Synthesis and fluorescence properties of Eu-anthracene-9-carboxylic acid towards N-acetyl amino acids and nucleotides in different solvents

Azab, Hassan A.; El-Korashy, Sabry A.; Anwar, Zeinab M.; Hussein, Belal H. M.; Khairy, Gasser M.

doi:10.1016/j.saa.2009.09.008

Cited by 49 publications

(24 citation statements)

References 39 publications

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“…e absence of band due to carboxylic OH group in the spectra of all lanthanide (III) complexes suggests the coordination to the metal ion via deprotonation. e band due to (C=O) of carboxylic acid of HL was absent in all the lanthanide(III) complexes, indicating the participation of carbonyl oxygen in coordination to the metal ion [22][23][24]. Whereas the two new characteristic bands appeared on complexation in the ranges of 1590-1562 cm −1 and 1372-1346 cm −1 were assigned to asymmetric and symmetric stretching frequencies of carboxylate ion, respectively.…”

Section: Resultsmentioning

confidence: 99%

2,4‐Dichlorophenoxyacetic Acid Derived Schiff Base and Its Lanthanide(III) Complexes: Synthesis, Characterization, Spectroscopic Studies, and Plant Growth Activity

Naik

Bakale

Pathan

et al. 2012

Journal of Chemistry

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2,4-Dichlorophenoxyacetic acid derived Schiff base (HL) and its lanthanide [La(III), Pr(III), Nd(III), Sm(III), Eu(III), Gd(III), Dy(III), Y(III)] complexes were synthesized and characterized by various spectroscopic ( 1 H, 13 C, DEPT and 2D HMQC NMR, FT-IR, �V-Vis, and mass) techni�ues and other analytical methods. HL exhibits �E� and �� isomerism and was con�rmed by variable temperature 1 H NMR studies. e spectral and analytical data reveals the bidentate coordination of HL to lanthanide(III) ion, through carboxylic acid group via deprotonation. Fluorescence spectrum of europium complex shows bands at 578, 592, and 612 nm assignable to 5 D0 → 7 F0, 5 D0 → 7 F1, and 5 D0 → 7 F2, respectively. Auxin activity of HL and lanthanum(III) complex on wheat seeds (Triticum durum) was measured at different concentrations. e percentage germination, root length, and shoot length were recorded. An enhancement in the plant growth activity of the ligand was observed on complexation and the best activity was observed at 10 −6 M concentration.

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Section: Resultsmentioning

confidence: 99%

2,4‐Dichlorophenoxyacetic Acid Derived Schiff Base and Its Lanthanide(III) Complexes: Synthesis, Characterization, Spectroscopic Studies, and Plant Growth Activity

Naik

Bakale

Pathan

et al. 2012

Journal of Chemistry

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“…The knowledge gained from this study should be useful for the development of potential probes for DNA structure and new therapeutic reagents for tumors. This work is a continuation for the author's work in the field of developing new luminescent probes [22][23][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 74%

Synthesis of Novel Eu(III) Luminescent Probe Based on 9- Acridinecarboxylic Acid Skelton for Sensing of ds-DNA

2011

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Eu(III)-9-acridinecarboxylate (9-ACA) complex was synthesized and characterized by elemental analysis, conductivity measurement, IR spectroscopy, thermal analysis, mass spectroscopy, (1)H-NMR, fluorescence and ultraviolet spectra. The results indicated that the composition of this complex is [Eu(III)-(9-ACA)(2)(NCS)(C(2)H(5)OH)(2)] 2.5 H(2)O and the oxygen of the carbonyl group coordinated to Eu(III). The interaction between the complex with nucleotides guanosine 5'- monophosphate (5'-GMP), adenosine 5'-diphosphates (5'-ADP), inosine (5'-IMP) and CT-DNA was studied by fluorescence spectroscopy. The fluorescence intensity of Eu(III)-9-acridinecarboxylate complex was enhanced with the addition of CT-DNA. The effect of pH values on the fluorescence intensity of Eu(III) complex was investigated. Under experimental conditions, the linear range was 9-50 ng mL(-1) for calf thymus DNA (CT- DNA) and the corresponding detection limit was 5 ng mL(-1). The results showed that Eu(III)-(9-ACA)(2) complex binds to CT-DNA with stability constant of 2.41 × 10(4) M.

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“…According to Laporte rule, the 4f-4f transitions in rare earth ions are forbidden to some extent; so the absorption and emission spectra observed in the Eu(III) ions have always weak intensity. The excited states of the Eu(III) ions may increase by its coordination to organic ligands, which act as sensitizers, and the ligands that have this property are called by Lehn " antennas" (19) . The organic ligand in Eu(III)-complex absorbs and transfers energy efficiently to the metal ion and increases its luminescence intensity consequently.…”

Section: Fig 1 Chemical Structure Of Bumetanidementioning

confidence: 99%

Characterization of Eu(III) Complex for Determination of Bumetanide in Pharmaceutical Preparations and in Biological Fluids

2016

Egypt. J. Chem.

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Synthesis and fluorescence properties of Eu-anthracene-9-carboxylic acid towards N-acetyl amino acids and nucleotides in different solvents

Cited by 49 publications

References 39 publications

2,4‐Dichlorophenoxyacetic Acid Derived Schiff Base and Its Lanthanide(III) Complexes: Synthesis, Characterization, Spectroscopic Studies, and Plant Growth Activity

2,4‐Dichlorophenoxyacetic Acid Derived Schiff Base and Its Lanthanide(III) Complexes: Synthesis, Characterization, Spectroscopic Studies, and Plant Growth Activity

Synthesis of Novel Eu(III) Luminescent Probe Based on 9- Acridinecarboxylic Acid Skelton for Sensing of ds-DNA

Characterization of Eu(III) Complex for Determination of Bumetanide in Pharmaceutical Preparations and in Biological Fluids

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