UV–vis, IR and 1H NMR spectroscopic studies of some Schiff bases derivatives of 4-aminoantipyrine

Issa, R. M.; Khedr, Abdalla M.; Rizk, Hala F.

doi:10.1016/j.saa.2005.01.026

Cited by 134 publications

(44 citation statements)

References 35 publications

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“…The bands at 276-300 nm were assigned to p ? p * intra ligand transitions that were localised on the conjugated system of the aromatic moieties [50][51][52]. The other absorption bands observed in the region of 340-357 nm were assigned to the p ?…”

Section: Electronic Spectra Of Copper(ii) Complexes (2a-8a)mentioning

confidence: 96%

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

198

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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: Electronic Spectra Of Copper(ii) Complexes (2a-8a)mentioning

confidence: 96%

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

198

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“…UV-visible spectroscopy is known to be a very sensitive method for studying tautomeric equilibrium in Schiff bases. The two long-wavelength bands observed in the electronic spectra of the compounds are assigned to the OH-and NH-forms [63][64][65][66][68][69][70]. The bands at ca.…”

Section: Uv-visible Spectramentioning

confidence: 95%

“…The longer wavelength bands over ca. 400 nm can be assigned to the intramolecular charge transfer interactions [62][63][64][65][66][67]. UV-visible spectroscopy is known to be a very sensitive method for studying tautomeric equilibrium in Schiff bases.…”

Section: Uv-visible Spectramentioning

confidence: 99%

<b>Synthesis, spectral characterizations and antimicrobial activity of some Schiff bases of 4-chloro-2-aminophenol</b>

Çınarli¹,

Gürbüz²,

Tavman³

et al. 2011

Bull. Chem. Soc. Eth.

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ABSTRACT ABSTRACT. A series of 4-chloro-2-[(arylmethylidene)amino]phenols (1-11) including methoxy group were synthesized using appropriate synthetic route. The structures of the Schiff bases were characterized by FT-IR, UV-Vis, ESI-MS, 1 H and 13 C-NMR spectroscopic techniques and analytical methods. A relation is observed between melting points and existence of intramolecular hydrogen bonding. IR spectra of the compounds including and not including hydrogen bonding were compared. The compounds 2 and 4 show the characteristic UV bands attributed to the NH-forms. According to the 1 H-NMR spectral data the compound 2 has the strongest intramolecular hydrogen bonding and the compound 6 shows two isomeric structure. On the other hand, antibacterial and antifungal activities of the compounds were investigated. Most of the compounds show selective activity toward S. epidermidis and C. albicans. KEY WORDS KEY WORDS KEY WORDS

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“…The extraction methods used for metal determination in vegetable oils A Schiff base has been suggested for the extraction of metals from oils as an appropriate chelating agent under the optimum extraction conditions (Köse Baran & Bağdat Yaşar, 2010). In recent analytical applications, Schiff bases have been used in order to form complexes due to their good complexing capacity with metals (Afkhami et al, 2009;Ashkenani et al, 2009;Ghaedi et al, 2009;Khedr et al, 2005;Khorrami et al, 2004;Köse Baran & Bağdat Yaşar, 2010;Kurşunlu et al, 2009;Mashhadizadeh et al, 2008;Shamspur et al, 2003;Tantaru et al, 2002;Ziyadanoğulları et al, 2008). The chemists have attended to the Schiff bases and their metal complexes because of their widespread applications in biological systems and industrial uses (Issa et al, 2005;İspir, 2009;Kurtaran et al, 2005;Li et al, 2007;Mohamed, 2006;Neelakantan et al, 2008;Prashanthi et al, 2008;Sharaby, 2007).…”

Section: Extractionmentioning

confidence: 99%

Metal Determinations in Olive Oil

Yaşar¹,

Baran²,

Alkan³

2012

Olive Oil - Constituents, Quality, Health Properties and Bioconversions

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UV–vis, IR and 1H NMR spectroscopic studies of some Schiff bases derivatives of 4-aminoantipyrine

Cited by 134 publications

References 35 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

<b>Synthesis, spectral characterizations and antimicrobial activity of some Schiff bases of 4-chloro-2-aminophenol</b>

Metal Determinations in Olive Oil

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