. Selected compounds (2-8 and 2a-8a) were also screened for their in vitro anticancer potential using the human hepatic carcinoma cell line, Hep-G 2 . Several derivatives were shown to be active comparable to that of cisplatin.

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Section: CMmentioning

confidence: 92%

Anticancer and antifungal activity of copper(II) complexes of quinolin-2(1H)-one-derived Schiff bases

Creaven

Duff

Egan

et al. 2010

Inorganica Chimica Acta

207

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“…Upon complexation, the phenolic m C-O stretching vibration shifted to lower frequency, suggesting coordination of this oxygen atom. Several new bands present in the region 400-600 cm À1 in the spectra of the complexes were assigned to m Cu-N and m Cu-O stretching vibrations [52][53][54][55].…”

Section: Ir Spectra Of Cu(ii) Complexesmentioning

confidence: 99%

“…3400 cm À1 was assigned to the m OH stretch. The breadth of this band can be explained as the effect of intramolecular hydrogen bonding between the imine nitrogen and the hydrogen from the ortho-hydroxyl group [52,53]. The UV-vis spectra of the Schiff bases contained hypochromic absorption bands in the ultraviolet region of the spectra corresponding to the p ?…”

Section: Synthesis and Characterisation Of The Schiff Base Ligands (2mentioning

confidence: 99%

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Copper(II) complexes of coumarin-derived Schiff bases and their anti-Candida activity

Creaven

Devereux

Karcz

et al. 2009

Journal of Inorganic Biochemistry

101

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“…The observed results can be due to these paradox effects. Addition of metal ions to the ligand solution cause appearance of new or shifted peaks (red shift) in the spectrum due to the coordination of metal ions with imines nitrogen and phenolic oxygen [41] and lead to formation of ML, ML2 or M2L [42][43][44][45]. The isosbestic points can predict the numbers of equations in solution.…”

Section: Resultsmentioning

confidence: 99%

Spectrophotometric study of complexation between a series of salophens and some transition metal ions in DMF solvent

Shokrollahi¹,

Ghaedi²,

Alipour³

et al. 2011

Eur. J. Chem.

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KEYWORDSThe complexation behaviour of some salophen,s derivatives with few transition and heavy metal cations in N,N'-dimethyl formamid as nonaqueous solvent at 25 o C and 0.05 M tetra ethylammonium perchlorate to investigate the effect of structure were studied by spectrophotometric method. The formation of complexes between ligands and metal ions of the types ML, ML2 or M2L was observed. The overall stability constants of such complexes were evaluated by computer refinement of absorption-mole ratio data using the KINFIT program.

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Complexation behavior of Schiff base toward transition metal ions

Cited by 65 publications

References 3 publications

Anticancer and antifungal activity of copper(II) complexes of quinolin-2(1H)-one-derived Schiff bases

Anticancer and antifungal activity of copper(II) complexes of quinolin-2(1H)-one-derived Schiff bases

Copper(II) complexes of coumarin-derived Schiff bases and their anti-Candida activity

Spectrophotometric study of complexation between a series of salophens and some transition metal ions in DMF solvent

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