Homo dinuclear lanthanide(III) complexes of a mesogenic Schiff-base, N,N′-di-(4-decyloxysalicylidene)-1′,6′-diaminohexane: Synthesis and characterization

Shakya, Pawan Raj; Singh, Angad Kumar; Rao, T. R.

doi:10.1016/j.saa.2011.05.030

Cited by 18 publications

(8 citation statements)

References 32 publications

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“…The broad singlets at 5.0 ppm for O 2 H and at 2.0 ppm for O 10 H are due to the aromatic hydroxyl and allylic hydroxyl groups, respectively . The strong singlet at 8.13 ppm for H‐C 7 is assigned to the azomethine proton . The signal for H‐C 11 appears at 1.3 ppm as doublet ( J =9 Hz) assigned to the methyl group.…”

Section: Resultsmentioning

confidence: 88%

In vitro antimicrobial and antioxidant evaluation of rare earth metal Schiff base complexes derived from threonine

Lekha

Kamatchi²,

Rajmohan³

et al. 2014

Applied Organom Chemis

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Six novel Ln(III) Schiff base complexes were synthesized using rare earth metals with threonine and 5-bromosalicylaldehyde, namely Pr(III), Sm(III), Gd(III), Tb(III), Er(III) and Yb(III) Schiff bases. These complexes were characterized using elemental analysis, molar conductivity, Fourier transform infrared and UV-visible spectroscopies, and thermogravimetry-differential thermal analysis. The general formula of the complexes is [Ln(L)(NO 3 ) 2 (H 2 O)].NO 3 (L = Schiff base ligand). The spectroscopic data reveal that the Schiff base ligand behaves as a tridentate ligand with ONO donor atoms sequencing towards the central metal ion. An investigation of fluorescence properties of the Sm(III), Er(III) and Tb(III) complexes shows that the Ln(III) ions can be sensitized efficiently by the ligand to some extent. Antimicrobial activity testing indicates that all six complexes exhibit antibacterial and antifungal ability against microbes with broad antimicrobial spectra. In addition, the antioxidant properties of the complexes were also screened.

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Section: Resultsmentioning

confidence: 88%

In vitro antimicrobial and antioxidant evaluation of rare earth metal Schiff base complexes derived from threonine

Lekha

Kamatchi²,

Rajmohan³

et al. 2014

Applied Organom Chemis

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“…According to the antioxidant experiments, the IC 50 of the ligand, Eu III and Ce III complexes are 8.60 × 10 –5 , 6.82 × 10 –6 , and 8.7 × 10 –6 m (Figure a–c). The result suggests that the complexes exhibit better scavenging activity than the ligand, as well as mannitol and vitamin C. Due to the observed IC 50 values, the complexes can be considered as potential drugs to eliminate the hydroxyl radical , …”

Section: Resultsmentioning

confidence: 93%

Synthesis, Crystal Structure, Fluorescent and Antioxidation Properties of Cerium(III) and Europium(III) Complexes with Bis(3‐methoxysalicylidene)‐3‐oxapentane‐1,5‐diamine

Tang

Shi

et al. 2017

Zeitschrift anorg allge chemie

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Two aliphatic ether Schiff base lanthanide complexes (Ln = Eu, Ce) with bis(3‐methoxysalicylidene)‐3‐oxapentane‐1,5‐diamine (Bod), were synthesized and characterized by physicochemical and spectroscopic methods. [Eu(Bod)(NO3)3] (1) is a discrete mononuclear species and [Ce(Bod)(NO3)3DMF]∞ (2) exhibits an inorganic coordination polymer. In the two complexes, the metal ions both are ten‐coordinated and the geometric structure around the LnIII atom can be described as distorted hexadecahedron. Under excitation at room temperature, the red shift in the fluorescence band of the ligand in the complexes compared with that of the free ligand can be attributed to coordination of the rare earth ions to the ligand. Moreover, the antioxidant activities of the two complexes were investigated. The results demonstrated that the complexes have better scavenging activity than both the ligand and the usual antioxidants on the hydroxyl and superoxide radicals.

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“…Synthesis, characterization and photoluminescenceproperties 13 following signals б(ppm):3.6(2H,CH 2 g r oup), 7.5(1H,CH group), 6.10(H, -CH= in C3 of coumarin moiety) ,7.8(1H,NH group), 3.4 (1H, Ar-OH), 3.51(1H,OH-coumarin moiety) and 6.2-7.5 ppm are assigned to the proton of both phenolic and coumarin moiety [35,36].…”

Section: H Nmr Studiesmentioning

confidence: 99%

Synthesis, Characterization and Photoluminescenceproperties of New Coumarin Hydrazide and Its Lanthanide (Iii) Complexes

El-Sayed

Ibrahem

Shaaban

et al. 2014

Al-Azhar Bulletin of Science

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A novel coumarin hydrazide ligand derived from the condensation of 7-hydroxy coumarin-4-ethylacetate with salicylaldehyde hydrazone and its complexes with Sm(III) and Eu(III) have been synthesized. The ligand and its complexes have been characterized by the Elemental analysis, Molar conductivity, FTIR, 1HNMR, and U.V. & Visible spectra. The complexes have stoichiometry of the type [Ln(L) 2 (H 2 O) 2 ]NO 3 .2H 2 O where the ligand (HL) coordinates to the lanthanide ions Sm(III) and/or Eu(III) through azomethine nitrogen atom, phenolic oxygen of hydrazide moiety after deprotonation and ketonic oxygen of coumarin moiety. The fluorescence properties of complexes in different organic solvents (DMSO, DMF, Acetonitrile and Ethanol) have been studied. A strong red fluorescence of europium complex was observed and was attributed to the ligand energy transfers to the energy level of Eu(III).

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Homo dinuclear lanthanide(III) complexes of a mesogenic Schiff-base, N,N′-di-(4-decyloxysalicylidene)-1′,6′-diaminohexane: Synthesis and characterization

Cited by 18 publications

References 32 publications

In vitro antimicrobial and antioxidant evaluation of rare earth metal Schiff base complexes derived from threonine

In vitro antimicrobial and antioxidant evaluation of rare earth metal Schiff base complexes derived from threonine

Synthesis, Crystal Structure, Fluorescent and Antioxidation Properties of Cerium(III) and Europium(III) Complexes with Bis(3‐methoxysalicylidene)‐3‐oxapentane‐1,5‐diamine

Synthesis, Characterization and Photoluminescenceproperties of New Coumarin Hydrazide and Its Lanthanide (Iii) Complexes

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